Article
Physics, Multidisciplinary
Yijia Wu, Hua Jiang, Hua Chen, Haiwen Liu, Jie Liu, X. C. Xie
Summary: Spin superconductors are exciton condensates that exhibit specific topological bound states with non-Abelian braiding statistics. These bound states, bound with electric flux gradients, are experimentally more distinct than Majorana zero modes as they are electrically charged.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Zhi-Xing Lin, Yijia Wu, X. C. Xie
Summary: We theoretically demonstrate that non-Abelian braiding operations can be achieved through scattering between chiral Dirac edge modes in quantum anomalous Hall insulators. We propose a viable device for experimental realization and detection of these operations.
Article
Physics, Applied
Ryo Ogawa, Tatsunori Okada, Hideyuki Takahashi, Fuyuki Nabeshima, Atsutaka Maeda
Summary: A new microwave Hall effect measurement method was developed using a cross-shaped bimodal cavity for materials in the skin depth region at low temperatures. The validity of the method was confirmed by measuring the Hall effect in metallic Bi single crystals, showing that the microwave Hall angles coincide with the DC Hall angle. This method opens a new approach to discussing the Hall effect in condensed matter physics.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Nick Abboud, Varsha Subramanyan, Xiao-Qi Sun, Guang Yue, Dale Van Harlingen, Smitha Vishveshwara
Summary: In this study, we characterize the topological features of Josephson junctions formed by coupled mesoscopic chiral p-wave superconducting islands. We identify localized Majorana bound states in Josephson vortices and demonstrate the existence of extended Majorana bound states around the outer perimeter of the coupled islands. These features have significant effects on the Josephson supercurrent and phase dynamics of the junction. We also discuss possible schemes to braid Majorana bound states in a trijunction geometry.
Article
Optics
Chong He, Cheng Zhou, Qian Zhou, Shiyi Xie, Mengzhe Xiao, Jiajun Tian, Yong Yao
Summary: A fiber-optic sensor for simultaneous measurement of strain and temperature is proposed, based on FP interference and AR mechanism. The sensor shows high temperature sensitivity and strain sensitivity, indicating stability and reliability in measurements.
CHINESE OPTICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Zhiyuan Li, Shuang Wang, Junfeng Jiang, Mei Sang, Yin Yu, Wenyan Liu, Peng Zhang, Tiegen Liu
Summary: This paper proposes a novel method for real-time pressure measurement based on rapid phase demodulation of multi-cavities Fabry-Perot (F-P) sensor, which effectively reduces the influence of irrelevant cavities and is suitable for real-time demodulation of sensors with multiple cavities. Experimental results demonstrate the method's capability of real-time demodulation of MEMS sensors and measurement of pressure in the range of 110 kPa to 200 kPa, with a demodulation rate of 5 kHz.
IEEE SENSORS JOURNAL
(2021)
Article
Physics, Mathematical
Lachezar S. Georgiev
Summary: This study analytically derives the full modular S matrix for Z(k) parafermion quantum Hall droplets using the decomposition of rational conformal field theory characters. The precise neutral-part parafermion S matrix is obtained from explicit relations between coset matrices, and the results are expected to play a crucial role in identifying interference patterns of fractional quantum Hall states and nondestructive interference measurement of Fibonacci anyons.
JOURNAL OF GEOMETRY AND SYMMETRY IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Amrita Ghosh, Eytan Grosfeld
Summary: This study investigates the phases of hard-core bosons with weak topological insulator characteristics, highlighting their behavior at different densities. Results show the potential for experimental realization of both weak topological insulators at 1/4 and 3/4 densities, as well as charge-density-wave insulators at 1/2 filling, providing new directions for optical lattice experiments.
Article
Physics, Multidisciplinary
Abhishek Kumar, Gerardo Ortiz, Philip Richerme, Babak Seradjeh
Summary: This paper introduces the concept of a Floquet gauge pump, which utilizes a dynamically engineered Floquet Hamiltonian to uncover the inherent degeneracy of the ground state in interacting systems. Demonstrated in a one-dimensional XY model, the Floquet Hamiltonian in the high-frequency limit consists of static XY and dynamically generated DMI terms. The dynamically generated magnetization current depends on the phases of complex coupling terms, distinguishing between ordered and disordered phases.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yantao Li, Adam Eaton, H. A. Fertig, Babak Seradjeh
Summary: We have discovered a new type of magic-angle phenomena when an AA-stacked graphene bilayer is twisted relative to another graphene system with band touching. At certain angles, multiple anisotropic Dirac cones coexist in the twisted multilayer structures, which we refer to as Dirac magic. The twist angle and perpendicular electric field can be used to tune the topological Lifshitz transitions induced by the anisotropy of the Dirac cones.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Paul Brookes, Tikai Chang, Marzena Szymanska, Eytan Grosfeld, Eran Ginossar, Michael Stern
Summary: Symmetry considerations play a crucial role in understanding the fundamental laws of nature and can protect quantum information from relaxation and decoherence.
