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AbstractAbstract
[en] The authors consider a model of superconducting pairing with a gap function that is odd in k-kF. In this case superconductivity is possible even in the presence of arbitrarily strong point repulsion between electrons, which is an attractive feature from the viewpoint of the theory of high-Tc metal oxides. The authors suggest a model of pairing interaction in which the equations of the BCS theory can be solved exactly, which makes it possible to fully analyze the ranges of existence of ordinary (open-quotes evenclose quotes) and open-quotes oddclose quotes pairing in terms of the interaction parameters. The authors show that normal impurities (disorder) lead to extremely strong suppression of open-quotes oddclose quotes pairing, even stronger than magnetic impurities do in conventional superconductors
Source
Translated from Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki; 104: No. 4, 3550-3564(Oct 1993).
Record Type
Journal Article
Literature Type
Translation
Journal
Journal of Experimental and Theoretical Physics; ISSN 1063-7761;
; CODEN JXTPAS; v. 77(4); p. 692-699

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Lesinski, Thomas; Hebeler, K.; Duguet, Thomas C.; Schwenk, Achim
Oak Ridge National Laboratory (United States). Funding organisation: US Department of Energy (United States)2012
Oak Ridge National Laboratory (United States). Funding organisation: US Department of Energy (United States)2012
AbstractAbstract
[en] We present the first study of pairing in nuclei including three-nucleon forces. We perform systematic calculations of the odd-even mass staggering generated using a microscopic pairing interaction at first order in chiral low-momentum interactions. Significant repulsive contributions from the leading chiral three-nucleon forces are found. Two- and three-nucleon interactions combined account for approximately 70% of the experimental pairing gaps, which leaves room for self-energy and induced interaction effects that are expected to be overall attractive in nuclei.
Primary Subject
Source
AC05-00OR22725
Record Type
Journal Article
Journal
Journal of Physics. G, Nuclear and Particle Physics; ISSN 0954-3899;
; CODEN JPGPED; v. 39(1); p. 015108

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Klich, Israel, E-mail: isklich@gmail.com2014
AbstractAbstract
[en] We study trace formulas for the exponentials of general fermion bilinears, including pairing terms and including non-Hermitian forms. In particular, we give elementary derivations for determinant and Pfaffian formulae for such traces and use these to obtain general expressions for the full counting statistics in states associated with quadratic Hamiltonians, including BCS-like pairing terms and fermion parity in a prescribed region or set of modes. We also derive Pfaffian expressions for state overlaps and counting statistics in states built out of the vacuum by creation of pairs of particles. (paper)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/1742-5468/2014/11/P11006; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Statistical Mechanics; ISSN 1742-5468;
; v. 2014(11); [16 p.]

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Mota, R.; Lima, G.A.R.; Fazzio, A.
Proceedings of the 14. National Meeting on Condensed Matter Physics. v.21991
Proceedings of the 14. National Meeting on Condensed Matter Physics. v.21991
AbstractAbstract
[en] Published in summary form only
Original Title
Supercondutividade e modelo de par spin-polaron
Source
Sociedade Brasileira de Fisica, Sao Paulo, SP (Brazil); 201 p; 1991; p. 351; 14. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 7-11 May 1991
Record Type
Miscellaneous
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Conference
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AbstractAbstract
[en] This is a partly non-technical introduction to selected topics on tensor network methods, based on several lectures and introductory seminars given on the subject. It should be a good place for newcomers to get familiarized with some of the key ideas in the field, specially regarding the numerics. After a very general introduction we motivate the concept of tensor network and provide several examples. We then move on to explain some basics about Matrix Product States (MPS) and Projected Entangled Pair States (PEPS). Selected details on some of the associated numerical methods for 1d and 2d quantum lattice systems are also discussed. - Highlights: • A practical introduction to selected aspects of tensor network methods is presented. • We provide analytical examples of MPS and 2d PEPS. • We provide basic aspects on several numerical methods for MPS and 2d PEPS. • We discuss a number of applications of tensor network methods from a broad perspective
Primary Subject
Source
S0003-4916(14)00159-6; Available from http://dx.doi.org/10.1016/j.aop.2014.06.013; Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] In the years 1964-66 several physicists from several groups were searching quite independently for new symmetries related to the proton-neutron pairing interaction. They exploited the so-called quasi-spin method introduced earlier to apply to the system of electrons and then to identical nucleons (only protons or only neutrons). In what follows, a short introduction to the quasi-spin method is presented and then its application to the pairing interaction of neutrons (protons) is given. With the help of the quasi-spin method, the orthogonal symmetry groups SO(5) and SO(8) are shown to deal with proton-neutron pairing interaction in j - j and L - S coupling schemes, respectively. Comments about chronology of published papers related to the symmetry of pairing interaction written by inventors of the new symmetries are also made. (author)
Primary Subject
Source
13. Nuclear Physics Workshop ''Marie and Pierre Curie'': Pairing and beyond - 50 years of the BCS model; Kazimierz Dolny (Poland); 27 Sep - 1 Oct 2006; Available from DOI: http://dx.doi.org/10.1142/S021830130700534X
Record Type
Journal Article
Literature Type
Conference
Journal
International Journal of Modern Physics E; ISSN 0218-3013;
; v. 16(2); p. 199-209

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Sedrakian, Armen; Clark, J. W.; Krotscheck, Eckhard, E-mail: eckhardk@buffalo.edu2017
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Medina, Gerardo; Simonin, Jorge; Nunez Regueiro, Manuel.
Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina). Centro Atomico Bariloche1990
Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina). Centro Atomico Bariloche1990
AbstractAbstract
[en] The Gutzwiller approach to the repulsive Hubbard model is extended to the negative-U case. The repulsion-attraction transformation of the Hamiltonian is shown to be valid also for this particular mean field approximation. The physical meaning of the results is discussed. (Author)
Source
1990; 5 p; Available from Comision Nacional de Energia Atomica, Buenos Aires (AR). Library
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Report
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AbstractAbstract
No abstract available
Primary Subject
Source
International Centre for Theoretical Physics, Trieste (Italy); Trieste Univ. (Italy); Istituto Nazionale di Fisica Nucleare, Trieste (Italy); 241 p; Nov 1983; p. 201-202; Topical meeting on nuclear fluid dynamics; Trieste (Italy); 11-15 Oct 1982; Published in summary form only.
Record Type
Report
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Conference
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Lisin, E. A.; Vaulina, O. S.; Petrov, O. F., E-mail: eaLisin@yandex.ru2017
AbstractAbstract
[en] We propose a simple criterion for revealing the breaking of pair interaction symmetry in strongly coupled dissipative systems. The criterion is based on the analysis of correlations between the velocities of strongly interacting particles, which can be measured relatively easily in experiments with macroparticles in various media. We derive analytic relations that make it possible to calculate the derivatives of the interaction force between a pair of particles from the data on the correlations of their velocities and coordinates. The proposed criterion and relations are verified using the results of numerical simulation of the dynamics of dust particles in a plasma.
Primary Subject
Source
Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Experimental and Theoretical Physics; ISSN 1063-7761;
; CODEN JTPHES; v. 124(4); p. 678-682

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