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Letteratura scientifica selezionata sul tema "Quantum spin models"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 3 febbraio 2022

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Articoli di riviste sul tema "Quantum spin models"

1

Shik, H. Y., Y. Q. Li, and H. Q. Lin. "Constructing soluble quantum spin models." Nuclear Physics B 666, no. 3 (September 2003): 337–60. http://dx.doi.org/10.1016/s0550-3213(03)00464-4.

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2

Zhang, Guo-Feng, Heng Fan, Ai-Ling Ji, Zhao-Tan Jiang, Ahmad Abliz, and Wu-Ming Liu. "Quantum correlations in spin models." Annals of Physics 326, no. 10 (October 2011): 2694–701. http://dx.doi.org/10.1016/j.aop.2011.05.002.

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3

MIKOVIĆ, A. "SPIN-CUBE MODELS OF QUANTUM GRAVITY." Reviews in Mathematical Physics 25, no. 10 (November 2013): 1343008. http://dx.doi.org/10.1142/s0129055x13430083.

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We study the state-sum models of quantum gravity based on a representation 2-category of the Poincaré 2-group. We call them spin-cube models, since they are categorical generalizations of spin-foam models. A spin-cube state sum can be considered as a path integral for a constrained 2-BF theory, and depending on how the constraints are imposed, a spin-cube state sum can be reduced to a path integral for the area-Regge model with the edge-length constraints, or to a path integral for the Regge model. We also show that the effective actions for these spin-cube models have the correct classical li

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4

Franjic, F., and S. Sorella. "Spin-Wave Wave Function for Quantum Spin Models." Progress of Theoretical Physics 97, no. 3 (March 1, 1997): 399–406. http://dx.doi.org/10.1143/ptp.97.399.

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5

MIKOVIĆ, A. "NEW SPIN FOAM MODELS OF QUANTUM GRAVITY." Modern Physics Letters A 20, no. 17n18 (June 14, 2005): 1305–13. http://dx.doi.org/10.1142/s0217732305017779.

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We give a brief and a critical review of the Barret-Crane spin foam models of quantum gravity. Then we describe two new spin foam models which are obtained by direct quantization of General Relativity and do not have some of the drawbacks of the Barret-Crane models. These are the model of spin foam invariants for the embedded spin networks in loop quantum gravity and the spin foam model based on the integration of the tetrads in the path integral for the Palatini action.

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6

Bahr, Benjamin, Bianca Dittrich, and James P. Ryan. "Spin Foam Models with Finite Groups." Journal of Gravity 2013 (July 24, 2013): 1–28. http://dx.doi.org/10.1155/2013/549824.

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Spin foam models, loop quantum gravity, and group field theory are discussed as quantum gravity candidate theories and usually involve a continuous Lie group. We advocate here to consider quantum gravity-inspired models with finite groups, firstly as a test bed for the full theory and secondly as a class of new lattice theories possibly featuring an analogue diffeomorphism symmetry. To make these notes accessible to readers outside the quantum gravity community, we provide an introduction to some essential concepts in the loop quantum gravity, spin foam, and group field theory approach and poi

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7

KOO, W. M., and H. SALEUR. "FUSED POTTS MODELS." International Journal of Modern Physics A 08, no. 29 (November 20, 1993): 5165–233. http://dx.doi.org/10.1142/s0217751x93002071.

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Generalizing the mapping between the Potts model with nearest neighbor interaction and the six-vertex model, we build a family of “fused Potts models” related to the spin k/2 U q su (2) invariant vertex model and quantum spin chain. These Potts models still have variables taking values 1, …,Q[Formula: see text] but they have a set of complicated multispin interactions. The general technique to compute these interactions, the resulting lattice geometry, symmetries, and the detailed examples of k=2, 3 are given. For Q>4, spontaneous magnetizations are computed on the integrable first order ph

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8

Wei, Tzu-Chieh. "Quantum spin models for measurement-based quantum computation." Advances in Physics: X 3, no. 1 (January 2018): 1461026. http://dx.doi.org/10.1080/23746149.2018.1461026.

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9

Montambaux, Gilles, Didier Poilblanc, Jean Bellissard, and Clément Sire. "Quantum chaos in spin-fermion models." Physical Review Letters 70, no. 4 (January 25, 1993): 497–500. http://dx.doi.org/10.1103/physrevlett.70.497.