PHYSICAL REVIEW APPLIED
(2022)
Article
Quantum Science & Technology
Daniel Dahan, Geva Arwas, Eytan Grosfeld
Summary: This study investigates the dissipative Bose-Hubbard model with chiral drive on a small ring of sites, exploring its long-time dynamical structure using mean-field equations and simulating the quantum master equation. The findings reveal that for sufficiently large drivings, the system exhibits a chaotic attractor at the mean-field level, presenting as a complex Wigner function at the quantum level. This behavior can be observed through the measurement of various bosonic correlation functions.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Multidisciplinary
Shimon Arie Haver, Eran Ginossar, Sebastian E. de Graaf, Eytan Grosfeld
Summary: This study explores the potential of superconducting resonators as detectors for topological insulator nanowires by generating orbital resonances through the introduction of static and oscillating electromagnetic fields. The changes in the resonator's Q-factor as a function of the flux reveal the density of states, transition rules, and dependence on the applied flux of the surface 2D Dirac orbitals in the topological insulator nanowire.
COMMUNICATIONS PHYSICS
(2023)
Article
Physics, Multidisciplinary
Devendra Singh Bhakuni, Amrita Ghosh, Eytan Grosfeld
Summary: This study explores the effect of many-body interactions in mirror-symmetry protected topological crystalline insulators. It demonstrates the stability of the mirror-symmetry protected topological phase under short-range interactions and the interaction-induced topological phase transition when longer-range interactions are introduced.
SCIPOST PHYSICS CORE
(2022)
Article
Materials Science, Multidisciplinary
Adam Eaton, Yantao Li, H. A. Fertig, Babak Seradjeh
Summary: This study investigates the presence of flat bands in stacked graphene multilayers with small relative twist angles. The effect of Dirac point asymmetry and Fermi velocity differences between layers is considered. The results show that despite this asymmetry, the flat band phenomenon persists. The magic angles can be tuned by controlling the screening in the bilayer system or the twist angles of the outer layers in the tetralayer system. Notably, the quantitative values of the magic angles are increased in the models.
Article
Materials Science, Multidisciplinary
Ruchi Saxena, Eytan Grosfeld, Sebastian E. de Graaf, Tobias Lindstrom, Floriana Lombardi, Oindrila Deb, Eran Ginossar
Summary: We analyze the confinement of electronic surface states in a model of a topological insulator nanowire. We show that intentional backscattering can be induced in the presence of a nanowire constriction and propose a geometry involving two constrictions that form effective barriers for the formation of a quantum dot. By analyzing the noninteracting electronic transport through the device, we demonstrate how externally applied magnetic flux and electrostatic gates can control the spectrum of the quantum dot and the electronic transport through the surface states of the model device.
Article
Quantum Science & Technology
E. Lupo, E. Grosfeld, E. Ginossar
Summary: We propose a voltage gate-based method for controlling the Majorana transmon and analyze its performance in terms of qubit control errors and charge noise effects. The results show that the method achieves high-fidelity single-qubit rotation gates in both the laboratory frame and the qubit rotating frame. Furthermore, the system exhibits long dephasing times at the sweet spots and remarkable resilience to charge noise in the driven case.
Article
Physics, Multidisciplinary
V. Alan Kostelecky, Ralf Lehnert, Navin McGinnis, Marco Schreck, Babak Seradjeh
Summary: This paper proposes a correspondence between emergent Lorentz symmetry in condensed-matter systems and the effective field theory for Lorentz violation in fundamental theories of spacetime and matter. The consequences of this correspondence on the spectral and transport properties of Dirac and Weyl semimetals are investigated, and the bulk-boundary correspondence between bulk topological invariants and drumhead surface states of these semimetals is demonstrated.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Amrita Ghosh, Eytan Grosfeld
Summary: Through the use of QMC technique, it was discovered that hard-core bosons on the honeycomb lattice exhibit a dimer insulator phase near maximum anisotropy, characterized by a topological entanglement entropy ln(2)/2, indicative of a fractional quantum Hall state. The presence of edge states was identified, and a QMC-based method was derived to extract and verify their chirality, all without the need for magnetic flux or lattice frustration.
Article
Physics, Multidisciplinary
Yantao Li, H. A. Fertig, Babak Seradjeh
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
D. Dahan, E. Grosfeld, B. Seradjeh
Article
Materials Science, Multidisciplinary
Abhishek Kumar, M. Rodriguez-Vega, T. Pereg-Barnea, B. Seradjeh
