Article
Materials Science, Multidisciplinary
Alfonso Maiellaro, Francesco Romeo, Fabrizio Illuminati
Summary: In this study, the properties of one-dimensional topological superconductors under various boundary effects were investigated, with particle-hole and reflection symmetries being broken or preserved by fixing boundary parameters. The robustness of edge modes was assessed using different quantifiers of topological properties, such as long-distance quantum mutual information and squashed entanglement. The results may offer guidance for embedding low-dimensional topological systems on nanodevices in realistic conditions.
Article
Materials Science, Multidisciplinary
D. Perez Daroca, A. A. Aligia
Summary: In this study, the phase diagram of a model for topological superconducting wires with local s-wave pairing, spin-orbit coupling, and magnetic field with arbitrary orientations was calculated. It was found that in addition to the topological gapped phase, a gapless superconducting phase appears when the directions of spin-orbit coupling and magnetic field are not perpendicular.
Article
Materials Science, Multidisciplinary
Leonid Burlachkov, Nikita Fuzailov
Summary: The study identifies two competing regimes of ac magnetic response in current-carrying type-II superconducting wires, with the appearance of an out-of-phase peak in voltage being attributed to the inhibitory effect of zero-field lines on flux motion. The phase diagram constructed enables the distinction between in-phase and out-of-phase regimes.
Article
Nanoscience & Nanotechnology
Yuan Feng, Jun-Tong Ren, Sha-Sha Ke, Hai-Feng Lu
Summary: In this paper, a scheme is proposed to distinguish Majorana bound states (MBSs) and trivial Andreev bound states (ABSs) by applying a local potential barrier. The authors find that MBSs appear at the sides of the potential barrier, indicating their topological nature, while ABSs are not induced by the local potential barrier. The conductance spectrum is found to evolve differently for MBSs and ABSs under varying potential strength.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Optics
Qi-Ping Su, Yu Zhang, Liang Bin, Chui-Ping Yang
Summary: Compared with a qubit, a qudit provides a larger Hilbert space for information storage and processing. This work proposes a simple method to realize a hybrid quantum controlled-sum gate using a superconducting qutrit and a cat-state qutrit, forming a universal set of ternary logic gates for quantum computing with qutrits. The proposal is based on circuit QED and employs a dispersive coupling between a superconducting ququart and a microwave cavity. The gate operation is simple and does not require classical pulse or measurement. The feasibility of generating a hybrid maximally entangled state and its experimental implementation are also discussed.
Article
Physics, Condensed Matter
Beibing Huang, Xiaosen Yang, Qinfang Zhang, Ning Xu
Summary: This paper investigates the effects of s-wave superconducting pairings on the multilayers of an antiferromagnetic topological insulator (AFTI). It is found that when the local Chern numbers are dominated by the surface layers, the wavefunctions of chiral Majorana edge modes do not localize on the surface layers. In addition, the paper also studies the superconducting vortex phase transition and the role of the exchange field in enhancing the topological stability of the system.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Mathematics, Applied
Chris Bourne, Yoshiko Ogata
Summary: This paper introduces an index for symmetry-protected topological (SPT) phases of infinite fermionic chains with an on-site symmetry given by a finite group G, and shows that this index is an invariant of the classification of SPT phases. It also derives a fermionic matrix product representative with on-site symmetry for ground states that are translation invariant and have density matrices with uniformly bounded rank on finite intervals.
FORUM OF MATHEMATICS SIGMA
(2021)
Article
Materials Science, Multidisciplinary
Robert A. Jones, Max A. Metlitski
Summary: This paper investigates the boundary problem of root SPT phase with symmetry group G = Z(2) x Z(2)(f) in (2+1)D fermion SPTs. By processing the bulk model, it derives a one-dimensional lattice model for the boundary and finds that it realizes an Ising conformal field theory with a stable gapless boundary state.
Article
Physics, Multidisciplinary
Fu-Bin Yang
Summary: The study investigates the coupling of serial double quantum dots with topological superconducting wires hosting Majorana bound states, calculating the transmission property and differential conductance. Different lead-polarization lines and Fano lines were observed with variable dot Majorana coupling and phase, providing insights into the interaction between these entities.
Article
Quantum Science & Technology
D. M. Tennant, X. Dai, A. J. Martinez, R. Trappen, D. Melanson, M. A. Yurtalan, Y. Tang, S. Bedkihal, R. Yang, S. Novikov, J. A. Grover, S. M. Disseler, J. Basham, R. Das, D. K. Kim, A. J. Melville, B. M. Niedzielski, S. J. Weber, J. L. Yoder, A. J. Kerman, E. Mozgunov, D. A. Lidar, A. Lupascu
Summary: In this study, the properties of a spin chain implemented with superconducting flux circuits are explored, serving as a connectivity medium between two superconducting qubits. The experiment demonstrates that the chain has long-range, cross-chain correlations and enables interactions between the two end qubits mediated by the coupler chain. This work is of direct relevance to near term quantum annealing processors for generating long-range, coherent coupling between qubits.
