Relevant bibliographies by topics / GRW collapse model

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Academic literature on the topic 'GRW collapse model'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "GRW collapse model"

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te Vrugt, Michael, Gyula I. Tóth, and Raphael Wittkowski. "Master equations for Wigner functions with spontaneous collapse and their relation to thermodynamic irreversibility." Journal of Computational Electronics 20, no. 6 (2021): 2209–31. http://dx.doi.org/10.1007/s10825-021-01804-6.

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AbstractWigner functions, allowing for a reformulation of quantum mechanics in phase space, are of central importance for the study of the quantum-classical transition. A full understanding of the quantum-classical transition, however, also requires an explanation for the absence of macroscopic superpositions to solve the quantum measurement problem. Stochastic reformulations of quantum mechanics based on spontaneous collapses of the wavefunction are a popular approach to this issue. In this article, we derive the dynamic equations for the four most important spontaneous collapse models—Ghirar
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J, Oukzon, Potapov A.A, and Podosenov S.A. "Schrodinger's cat paradox resolution using GRW collapse model." International Journal of Recent advances in Physics 3, no. 3 (2014): 17–30. http://dx.doi.org/10.14810/ijrap.2014.3302.

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Tumulka, Roderich. "On spontaneous wave function collapse and quantum field theory." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, no. 2070 (2006): 1897–908. http://dx.doi.org/10.1098/rspa.2005.1636.

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One way of obtaining a version of quantum mechanics without observers, and thus of solving the paradoxes of quantum mechanics, is to modify the Schrödinger evolution by implementing spontaneous collapses of the wave function. An explicit model of this kind was proposed in 1986 by Ghirardi, Rimini & Weber (GRW), involving a nonlinear, stochastic evolution of the wave function. We point out how, by focusing on the essential mathematical structure of the GRW model and a clear ontology, it can be generalized to (regularized) quantum field theories in a simple and natural way.
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Piccirilli, María Pía, Gabriel León, Susana J. Landau, Micol Benetti, and Daniel Sudarsky. "Constraining quantum collapse inflationary models with current data: The semiclassical approach." International Journal of Modern Physics D 28, no. 02 (2019): 1950041. http://dx.doi.org/10.1142/s021827181950041x.

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The hypothesis of the self-induced collapse of the inflaton wave function was introduced as a candidate for the physical process responsible for the emergence of inhomogeneity and anisotropy at all scales. In particular, we consider different proposal for the precise form of the dynamics of the inflaton wave function: (i) the GRW-type collapse schemes proposals based on spontaneous individual collapses which generate nonvanishing expectation values of various physical quantities taken as ansatz modifications of the standard inflationary scenario; (ii) the proposal based on a Continuous Spontan
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Foukzon, Jaykov, Alex Potapov, Elena Men’kova, and Stanislav Podosenov. "Schrödinger’s Cat Paradox Resolution Using GRW Collapse Model: Von Neumann Measurement Postulate Revisited." Journal of Applied Mathematics and Physics 05, no. 02 (2017): 494–521. http://dx.doi.org/10.4236/jamp.2017.52044.

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Peng, Zong-kai, Zi-ke Liu, Bin-Bin Zhang, and He Gao. "GRBs from Collapse of Thorne–Żytkow–like Objects as the Aftermath of WD-NS Coalescence." Astrophysical Journal 967, no. 2 (2024): 156. http://dx.doi.org/10.3847/1538-4357/ad3ba6.

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Abstract The Type II gamma-ray burst (GRB) 200826A challenges collapsar models by questioning how they can generate a genuinely short-duration event. The other Type I GRB 211211A confused us with a kilonova signature observed in the afterglow of a long burst. Here, we propose a comprehensive model in which both bursts are the results of the collapse of Thorne–Żytkow–like objects (TZlOs). The TZlO consists of a central neutron star (NS), with a dense white dwarf (WD) material envelope, which is formed as the aftermath of a WD-NS coalescence. We find that the characteristics of the resultant GRB
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Gottlieb, Ore, Mathieu Renzo, Brian D. Metzger, Jared A. Goldberg, and Matteo Cantiello. "She’s Got Her Mother’s Hair: Unveiling the Origin of Black Hole Magnetic Fields through Stellar to Collapsar Simulations." Astrophysical Journal Letters 976, no. 1 (2024): L13. http://dx.doi.org/10.3847/2041-8213/ad8563.

