Article
Physics, Multidisciplinary
Jiaqi Hu, Zhaorong Wang, Seonghoon Kim, Hui Deng, Sebastian Brodbeck, Christian Schneider, Sven Hofling, Nai H. Kwong, Rolf Binder
Summary: By using a microcavity with strong polarization selectivity, researchers observed a fermionic gain mechanism underlying polariton laser, which is consistent with an open-dissipative-pumped system analog of a polaritonic BCS state.
Article
Physics, Multidisciplinary
P. Solinas, A. Amoretti, F. Giazotto
Summary: Since the 1960s, a deep and surprising connection between the development of superconductivity and quantum field theory has emerged, with examples such as the Anderson-Higgs mechanism and similarities between different equations. This parallelism predicts the superconducting Sauter-Schwinger effect, where electrostatic fields can create coherent excitations from the superconducting ground-state condensate. This phenomenon sheds light on the interaction between superconductors and electric fields and suggests a method for experimental verification.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Anirban Sharma, Songyang Pu, J. K. Jain
Summary: Research suggests that there is no pairing evidence for filling factor nu = 1/2, but clear evidence for pairing at nu = 5/2. The optimization of parameters leads to the highest overlap between the exact Coulomb ground state at nu = 5/2 and the BCS state, supporting composite-fermion pairing as the mechanism for the 5/2 fractional quantum Hall effect.
Article
Multidisciplinary Sciences
Daniel K. Hoffmann, Vijay Pal Singh, Thomas Paintner, Manuel Jaeger, Wolfgang Limmer, Ludwig Mathey, Johannes Hecker Denschlag
Summary: Researchers demonstrate the variation of second sound wave in the crossover from Bose-Einstein condensate to Bardeen-Cooper-Schrieffer superfluid using ultracold fermionic Li-6 atoms with tunable interactions. The speed of second sound varies only slightly in this crossover regime, providing deeper insight into the propagation of sound waves. The measurement results are compared with classical-field simulations to aid in the interpretation of experiments.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Francesco Romeo
Summary: We propose a real-space version of the Bardeen-Cooper-Schrieffer interaction to investigate the interplay between many-body physics and particle confinement on a quantum graph. For the two-body problem, the two-particle wavefunction is found to satisfy an integro-differential Schrodinger equation. The solution reveals the existence of a stable bound state that is enhanced in graphs with specific topology. The enhancement effect is shown to be robust against many-body effects, as demonstrated by the Richardson exact solution. This suggests that effective pairing interaction can be enhanced in quantum graphs with appropriate connectivity. Experimental evidences in Josephson junctions arrays are discussed in connection with the microscopic mechanism described in this work.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Multidisciplinary
Robert J. Lewis-Swan, Diego Barberena, Julia R. K. Cline, Dylan J. Young, James K. Thompson, Ana Maria Rey
Summary: The proposal suggests simulating dynamical phases of a BCS superconductor using cold atoms trapped in an optical cavity, with effective Cooper pairs encoded via internal states of the atoms and attractive interactions realized through the exchange of virtual photons. By controlling the interaction strength and dispersion relation of the effective Cooper pairs, exploration of the full dynamical phase diagram of the BCS model is enabled. This proposal opens the door for studying the nonequilibrium features of quantum magnetism and superconductivity through atom-light interactions in cold atomic gases.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yuta Mizukami, Masahiro Haze, Ohei Tanaka, Kohei Matsuura, Daiki Sano, Jakob Boeker, Ilya Eremin, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi
Summary: The authors use FeSe1-xSx to investigate the evolution of the superconducting state in the BCS-BEC crossover regime and observe the multiband nature of the crossover, as well as a suppression of the nematic order upon S-substitution. Recent experiments suggest that investigations into the BCS-BEC crossover may be possible using strongly correlated systems, in addition to ultracold atomic systems.
COMMUNICATIONS PHYSICS
(2023)
Article
Physics, Multidisciplinary
Je Huan Koo
Summary: The high-transition temperatures of cuprate and pnictide superconductors can be explained by a different distribution of electrons, potentially involving resonance between superconducting electrons and independent charge density waves (CDWs) under the traditional BCS scheme.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Multidisciplinary
Matthew Rogers, Alistair Walton, Machiel G. Flokstra, Fatma Al Ma'Mari, Rhea Stewart, Stephen L. Lee, Thomas Prokscha, Andrew J. Caruana, Christian J. Kinane, Sean Langridge, Harry Bradshaw, Timothy Moorsom, Mannan Ali, Gavin Burnell, Bryan J. Hickey, Oscar Cespedes
Summary: The combination of magnetic molecules with a metallic substrate allows for the manipulation of molecular spin properties and potential application in low-power information storage devices. Research demonstrates the feasibility of achieving spin-ordering and superconducting properties at the metallo-molecular interface, enabling lower energy spin transfer and magnetic switching in quantum computing and information storage. The results showcase the potential of metallo-molecular interfaces for singlet to triplet Cooper pair conversion, offering a new capability for generating and controlling the diffusion of spin polarized dissipationless currents.