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10

Perez, Alejandro. "Spin foam models for quantum gravity." Classical and Quantum Gravity 20, no. 6 (February 21, 2003): R43—R104. http://dx.doi.org/10.1088/0264-9381/20/6/202.

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Tesi sul tema "Quantum spin models"

1

Oriti, Daniele. "Spin foam models of quantum spacetime." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620008.

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2

Collins, Alexander Rory Physics Faculty of Science UNSW. "Quantum lattice models." Publisher:University of New South Wales. Physics, 2008. http://handle.unsw.edu.au/1959.4/43408.

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This thesis presents studies of the low energy properties of nseveral frustrated spin-1/2 Heisenberg antiferromagnets using various analytic and computational methods. The models studied include the union jack model, the alternating Heisenberg chain, the Heisenberg bilayer model, and the spin-Peierls model. The union jack model is a Heisenberg antiferromagnetic spin model with frustration, and is analyzed using spin-wave theory. For small values of the frustrating coupling $\alpha$, the system is N{\' e}el ordered, while for large $\alpha$ the frustration is found to induce a canted phase. Spi

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3

Dowdall, R. J. "Spin foam models for 3D quantum geometry." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/11755/.

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Various aspects of three-dimensional spin foam models for quantum gravity are discussed. Spin foam models and graphical calculus are introduced via the Ponzano-Regge model for 3d gravity and some important properties of this model are described. The asymptotic formula for the 6j symbol found by Ponzano and Regge is generalised to include the Ponzano-Regge amplitude for triangulations of handlebodies. Some simple observables are computed in a model for fermions coupled to 3d gravity. The result is a sum over spin foam models with certain vertex amplitudes which are described. An explicit exampl

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4

Murgan, Rajan. "Bethe Ansatz and Open Spin-1/2 XXZ Quantum Spin Chain." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/69.

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The open spin-1/2 XXZ quantum spin chain with general integrable boundary terms is a fundamental integrable model. Finding a Bethe Ansatz solution for this model has been a subject of intensive research for many years. Such solutions for other simpler spin chain models have been shown to be essential for calculating various physical quantities, e.g., spectrum, scattering amplitudes, finite size corrections, anomalous dimensions of certain field operators in gauge field theories, etc. The first part of this dissertation focuses on Bethe Ansatz solutions for open spin chains with nondiagonal bo

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5

Liu, Chen. "Variational methods and their applications to frustrated quantum spin models." Thesis, Boston University, 2012. https://hdl.handle.net/2144/32030.

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Thesis (Ph.D.)--Boston University<br>PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>Quantum spin models are useful in many areas of physics, such as strongly correlated materials and quantum phase transitions, or, generally, quantum many-body systems. Most of the models of interest are not a

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6

Harada, Kenji. "Numerical Study of Quantum Spin Models by Loop Algorithm." Kyoto University, 1998. http://hdl.handle.net/2433/77874.

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7

Nicotra, Alessandro. "Analytical map between EPRL spin foam models in loop quantum gravity." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23179/.

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Loop Quantum Gravity (LQG) is one of the theoretical frameworks attempting to build a quantum theory of gravitation. Spin Foam theory provides a regularized, background-independent, and Lorentz covariant path integral for the transition amplitudes between LQG kinematical states. The state of the art of the theory is the EPRL model, formulated with the Euclidean and the Lorentzian signatures. They differ by their gauge group structures, which are respectively SO(4,R) and SO(1,3). The first is a compact group: it has finite-dimensional unitary irreducible representations, and the integral on

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8

Shevchenko, Pavel Physics Faculty of Science UNSW. "Quantum Phenomena in Strongly Correlated Electrons Systems." Awarded by:University of New South Wales. Physics, 1999. http://handle.unsw.edu.au/1959.4/32669.

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Quantum phenomena in high-Tc superconductors and dimerized quantum Heisenberg antiferromagnets are studied analytically in this thesis. The implications of the Fermi surface consisting of the disjoint pieces, observed in cuprate superconductors, are considered. It is demonstrated that in this case the g-wave superconducting pairing is closely related to d-wave pairing. The superconductivity in this system can be described in terms of two almost degenerate superconducting condensates. As a result a new spatial scale lg, much larger than the superconducting correlation length x, arises and a

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9

Sarno, Giorgio. "A numerical approach to spin foam models of quantum gravity." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0231.

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Les modèles de mousse de spin proposent une définition covariante de Lorentz de la dynamique de la gravité quantique en boucle.C'est une approche non-perturbative qui a déjà obtenu un résultat important, reproduire la Relativité Générale discrétisée dans une limite semi-classique. Cependant, la complexité analytique des modèles est telle que des questions clés concernant leur cohérence théorique et leurs prédictions physiques restent ouvertes. Dans cette thèse, j'introduis un cadre systématique pour effectuer des calculs numériques dans ce domaine. La thèse contient une introduction aux théori

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10

Erbe, Björn [Verfasser], and John [Akademischer Betreuer] Schliemann. "Central spin models: Quantum integrability and hyperfine induced spin dynamics / Björn Erbe. Betreuer: John Schliemann." Regensburg : Universitätsbibliothek Regensburg, 2011. http://d-nb.info/1022820346/34.

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Libri sul tema "Quantum spin models"

1

The spin structure of the proton. Singapore: World Scientific, 2008.

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2

1973-, Warzel Simone, ed. Random operators: Disorder effects on quantum spectra and dynamics. Providence, Rhode Island: American Mathematical Society, 2015.

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3

Barcelona), International Workshop on Quantum Effects in the MSSM (1997 Universitat Autónoma de. Proceedings of the International Workshop on Quantum Effects in the MSSM: Universitat Autònoma de Barcelona, Catalonia, Spain, 9-13 September 1997. Singapore: World Scientific, 1998.

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4

Trends in number theory: Fifth Spanish meeting on number theory, July 8-12, 2013, Universidad de Sevilla, Sevilla, Spain. Providence, Rhode Island: American Mathematical Society, 2015.

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5

Eckle, Hans-Peter. Models of Quantum Matter. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199678839.001.0001.

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This book focuses on the theory of quantum matter, strongly interacting systems of quantum many–particle physics, particularly on their study using exactly solvable and quantum integrable models with Bethe ansatz methods. Part 1 explores the fundamental methods of statistical physics and quantum many–particle physics required for an understanding of quantum matter. It also presents a selection of the most important model systems to describe quantum matter ranging from the Hubbard model of condensed matter physics to the Rabi model of quantum optics. The remaining five parts of the book examine

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6

Golizadeh-Mojarad, Roksana, and Supriyo Datta. NEGF-based models for dephasing in quantum transport. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.3.

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This article describes the use of NEGF-based models for elastic dephasing in quantum transport. The non-equilibrium Green's function (NEGF) method provides a rigorous prescription for including any kind of dephasing mechanisms to any order starting from a microscopic Hamiltonian through an appropriate choice of the self-energy function. The article first introduces the general approach to quantum transport that provides a general method for modelling a wide class of nanotransistor and spin devices. It then discusses the effect of different types of dephasing on momentum and spin relaxation bef

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7

Chakrabarti, Bikas K., Amit Dutta, Gabriel Aeppli, Uma Divakaran, and Thomas F. Rosenbaum. Quantum Phase Transitions in Transverse Field Spin Models: Genome Organization and Gene Expression Tools. University of Cambridge ESOL Examinations, 2015.

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8

Brezin, E. The Large N Expansion in Quantum Field Theory and Statistical Physics: From Spin Systems to 2-Dimensional Gravity. World Scientific Publishing Company, 1991.

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9

Brezin, E. The Large N Expansion in Quantum Field Theory and Statistical Physics: From Spin Systems to 2-Dimensional Gravity. World Scientific Pub Co Inc, 1991.

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10

E, Brézin, and Wadia S. R, eds. The Large N expansion in quantum field theory and statistical physics: From spin systems to 2-dimensional gravity. Singapore: World Scientific, 1993.

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Capitoli di libri sul tema "Quantum spin models"

1

Parkinson, John B., and Damian J. J. Farnell. "Spin Models." In An Introduction to Quantum Spin Systems, 7–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13290-2_2.

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2

Grosse, Harald. "Spin Systems." In Models in Statistical Physics and Quantum Field Theory, 13–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83504-9_2.

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3

Wipf, Andreas. "Classical Spin Models: An Introduction." In Statistical Approach to Quantum Field Theory, 101–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33105-3_6.

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4

Gunn, J. M. F., and M. A. Brackstone. "Quantum Disordered Spin Models and Bose Condensation." In Springer Proceedings in Physics, 130–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73554-7_22.

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5

Ramkarthik, M. S., and Payal D. Solanki. "One-Dimensional Spin Chain Models in Condensed Matter Theory." In Numerical Recipes in Quantum Information Theory and Quantum Computing, 297–334. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003164678-6.

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6

Szlachányi, K. "Order-Disorder Quantum Symmetry in G-Spin Models." In NATO ASI Series, 213–20. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1612-9_19.

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7

Bishop, R. F., J. B. Parkinson, and Yang Xian. "Quantum Spin Lattice Models: A Coupled-Cluster Treatment." In Condensed Matter Theories, 37–62. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3686-4_3.

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8

De Pietri, R. "Canonical “Loop” Quantum Gravity and Spin Foam Models." In Recent Developments in General Relativity, 43–61. Milano: Springer Milan, 2000. http://dx.doi.org/10.1007/978-88-470-2113-6_6.

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9

Gräfe, Wolfgang. "Regard to the Spin in the Foregoing Texts." In Quantum Mechanical Models of Metal Surfaces and Nanoparticles, 73. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19764-7_10.

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10

Evertz, H. G., and M. Marcu. "Vertex Models and Quantum-Spin Systems: A Nonlocal Approach." In Springer Proceedings in Physics, 109–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78448-4_10.

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Atti di convegni sul tema "Quantum spin models"

1

Fairbairn, Winston, John Barrett, Rachel Dowdall, Frank Hellmann, and Roberto Pereira. "Asymptotic analysis of Lorentzian spin foam models." In 3rd Quantum Gravity and Quantum Geometry School. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.140.0009.

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2

MIKOVIĆ, A. "SPIN FOAM MODELS OF QUANTUM GRAVITY." In Perspectives of the Balkan Collaborations. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812702166_0007.

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3

Fairbairn, Winston, and Catherine Meusburger. "Quantum deformation of two four-dimensional spin foam models." In 3rd Quantum Gravity and Quantum Geometry School. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.140.0017.

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4

MICHALSKI, MIłOSZ. "DETECTING ENTANGLEMENT IN SPIN LATTICE MODELS." In From Quantum Information to Bio-Informatics. WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814304061_0019.

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5

Stroganov, Yuri, and F. C. Alcaraz. "Free fermion branches in some quantum spin models." In Workshop on Integrable Theories, Solitons and Duality. Trieste, Italy: Sissa Medialab, 2002. http://dx.doi.org/10.22323/1.008.0037.

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6

OECKL, ROBERT. "RENORMALIZATION FOR SPIN FOAM MODELS OF QUANTUM GRAVITY." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0321.

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7

Kim, Minhyuk, Kangheun Kim, and Jaewook Ahn. "Atomic Quantum Wires in Ising-spin Chain Models." In CLEO: QELS_Fundamental Science. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cleo_qels.2021.sth1d.5.

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8

Brodin, Gert, Mattias Marklund, Jens Zamanian, Bengt Eliasson, and Padma K. Shukla. "Spin Kinetic Models of Plasmas—Semiclassical and Quantum Mechanical Theory." In NEW DEVELOPMENTS IN NONLINEAR PLASMA PHYSICS: Proceedings of the 2009 ICTP Summer College on Plasma Physics and International Symposium on Cutting Edge Plasma Physics. AIP, 2009. http://dx.doi.org/10.1063/1.3266806.

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9

Vitale, Patrizia. "A field-theoretic approach to Spin Foam models in Quantum Gravity." In Corfu Summer Institute on Elementary Particles and Physics - Workshop on Non Commutative Field Theory and Gravity. Trieste, Italy: Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.127.0032.

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10

Civalleri, P. P., M. Gilli, and M. Bonnin. "Circuit Models for Small Signal Performance of Spin 1/2 Quantum Systems." In 2006 Sixth IEEE Conference on Nanotechnology. IEEE, 2006. http://dx.doi.org/10.1109/nano.2006.247802.

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Rapporti di organizzazioni sul tema "Quantum spin models"

1

Vuletic, Vladan, and Mikhail Lukin. Quantum Simulation: From Spin Models To Gauge-Gravity Correspondence. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1756897.

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Thywissen, Joseph H. Towards Quantum Simulation of the 2D Fermi Hubbard Model - Development of a Local Probe of Density and Spin Ordering. Fort Belvoir, VA: Defense Technical Information Center, October 2013. http://dx.doi.org/10.21236/ada594773.

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