Gotowe bibliografie tematyczne / QFT + GR

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Gotowa bibliografia na temat „QFT + GR”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "QFT + GR"

Ali, Ahmed Farag. "Unbreakable SU(3) Atoms of Vacuum Energy: A Solution to the Cosmological Constant Problem." Symmetry 17, no. 6 (2025): 888. https://doi.org/10.3390/sym17060888.

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Quantum field theory (QFT) and general relativity (GR) are pillars of modern physics, each supported by extensive experimental evidence. QFT operates within Lorentzian spacetime, while GR ensures local Lorentzian geometry. Despite their successes, these frameworks diverge significantly in their estimations of vacuum energy density, leading to the cosmological constant problem—a discrepancy where QFT estimates exceed observed values by 123 orders of magnitude. This paper addresses this inconsistency by tracing the cooling evolution of the universe’s gauge symmetries—from SU(3)×SU(2)×U(1) at hig

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MOORE, DOUGLAS G., and V. H. SATHEESHKUMAR. "THE FATE OF LORENTZ FRAME IN THE VICINITY OF BLACK HOLE SINGULARITY." International Journal of Modern Physics D 22, no. 12 (2013): 1342026. http://dx.doi.org/10.1142/s0218271813420261.

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General Relativity (GR) is known to break down at singularities. However, it is expected that quantum corrections become important when the curvature is of the order of Planck scale avoiding the singularity. By calculating the effect of tidal forces on a freely falling inertial frame, and assuming the least possible size of the frame to be of the Planck length, we show that the Lorentz frames cease to exist at a finite distance from the singularity. Within that characteristic radius, one cannot apply GR nor Quantum Field Theory (QFT) as we know them today. Additionally, we consider other quant

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Kumar, K. Sravan, and João Marto. "Towards a Unitary Formulation of Quantum Field Theory in Curved Spacetime: The Case of de Sitter Spacetime." Symmetry 17, no. 1 (2024): 29. https://doi.org/10.3390/sym17010029.

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Before we ask what the quantum gravity theory is, there is a legitimate quest to formulate a robust quantum field theory in curved spacetime (QFTCS). Several conceptual problems, especially unitarity loss (pure states evolving into mixed states), have raised concerns over several decades. In this paper, acknowledging the fact that time is a parameter in quantum theory, which is different from its status in the context of General Relativity (GR), we start with a “quantum first approach” and propose a new formulation for QFTCS based on the discrete spacetime transformations which offer a way to

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Hsiang, Jen-Tsung, Hing-Tong Cho, and Bei-Lok Hu. "Graviton Physics: A Concise Tutorial on the Quantum Field Theory of Gravitons, Graviton Noise, and Gravitational Decoherence." Universe 10, no. 8 (2024): 306. http://dx.doi.org/10.3390/universe10080306.

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The detection of gravitational waves in 2015 ushered in a new era of gravitational wave (GW) astronomy capable of probing the strong field dynamics of black holes and neutron stars. It has opened up an exciting new window for laboratory and space tests of Einstein’s theory of classical general relativity (GR). In recent years, two interesting proposals have aimed to reveal the quantum nature of perturbative gravity: (1) theoretical predictions on how graviton noise from the early universe, after the vacuum of the gravitational field was strongly squeezed by inflationary expansion; (2) experime

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Guinea Lagunes, A., M. Philippe Ponce, E. Contreras Aviles, et al. "P0539 Prevalence of QuantiFERON Positivity in Patients with Inflammatory Bowel Disease Eligible for Biological Therapy: Clinical and Demographic Analysis." Journal of Crohn's and Colitis 19, Supplement_1 (2025): i1096—i1097. https://doi.org/10.1093/ecco-jcc/jjae190.0713.

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Abstract Background Inflammatory Bowel Disease (IBD), when treated with biological therapies, increases the risk of infections such as tuberculosis (TB). QuantiFERON-TB Gold (QFT) is a diagnostic tool used to detect latent tuberculosis (LTBI) in immunosuppressed patients. Evaluating the prevalence of QFT positivity in IBD patients who are eligible for biological therapies is of utmost importance. Understanding the prevalence of latent TB in this population will help in implementing better preventive and therapeutic strategies. Methods A cross-sectional and relational study was conducted at the

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Revelli, Silvia, Héctor Berra, José Valenti, et al. "Efecto de la reinfección sobre la evolución de ratas infectadas con Trypanosoma cruzi." Revista do Instituto de Medicina Tropical de São Paulo 32, no. 4 (1990): 260–68. http://dx.doi.org/10.1590/s0036-46651990000400005.

