Article
Physics, Multidisciplinary
Vladimir Y. Chernyak, Nikolai A. Sinitsyn
Summary: Among multistate Landau-Zener systems, operators that depend on time quadratically are more common and generally lead to constraints on the independent variables that parametrize the scattering matrix, resulting in asymptotically exact expressions for transition probabilities. New and more complex fully solvable MLZ systems have also been discovered.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Multidisciplinary
Weixin Liu, Tao Wang, Weidong Li
Summary: In this study, we analyze the nonadiabatic geometric phase of a doubly driven two-level system with an additional relative phase between the two driving modes. It is found that the system's time evolution strongly depends on this relative phase. The condition for the system to return to its initial state after a single period is determined using the Landau-Zener-Stuckelberg-Majorana destructive interference. The nonadiabatic geometric phase during a cyclic evolution is shown to be related to the Stokes phase and the relative phase. By controlling the relative phase, the geometric phase can characterize two distinct phases in the adiabatic limit.
Article
Optics
Takayuki Suzuki, