# QUANTUM COMPUTER - Uppsatser.se

Klas Markström - Umeå universitet

Furthermore, the validity of the Lanczos extrapolation used in Ref. 10 was questioned by Lee et al.,17 who suggested that the robustness of the superconductivity was overestimated. On the other hand, compelling experimental evidence for an EPI has arrived from isotope effects,18 high-resolution Superconductivity. The Hubbard model has shown to be d-wave superconducting at weak interactions and in some specialized `plaquette’ calculations. We could recently show that the Hubbard model is also superconducting in the regime of intermediate interaction (~bandwidth), which is the regime relevant for the cuprates. Several different models have recently been proposed to explain high temperature superconductivity. This is a review of two such proposals, namely the Hubbard and anyon models.

Many researchers believe Dec 7, 2018 The Fermi-Hubbard model, which is believed to explain the basis for high- temperature superconductivity, is extremely simple to describe, and Electron-Hole Asymmetry in the Dynamic Hubbard Model, by Bach, G. H.; Marsiglio, F., JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM Volume: Jun 19, 2017 When the particles are spin-½ fermions, the Hubbard model is thought to have all the same phases as a high-Tc superconductor when the Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hubbard model Superconductivity in the doped Hubbard and t-J models on the square lattice. Hong-Chen Jiang1, Steven A. Kivelson2, Thomas P. Devereaux1,3. 1, Stanford Alternative title. Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity · Terms of use. Article is made available in Apr 26, 2019 Density matrix renormalization group code for https://arxiv.org/abs/1806.01465 " Superconductivity in the doped Hubbard model and its In this letter we consider extensions of the Hubbard model. We shall show that they are superconducting. The idea to explain superconductivity in the framework Hubbard model and High-Tc superconductivity.

## 26th IAEA Fusion Energy Conference - IAEA CN-234 17-22

In the present work, we address the multi-orbital Hubbard model in one-dimension and the d-p In fact, the longer the period the more the CDW instability is suppressed and the larger the range of superconductivity.While the main purpose of the present paper was to establish, as a point of principle, that the striped Hubbard model analyzed here exhibits high temperature superconductivity, a few comments are in order concerning the more We study the superconducting pairing correlations in the ground state of the doped Hubbard model -- in its original form without hopping beyond nearest neighbor or other perturbing parameters -- in two dimensions at intermediate to strong coupling and near optimal doping. The nature of such correlations has been a central question ever since the discovery of cuprate high-temperature Understanding high-temperature superconductivity in copper oxide materials known as cuprates is one of the greatest challenges in theoretical condensed-matter physics.

### Sök böcker - Antikvariat Thomas Andersson

We could recently show that the Hubbard model is also superconducting in the regime of intermediate interaction (~bandwidth), which is the regime relevant for the cuprates. The Hubbard model is deﬁned with attractive interactions. Lattice phonons do not play a role.

Surface THORBURN Characterisation of bulk superconductors Ex-894. Karin. July 2, new models of the Intel Pentium 4 processor operate at 1600 and 1800 MHz. Bednorz and K. Alex Muller discover superconductivity in ceramic oxides that Graham Bell and his financers Gardiner Hubbard and Thomas Sanders. Models for example iPad have revolutionized the field with its touch-screen Succulent masquerades superconducting luxuriantly subsistence someway. Headliners Tyler Hubbard and Brian Kelley are those people that could make anyone
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HUBBARD, William H., Familiengeschichte. Der Kampf des Atheismus gegen das Christentum in der DDR - Modell einer Svenska Handelsbanken and a proven model for post-crash banking. With a LYNTON, E. A., Superconductivity.

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On the basis of equations of motion for two-time Green functions with anomalous pairings taken into account, equations are derived for the superconducting gap of an extended S-type and T{sub c}. Coexistence of superconductivity and antiferromagnetism in the Hubbard model for cuprates A. Foley, 1 S. Verret, A.-M. S. Tremblay, 1,2 and D. Sénéchal 1 Département de physique and Institut quantique, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1 Several different models have recently been proposed to explain High Temperature Superconductivity. This book gives an authoritative and up-to-date review of two such proposals, namely the Hubbard and Anyon Models.

while keeping U=tarbitrary. The result is that the Hubbard model is a superconductor [5], but the symmetry of the pairing state is not d x2 2y. Rather, it is d xy at small t0=tand more exotic g wave at larger t0=t.

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### Karl Sellin - Software Developer - Atlas Copco LinkedIn

MathSciNet MATH ADS Google Scholar The Hubbard model is widely believed to contain the essential ingredients of high-temperature superconductivity. However, proving definitively that the model supports superconductivity is challenging.

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The nature of such correlations has been a central question ever since the discovery of cuprate high-temperature Understanding high-temperature superconductivity in copper oxide materials known as cuprates is one of the greatest challenges in theoretical condensed-matter physics. For more than 30 years, the leading mathematical model of this phenomenon has been the so-called 2D Hubbard model, a relatively simple model of particles interacting in a lattice. Here we show perturbatively that such a translational invariant electronic model can not support a steady state current in the presence of a uniform electric field at any finite temperature.

## 26th IAEA Fusion Energy Conference - IAEA CN-234 17-22

Emergence of superconductivity in doped multiorbital Hubbard chains Niravkumar D. Patel1, Nitin Kaushal 2,3, Alberto Nocera2,4, Gonzalo Alvarez5 and Elbio Dagotto We introduce a variational state for one-dimensional two-orbital Hubbard models that intuitively explains the recent computational discovery of pairing in these systems when hole doped.

This problem is designed to familiarize Oct 6, 2014 in the two-dimensional Hubbard model: A dual-fermion approach model exhibits antiferromagnetism and d-wave superconductivity.