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Abstract Relativistic jets from a Kerr black hole (BH) following the core collapse of a massive star (“collapsar”) is a leading model for gamma-ray bursts (GRBs). However, the two key ingredients for a Blandford–Znajek-powered jet—rapid rotation and a strong magnetic field—seem mutually exclusive. Strong fields in the progenitor star’s core transport angular momentum outward more quickly, slowing down the core before collapse. Through innovative multidisciplinary modeling, we first use MESA stellar evolution models followed to core collapse to explicitly show that the small length scale of the
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Tanga, M., T. Krühler, P. Schady, et al. "The environment of the SN-less GRB 111005A at z = 0.0133." Astronomy & Astrophysics 615 (July 2018): A136. http://dx.doi.org/10.1051/0004-6361/201731799.

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The collapsar model has proved highly successful in explaining the properties of long γ-ray bursts (GRBs), with the most direct confirmation being the detection of a supernova (SN) coincident with the majority of nearby long GRBs. Within this model, a long GRB is produced by the core-collapse of a metal-poor, rapidly rotating, massive star. The detection of some long GRBs in metal-rich environments, and more fundamentally the three examples of long GRBs (GRB 060505, GRB 060614 and GRB 111005A) with no coincident SN detection down to very deep limits is in strong contention with theoretical exp
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STAFF, J., B. NIEBERGAL, and R. OUYED. "A THREE-STAGE MODEL FOR THE INNER ENGINE OF GRBs: PROMPT EMISSION AND EARLY AFTERGLOW." International Journal of Modern Physics D 17, no. 09 (2008): 1383–89. http://dx.doi.org/10.1142/s0218271808012954.

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We describe a model within the "quark-nova" scenario to interpret the recent observations of early X-ray afterglows of long gamma-ray bursts (GRBs) with the Swift satellite. This is a three-stage model within the context of a core-collapse supernova. STAGE 1 is an accreting (proto-) neutron star leading to a possible delay between the core collapse and the GRB. STAGE 2 is accretion onto a quark star, launching an ultrarelativistic jet generating the prompt GRB. This jet also creates the afterglow as the jet interacts with the surrounding medium creating an external shock. Slower shells ejected
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Ivy Wang, Xiangyu, Bin-Bin Zhang, and Wei-Hua Lei. "GRB 200826A: A Precursor of a Long Gamma-Ray Burst with Missing Main Emission." Astrophysical Journal Letters 931, no. 1 (2022): L2. http://dx.doi.org/10.3847/2041-8213/ac6c7e.

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Abstract The recently discovered peculiar gamma-ray burst GRB 200826A poses a dilemma for the collapsar model. Although all other characteristics of the burst are consistent with it being a Type II (i.e., collapse of a massive star) event, the observed duration of the event is only approximately 1 s, which is at odds with the predicted allowable timescale range for a collapsar event. To resolve this dilemma, this Letter proposes that the original burst could be an intrinsically long GRB comprising a precursor and a main emission phase. However, the main emission phase is missed due to either p
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Books on the topic "GRW collapse model"

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Maggiore, Michele. Stellar collapse. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198570899.003.0001.

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Stellar collapse and supernova explosions. Properties and classification of supernovae. Historical supernovae. Explosion mechanisms and core-collapse dynamics. The remnant of the collapse. GW production during core collapse, bar-mode instabilities, anisotropic neutrino emission.
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Turchin, Peter. Historical Dynamics. Princeton University Press, 2018. http://dx.doi.org/10.23943/princeton/9780691180779.001.0001.

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Many historical processes are dynamic. Populations grow and decline. Empires expand and collapse. Religions spread and wither. Natural scientists have made great strides in understanding dynamical processes in the physical and biological worlds using a synthetic approach that combines mathematical modeling with statistical analyses. Taking up the problem of territorial dynamics—why some polities at certain times expand and at other times contract—this book shows that a similar research program can advance our understanding of dynamical processes in history. The book develops hypotheses from a
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Auty, Richard M., and Haydn I. Furlonge. The Rent Curse. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198828860.001.0001.

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This book analyses the political economy of economic development using two stylized facts models of rent-driven growth. The models show that: (i) the resource curse is a variant of a wider rent curse that can be driven by geopolitical rent (foreign aid), labour rent (worker remittances), or regulatory rent (government manipulation of relative prices); (ii) the rent curse is caused by policy failure and is avoidable; (iii) the global incidence of the rent curse varies over time, which reflects development policy fashions; and (iv) the intensity of the rent curse also varies with rent linkages.
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Johansen, Bruce, and Adebowale Akande, eds. Nationalism: Past as Prologue. Nova Science Publishers, Inc., 2021. http://dx.doi.org/10.52305/aief3847.