NPJ QUANTUM INFORMATION
(2022)
Article
Astronomy & Astrophysics
Yunfeng Chen, Qingjuan Yu, Youjun Lu
Summary: In this study, the correlations between stellar consumption rates and the mass of massive black holes (MBHs) and the inner slope of the host-galaxy mass density distribution & alpha; were investigated. A simplified analytical power-law model was introduced to estimate the rates, which were found consistent with numerical results. The origin of the correlations was explained by the dependence of the model on MBH/host-galaxy properties and the separation of the stellar angular momentum evolution mechanisms.
ASTROPHYSICAL JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yi-Ping Wang, Wei Wang, Lang Liu, Zhi-Yong Zheng, Meng -En Du
Summary: We theoretically study the topological properties in a one-dimensional superconducting circuit lattice and analyze the energy spectrum and edge states. The number of lattices affects the topological characteristics and the inversion of the edge state distribution can be realized. Considering the effects of defects, dissipation, and disorder, we find that they impact the system but the edge state remains stable due to topological protection.
RESULTS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Wang Wei, Wang Yi-Ping
Summary: This article proposes a theoretical scheme for a one-dimensional lattice based on a superconducting quantum circuit system. The energy spectrum, topological properties, and the influence of next-nearest-neighbor interactions and defects are investigated. The research results have implications for designing new quantum devices for quantum optics and quantum information processing.
ACTA PHYSICA SINICA
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Reyhaneh Nosrati, Mukund Balasubramanian, Robert Mulkern
Summary: The study compared transverse relaxation rates of brain metabolites estimated from single-TE PRESS acquisitions with more conventionally derived rates estimated from multiple-TE PRESS acquisitions. The results showed that for major brain metabolite singlets, R-2Hahn values had high correlations with R-2 values estimated from a single TE method.
MAGNETIC RESONANCE IN MEDICINE
(2021)
Article
Multidisciplinary Sciences
Shujie Cheng, Yufei Zhu, Xianlong Gao
Summary: A modified real-space-Pfaffian method was used to characterize the topological superconducting transition in a one-dimensional p-wave superconductor with quasiperiodic potentials. It was found that Majorana zero-energy mode exists in the topological non-trivial phase, localized at the ends of the system. Additionally, numerical analysis revealed mobility edges in the energy spectra due to competition between localized quasi-disorder and extended p-wave pairing.
Article
Physics, Multidisciplinary
P. Schad, Yu. Makhlin, B. N. Narozhny, G. Schoen, A. Shnirman
Article
Physics, Multidisciplinary
J. E. Mooij, G. Schoen, A. Shnirman, T. Fuse, C. J. P. M. Harmans, H. Rotzinger, A. H. Verbruggen
NEW JOURNAL OF PHYSICS
(2015)
Article
Materials Science, Multidisciplinary
Nicolas Vogt, Roland Schaefer, Hannes Rotzinger, Wanyin Cui, Andreas Fiebig, Alexander Shnirman, Alexey V. Ustinov
Article
Physics, Multidisciplinary
A. Shnirman, A. Saha, I. S. Burmistrov, M. N. Kiselev, A. Altland, Y. Gefen
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2016)
Article
Physics, Multidisciplinary
N. Vogt, J. H. Cole, A. Shnirman
NEW JOURNAL OF PHYSICS
(2016)
Article
Physics, Multidisciplinary
Karin Cedergren, Roger Ackroyd, Sergey Kafanov, Nicolas Vogt, Alexander Shnirman, Timothy Duty
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
Juergen Lisenfeld, Alexander Bilmes, Shlomi Matityahu, Sebastian Zanker, Michael Marthaler, Moshe Schechter, Gerd Schoen, Alexander Shnirman, Georg Weiss, Alexey V. Ustinov
SCIENTIFIC REPORTS
(2016)
Article
Materials Science, Multidisciplinary
M. Bard, I. V. Protopopov, I. V. Gornyi, A. Shnirman, A. D. Mirlin
Article
Materials Science, Multidisciplinary
Philip Wollfarth, Yasuhiro Utsumi, Alexander Shnirman
Article
Materials Science, Multidisciplinary
Shlomi Matityahu, Juergen Lisenfeld, Alexander Bilmes, Alexander Shnirman, Georg Weiss, Alexey V. Ustinov, Moshe Schechter
Article
Materials Science, Multidisciplinary
Dmitriy S. Shapiro, D. E. Feldman, Alexander D. Mirlin, Alexander Shnirman
Article
Materials Science, Multidisciplinary
Tim Ludwig, Igor S. Burmistrov, Yuval Gefen, Alexander Shnirman
Article
Materials Science, Multidisciplinary
Pablo Schad, Alexander Shnirman, Yuriy Makhlin
Article
Materials Science, Multidisciplinary
Shlomi Matityahu, Alexander Shnirman, Gerd Schoen, Moshe Schechter
Article
Materials Science, Multidisciplinary
Dmitriy S. Shapiro, Alexander Shnirman, Alexander D. Mirlin