Results 61 to 70 of about 197,846 (331)

Switchable quantum anomalous and spin Hall effects in honeycomb magnet EuCd2As2

New Journal of Physics, 2022
Creating and engineering the topological features of intrinsic magnets are essential for topological spintronic applications. Here, we propose a material platform to realize the switchable topological phase transition between quantum anomalous Hall (QAH)
Bingyang Li, Wenli Sun, Xiaorong Zou, Xinying Li, Baibiao Huang, Ying Dai, Chengwang Niu   +6 more
doaj   +1 more source

Hardness of Braided Quantum Circuit Optimization in the Surface Code

IEEE Transactions on Quantum Engineering, 2023
Large-scale quantum information processing requires the use of quantum error-correcting codes to mitigate the effects of noise in quantum devices.
Kunihiro Wasa, Shin Nishio, Koki Suetsugu, Michael Hanks, Ashley Stephens, Yu Yokoi, Kae Nemoto   +6 more
doaj   +1 more source

Zeeman-field-induced valley-dependent topological phase transitions on the surface of a topological crystalline insulator SnTe

New Journal of Physics, 2016
Mirror-symmetric (001) surfaces of a topological crystalline insulator SnTe host an even number of Dirac cone structures of surface states. A Zeeman field generically gaps the surface states, leading to a 2D topological insulator.
Wei Luo, W Y Deng, L Sheng
doaj   +1 more source

The Loschmidt Index

SciPost Physics, 2021
We study the nodes of the wavefunction overlap between ground states of a parameter-dependent Hamiltonian. These nodes are topological, and we can use them to analyze in a unifying way both equilibrium and dynamical quantum phase transitions in multi ...
Diego Liska, Vladimir Gritsev
doaj   +1 more source

Hyperbolic Topological Quantum Sources

Advanced Science
Robust Integrable Quantum Optical Sources, Constructed by Topological Boundary States, Are Crucial for the on‐chip Quantum Information Processing. However, Limited by the Bulk‐edge Correspondence, the Implementation of Topological Boundary Channels ...
Lu He, Lei Huang, Weixuan Zhang, Dongning Liu, Huizhen Zhang, Xue Feng, Fang Liu, Kaiyu Cui, Yidong Huang, Wei Zhang, Xiangdong Zhang   +10 more
doaj   +1 more source

Simulating and studying the topological properties of the photon-phonon coupled modes in a one-dimensional superconducting circuit lattice

Results in Physics, 2022
We theoretically study the topological properties in a one-dimensional superconducting circuit lattice, where each unit cell is composed of a superconducting microwave cavity, a nanomechanical resonator (NAMR) and a superconducting qubit.
Yi-Ping Wang, Wei Wang, Lang Liu, Zhi-Yong Zheng, Meng-En Du   +4 more
doaj   +1 more source

Topological Quantum Optics Using Atomlike Emitter Arrays Coupled to Photonic Crystals. [PDF]

Physical Review Letters, 2018
We propose an experimentally feasible nanophotonic platform for exploring many-body physics in topological quantum optics. Our system is composed of a two-dimensional lattice of nonlinear quantum emitters with optical transitions embedded in a photonic ...
J. Perczel, J. Borregaard, D. Chang, S. Yelin, M. Lukin   +4 more
semanticscholar   +1 more source

Probing the universality of topological defect formation in a quantum annealer: Kibble-Zurek mechanism and beyond [PDF]

, 2020
The number of topological defects created in a system driven through a quantum phase transition exhibits a power-law scaling with the driving time. This universal scaling law is the key prediction of the Kibble-Zurek mechanism (KZM), and testing it using
Y. Bando, Yuki Susa, Hiroki Oshiyama, N. Shibata, Masayuki Ohzeki, F. J. G'omez-Ruiz, Daniel A. Lidar, S. Suzuki, A. del Campo, H. Nishimori   +9 more
semanticscholar   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Topological Nematic States and Non-Abelian Lattice Dislocations

Physical Review X, 2012
An exciting new prospect in condensed matter physics is the possibility of realizing fractional quantum Hall states in simple lattice models without a large external magnetic field.
Maissam Barkeshli, Xiao-Liang Qi
doaj   +1 more source