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Nationalism: Past as Prologue began as a single volume being compiled by Ad Akande, a scholar from South Africa, who proposed it to me as co-author about two years ago. The original idea was to examine how the damaging roots of nationalism have been corroding political systems around the world, and creating dangerous obstacles for necessary international cooperation. Since I (Bruce E. Johansen) has written profusely about climate change (global warming, a.k.a. infrared forcing), I suggested a concerted effort in that direction. This is a worldwide existential threat that affects every living t
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Book chapters on the topic "GRW collapse model"

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Matouschek, Andreas, Luis Serrano, and Alan R. Fersht. "Analysis of Protein Folding by Protein Engineering." In Mechanisms of Protein Folding. Oxford University PressOxford, 1994. http://dx.doi.org/10.1093/oso/9780199633968.003.0006.

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Abstract Denatured proteins can in many cases refold to the native structure. It is generally accepted that the folding has to progress along a specific pathway (1), although Harrison and Durbin (2) have argued that folding could follow many different parallel pathways (jigsaw puzzle model). Several different models of protein folding have been proposed. The framework model (3) suggests that the earliest steps are the formation of native secondary structure elements, while an alternative model proposes that folding begins with a rapid hydrophobic collapse (4-7). A somewhat different view is re
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"The Fear of False Belief." In Public Confessions, edited by Rebecca L. Davis. University of North Carolina Press, 2021. http://dx.doi.org/10.5149/northcarolina/9781469664873.003.0004.

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Harvey Matusow joined the Communist Party in the mid-1940s but soon grew disenchanted and refashioned himself as a prolific government informant. His confession a few years later that he had fabricated much of the intelligence he gave the FBI helped bring about the collapse of the informant system. His story previewed themes that grew more prominent in American popular culture by the early 1960s, in books and films such as The Manchurian Candidate, where a model of patriotism turns out to suffer from mind control at the hands of Soviets seeking to destroy American democracy. The Matusow story
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Fogarty, Michael J., and Jeremy S. Collie. "Density-Dependent Population Growth." In Fishery Ecosystem Dynamics. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198768937.003.0003.

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The observation that no population can grow indefinitely and that most populations persist on ecological timescales implies that mechanisms of population regulation exist. Feedback mechanisms include competition for limited resources, cannibalism, and predation rates that vary with density. Density dependence occurs when per capita birth or death rates depend on population density. Density dependence is compensatory when the population growth rate decreases with population density and depensatory when it increases. The logistic model incorporates density dependence as a simple linear function.
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Wei, Rong, Wei Xu, and Tingfeng Ming. "Experimental and Computational Studies on Characteristics of Cavitation Flow in Centrifugal Pump." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2024. http://dx.doi.org/10.3233/faia241224.

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The work presents the investigation of characteristics of the cavitation flow in a centrifugal pump using a combination of experimental and computational studies. In experimental studies, the head drop curve and pressure signals were dynamically measured. The numerical computations were implemented based on Zwart mass transfer cavitation model and a modified RNG k-ε turbulence model. The computational head drop curve showed good agreement with the experimental results. The computational results and experimental results revealed that the cavitation of a centrifugal pump could be divided into fo
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Mintrom, Michael, and Madeline Thomas. "New Zealand’s Economic Turnaround." In Great Policy Successes. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198843719.003.0014.

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In the early 1980s, global events and New Zealand’s government response drove the country towards economic collapse. Debt, inflation, and unemployment grew. To address the crisis, several legislative reforms in the style of New Public Management were passed between the mid-1980s and early 1990s. The currency was floated, price and income controls were relaxed, state-owned enterprises such as the national airline were corporatized, government accounting was scrutinized, and outputs rather than inputs were monitored in government departments. These reforms transformed New Zealand into a country
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Sloman, Peter. "Redistribution in a Cold Climate." In Transfer State. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198813262.003.0006.

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Deindustrialization and stagflation transformed the context in which social policy was made during the 1970s and 1980s. One of the foundations of Margaret Thatcher’s electoral success was a public backlash against welfare spending and the tax burden. Nevertheless, the idea of a guaranteed income continued to resonate for three reasons. Firstly, the collapse of the post-war employment model opened up a wide-ranging debate about the future of work, and basic income began to attract support as a way of underpinning the transition to a more flexible labour market. Secondly, developments in economi
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Cunliffe, Barry. "An End and a Beginning." In Facing the Sea of Sand. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/oso/9780192858887.003.0006.