COMMUNICATIONS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Israel Chavez, Marcela Grether, Manuel de Llano
Summary: The superfluid density of a superconductor is calculated using the generalized Bose-Einstein condensation theory, considering two special cases. The results show a linear relationship between temperature and superfluid density in the strong-coupling regime, while in the weak-coupling regime, the results agree with experimental data.
SN APPLIED SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
D. A. Mayoh, A. D. Hillier, G. Balakrishnan, M. R. Lees
Summary: The study presents evidence of time-reversal symmetry breaking (TRSB) and Bardeen-Cooper-Schrieffer (BCS)-like superconductivity in noncentrosymmetric La7Pd3, suggesting implications for other CS and NCS superconductors where TRSB has been observed.
Article
Materials Science, Multidisciplinary
Fedor Simkovic, Youjin Deng, Evgeny Kozik
Summary: This study investigates the superfluid instability in the 2D Hubbard model using a nonperturbative approach and maps out the superfluid ground-state phase diagram under various parameter ranges. The phase diagram undergoes dramatic transformations in different regions, showing rich physical phenomena under different parameter conditions.
Article
Physics, Multidisciplinary
H. P. Ojeda Collado, Gonzalo Usaj, C. A. Balserio, Damian H. Zanette, Jose Lorenzana
Summary: We present a systematic study of the dynamical phase diagram of a periodically driven BCS system. Three different driving mechanisms are considered and compared. We identify the locus in parameter space of parametric resonances and four dynamical phases. By mapping the BCS problem to a collection of nonlinear and interacting classical oscillators, we shed light on the origin of time-crystal phases and parametric resonances.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ramon Carbo-Dorca, Debraj Nath
Summary: The present paper provides a quantum mechanical study of Cooper pairs by considering the correct spin of the Fermion pair. The theory is built upon describing each particle with an appropriate Gaussian function to transform them into quantum mechanical objects. By constructing a new orthonormalized basis set with suitable symmetry, the two-particle spin functions and energies can be easily determined. Additionally, a harmonic oscillator term can be added to stabilize the initial Hamiltonian expectation values when the particle energies become repulsive. The results demonstrate the straightforward extension of describing Cooper pairs to N Fermion particles based on the developed theory.
JOURNAL OF MATHEMATICAL CHEMISTRY
(2023)
Article
Physics, Mathematical
Filipp N. Rybakov, Egor Babaev
Summary: The article discussed the Gor'kov microscopic derivation and extension of the GL model, investigating whether the extended GL model can describe local minima solutions of superconducting states.
JOURNAL OF MATHEMATICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Tommaso Caneva, Marco T. Manzoni, Tao Shi, James S. Douglas, J. Ignacio Cirac, Darrick E. Chang
NEW JOURNAL OF PHYSICS
(2015)
Article
Optics
Tao Shi, Darrick E. Chang, J. Ignacio Cirac
Article
Optics
A. Beyer, L. Maisenbacher, A. Matveev, R. Pohl, K. Khabarova, Y. Chang, A. Grinin, T. Lamour, T. Shi, D. C. Yost, Th. Udem, T. W. Haensch, N. Kolachevsky
Article
Physics, Multidisciplinary
Tao Shi, Ying-Hai Wu, A. Gonzalez-Tudela, J. I. Cirac
Article
Multidisciplinary Sciences
T. Shi, H. J. Kimble, J. I. Cirac
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2017)
Article
Physics, Multidisciplinary
Tao Shi, Eugene Demler, J. Ignacio Cirac
Article
Physics, Multidisciplinary
Tao Shi, Yue Chang, Juan Jose Garcia-Ripoll
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Multidisciplinary
Yuto Ashida, Tao Shi, Mari Carmen Banuls, J. Ignacio Cirac, Eugene Demler
PHYSICAL REVIEW LETTERS
(2018)
Article
Optics
Carlos Navarrete-Benlloch, Eugenio Roldan, Yue Chang, Tao Shi
Article
Optics
Tao Shi, Su Yi
Correction
Physics, Multidisciplinary
T. Shi, S. -H. Zou, H. Hu, C. -P. Sun, S. Yi
PHYSICAL REVIEW LETTERS
(2014)
Article
Materials Science, Multidisciplinary
Yuto Ashida, Tao Shi, Mari Carmen Banuls, J. Ignacio Cirac, Eugene Demler
Article
Materials Science, Multidisciplinary
Marton Kanasz-Nagy, Yuto Ashida, Tao Shi, Catalin Pascu Moca, Tatsuhiko N. Ikeda, Simon Folling, J. Ignacio Cirac, Gergely Zarand, Eugene A. Demler
Article
Materials Science, Multidisciplinary
Ying-Hai Wu, Tao Shi, G. J. Sreejith, Zheng-Xin Liu
Article
Materials Science, Multidisciplinary
Ying-Hai Wu, Tao Shi