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El objetivo de este trabajo fue comprobar si una de las variables medio-ambientales, la reinfección, puede modificar el comportamiento observado en un modelo de rata a nivel de parasitemia, anticuerpos séricos, manifestaciones electrocardiográficas y/o lesión miocárdica. Los grupos experimentales fueron: GI: ratas infectadas al destete con 1 x 10(6) T. cruzi; GR: igual a GI más reinfecciones cada 30 días hasta los 150 días post-infección inicial (p.i.i.); GI1 ratas de 51 días infectadas; GT: testigos. Se detectó parasitemia alta en GI y GR hasta los 20 días p.i.i. tendiendo a negativizarse al

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Halder, Tanushree, Hui Liu, Yinglong Chen, Guijun Yan, and Kadambot H. M. Siddique. "Identification of Candidate Genes for Root Traits Using Genotype–Phenotype Association Analysis of Near-Isogenic Lines in Hexaploid Wheat (Triticum aestivum L.)." International Journal of Molecular Sciences 22, no. 7 (2021): 3579. http://dx.doi.org/10.3390/ijms22073579.

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Global wheat (Triticum aestivum L.) production is constrained by different biotic and abiotic stresses, which are increasing with climate change. An improved root system is essential for adaptability and sustainable wheat production. In this study, 10 pairs of near-isogenic lines (NILs)—targeting four genomic regions (GRs) on chromosome arms 4BS, 4BL, 4AS, and 7AL of hexaploid wheat—were used to phenotype root traits in a semi-hydroponic system. Seven of the 10 NIL pairs significantly differed between their isolines for 11 root traits. The NIL pairs targeting qDSI.4B.1 GR varied the most, foll

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Mahardika, Nidya Shara, and Suci Agustina. "Usulan Perbaikan Desain Kemasan Produk Kiko Bakery Menggunakan Metode Quality Function Deployment (QFD)." Jurnal Manajemen Agribisnis dan Agroindustri 2, no. 1 (2022): 8–20. http://dx.doi.org/10.25047/jmaa.v2i1.29.

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Kiko Bakery merupakan salah satu UMKM di Jawa Timur yang mengalami penurunan produksi di tahun 2021. Penyebab hal tersebut terjadi dikarenakan banyaknya pesaing bisnis yang muncul dan juga desain kemasan yang kurang menarik serta belum adanya keamasan sekunder yang layak untuk membungkus kemasan sehingga ditemukan banyak produk mengalami kerusakan karena masih dibungkus menggunakan kantung plastik. Peningkatan kualitas kemasan dapat menjadi jawaban dari permasalaan yang ada untuk menarik kembali minat konsumen dan menaikkan penjualan. Penelitian ini bertujuan untuk memberikan usulan perbaikan

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Sydney, Ernest Grimm. "Quanta transfer in space is conserved." https://www.academia.edu/33076233/Quanta_transfer_in_space_is_conserved, May 16, 2017. https://doi.org/10.5281/zenodo.580326.

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Physical phenomena emerge from the quantum fields everywhere in space. However, not only the phenomena emerge from the quantum fields, the law of the conservation of energy must have its origin from the same spatial structure. This paper describes the relations between the main law of physics and the mathematical structure of the “aggregated” quantum fields.

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Ohad, Manor. "8T, QFT and GR- Synthesis To GUT." April 17, 2021. https://doi.org/10.5281/zenodo.5034213.

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The paper examines the frameworks of each theory alongside it's weakness and than try to reason for a way to create a synthesis by using the new framework on the 8- theory. The overall result to yield a unified theory which is simple and accurate. Using the advancements of The 8-Theory it can be done. 

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Części książek na temat "QFT + GR"

Zinn-Justin, Jean. "Elements of classical and quantum gravity." In Quantum Field Theory and Critical Phenomena. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198834625.003.0028.

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This chapter has two purposes; to describe a few elements of differential geometry that are required in different places in this work, and to provide, for completeness, a short introduction to general relativity (GR) and the problem of its quantization. A few concepts related to reparametrization (more accurately, diffeomorphism) of Riemannian manifolds, like parallel transport, affine connection, or curvature, are recalled. To define fermions on Riemannian manifolds, additional mathematical objects are required, the vielbein and the spin connection. Einstein–Hilbert's action for classical gra

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Frittelli, Simonetta, E. T. Newman,, and Carlos Kozameh. "An Unorthodox View of GR via Characteristic Surfaces." In The Geometric Universe. Oxford University PressOxford, 1998. http://dx.doi.org/10.1093/oso/9780198500599.003.0022.

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Abstract We would like to describe a novel and unorthodox approach to GR that is based on the existence of special families of 3-surfaces in a four manifold. (The details, with proofs, have been given elsewhere (Frittelli et al. 1995a, 1995b, 1995c, 1995d).) However, before saying what this novel approach is, we discuss the background and some issues of motivation. We (with many others) feel that finding the relationship between GR and quantum theory, QT, is (one of) the most fundamental problems of theoretical physics and perhaps one of the most difficult.

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