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Abstract For North Africa, this was a period of regime change. Roman rule came to an end when a Germanic tribe, the Vandals invaded in 426. They lasted for little more than a century, ousted when North Africa was reclaimed by the Byzantines, successors of Rome. Their period of dominance was even shorter. In 641 the Arab armies conquered Egypt and by 730 had extended their rule across the whole of North Africa, introducing the new religion of Islam. This turbulent 300 years saw the Berber peoples of the region become increasingly more powerful, their tribal groups forming confederacies to fight
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Pomar, Luis, Juan Ignacio Baceta, and G. Mateu-Vicens. "The upper Miocene reef-rimmed platform of Mallorca (Spain): factory structure, growth dynamics and diagenesis." In Field guides to exceptionally exposed carbonate outcrops. International Association of Sedimentologists, 2021. http://dx.doi.org/10.54780/iasfg3/13.

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The Llucmajor platform on southern Mallorca Island (Spain) is one of the best-exposed Miocene shallow-water carbonate platforms known in the world. Up to 90 m vertical sea cliffs provide a clean, continuous and detailed 3D view of the facies architecture and continuous cores from fifty-two water wells, affording information to interpret the 3D architecture of this 20 km-wide and only slightly deformed carbonate platform. Forty years of research on the Llucmajor platform provided insights into how the mutual interaction of biological and physical processes control the type of carbonate producti
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deBuys, William. "Highway 79 Revisited: “Mega” Trends in the Sun Corridor." In A Great Aridness. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199778928.003.0012.

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Whether you are breaking prairie sod in the nineteenth century or raising a family and scrambling to make ends meet in the twenty-first, it is hard to get worked up over abstract possibilities. There is too much that needs doing, right here, right now. Even knowing the odds, people still live in earthquake zones, hurricane alleys, and the unprotected floodplains of mighty rivers. The warm embrace of a thirsty aridland city is not so different. Generally speaking, it is hard for any of us to get seriously concerned about what might happen until it does happen. That’s why the politics of climate
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Busby, Cathy J., Rebecca A. Morris, Susan M. DeBari, et al. "Geology of a Large Intact Extensional Oceanic Arc Crustal Section with Superior Exposures: Cretaceous Alisitos Arc, Baja California (Mexico)." In Geology of a Large Intact Extensional Oceanic Arc Crustal Section with Superior Exposures: Cretaceous Alisitos Arc, Baja California (Mexico). Geological Society of America, 2023. http://dx.doi.org/10.1130/2023.2560(01).

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ABSTRACT The Rosario segment of the Early Cretaceous Alisitos oceanic arc exposes the transition from upper-crustal volcanic and hypabyssal rocks to middle-crustal plutons, which formed in an extensional environment. The Rosario segment forms a structurally intact, unmetamorphosed, spectacularly well-exposed, gently tilted section that is 50 km long and 7 km deep. The top of the exposed section is unconformably overlain by flat-lying Late Cretaceous sedimentary rocks (Rosario Group, described elsewhere), and the base of the section passes downward into ductilely deformed metamorphic rocks (not
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Conference papers on the topic "GRW collapse model"

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Yuan, Lin, and Stelios Kyriakides. "Wrinkling Failure of Lined Pipe Under Bending." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11139.

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Lining internally a carbon steel pipe with a thin layer of corrosion resistant material is an economical method for protecting offshore tubulars from the corrosive ingredients of hydrocarbons. In applications involving severe plastic bending, such as reeling, the liner can detach from the outer pipe and develop large amplitude buckles that compromise the flow. This paper outlines a numerical framework for establishing the extent to which lined pipe can be bent before liner collapse. The manufacturing process of lined pipes is simulated and a set of 12-inch pipes are plastically bent. The two t
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Limam, A., L. H. Lee, E. Corona, and S. Kyriakides. "Plastic Buckling and Collapse of Tubes Under Bending and Internal Pressure." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57986.

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This paper presents results from a recent combined experimental-analytical study of the inelastic response and the sequence of events that lead to collapse of pipes bent under internal pressure. Experimental results from stainless steel 321 seamless tubes with D/t of 52 are reported. The tubes were loaded by pure bending at fixed values of pressure ranging from zero to a value that corresponds to 0.75 times the yield pressure. The moment-curvature response is governed by the inelastic characteristics of the material. Bending induces some ovalization to the tube cross section while, simultaneou
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Jiao, Rong, and Stelios Kyriakides. "Ratcheting, Wrinkling and Collapse of Tubes Induced by Axial Cycling Under Internal Pressure." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49706.

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A buried offshore pipeline is essentially axially constrained by the soil cover. Heating by the passage of hot oil at high pressure can plastically deform it. The deformation involves expansion of the diameter, which for thinner pipes can be accompanied by axisymmetric wrinkling. During a lifetime of 20 or more years, lines experience regular startup and shutdown cycles. This study examines how this cycling affects wrinkling and the hoop expansion of such lines. A set of experiments on super-duplex tubes with D/t of 28.5 was conducted using the following idealized cyclic loading history. A tub
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Chung, S. "Modelling of Powder Filling of HIP Canisters." In Hot Isostatic Pressing. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902837-19.

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Abstract. Hot-isostatic pressing (HIPing) of powders is achieved by placing them inside a canister, which is then evacuated and sealed. Canister filling is a critical step. Consistency in powder packing in the canister and increases in packing density will improve process efficiency and the predictability of HIP canister collapse, leading to less wastage. Understanding the effect of powder morphology, properties and characteristics on the can filling process and subsequent compaction is vital to optimizing canister design and the filling system. Conventionally, this has involved conducting num
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Wiens, A. Josh, and Amos G. Winter. "A Novel Pressure Compensating Valve for Low-Cost Drip Irrigation." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35131.

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This paper presents a novel pressure-compensating flow restrictor for low-cost/low-pressure drip irrigation systems. There are nearly one billion subsistence farmers in the developing world who lack the resources and opportunities to rise out of poverty. Irrigation is an effective development strategy for this population, enabling farmers to increase crop yields and grow more lucrative plant varieties. Unfortunately, as a large fraction of subsistence farmers live off the electrical grid, the capital cost of solar or diesel powered irrigation systems makes them unobtainable. This cost could be
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Olson, Richard J., Bruce A. Young, and Brian Leis. "Findings From an Investigation of Hydrotest Protocols." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64146.

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Experience has shown that in-service failures can occur in Electric Resistance Welded (ERW) line pipe shortly after a hydrotest as a part of line rehabilitation or in retesting to return to service. This can occur due to near-critical features that grew but remained in the line, or due to a pressure-reversal due to stable defect growth during the pressure test. The objective of this study was to improve hydrotesting protocols by developing and optimizing procedures for conducting hydrotests of pipe with ERW or Flash Welded (FW) seam defects, and validating the practical utility of the proposed
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Stadie-Frohbo¨s, Gundula, Uwe Zerbst, and Thomas Plonski. "Fracture Mechanics Approach for the Assessment of a Damaged Pipeline." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29446.

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Nowadays, the damage assessment of pipelines using fracture mechanics techniques is a state-of-the-art methodology which allows a judgement whether the pipeline is fit-for-purpose over the residual lifetime (perhaps with a reduced pressure load) or has to be repaired or replaced. However, in some circumstances, uncertainty exists about its correct application, as this may be a matter of interpretation. This paper describes the analysis of a damaged pipeline based on a fracture mechanics approach for which the straightforward application of the flaw assessment standard BS 7910 without additiona
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Nishimura, T., K. Kimura, T. Kawasaki, and M. Kohno. "Analysis of Convergence Confinement of Circular Tunnel by Supporting Elements Using Elasto-Plastic Solution of Ground." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0899.

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ABSTRACT: The paper presents an analytical model for the interaction between the tunnel ground and the installed support system. Firstly, an analytical solution for the problem of stress-displacement around a circular tunnel in an elasto-perfectly-plastic medium is introduced. Shotcrete and steel sets are treated as the composite section of a straight beam as a homogenized section of equivalent mechanical properties of the two materials, and the contribution of the supporting elements, including rock bolt, is incorporated into the solution as uniformly distributed radial pressures. Then, the e
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Ali, H., M. Shahzaib, M. Z. Emad, M. Waqas, and W. Ijaz. "Stability Analysis of a Tunnel Nearby Folded Strata Using Numerical Modeling." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0862.

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ABSTRACT: The stability of underground structures, like mines and tunnels, has always been a major concern in the field of underground space development works. Reliable prediction of tunnel stability is a key challenge for tunnel engineering, especially when drilling in folded rock masses. Folded strata are layers of rock that have been folded and deformed by tectonic forces. This can create complex geological structures that are difficult for tunnel engineers. This research aims to investigate the stability of tunnels through folded strata (anticline, syncline, and fracture zones). Failure Se
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Nijhawan, Sunil, and YongMann Song. "Simulation of Severe Accident Progression Using ROSHNI: A New Integrated Simulation Code for PHWR Severe Accidents." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16633.

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Abstract As analysts still grapple with understanding core damage accident progression at Three Mile Island and Fukushima that caught the nuclear industry off-guard once too many times, one notices the very limited detail with which the large reactor cores of these subject reactors have been modelled in their severe accident simulation code packages. At the same time, modelling of CANDU severe accidents have largely borrowed from and suffered from the limitations of the same LWR codes (see IAEA TECDOC 1727) whose applications to PHWRs have poorly caught critical PHWR design specifics and vulne
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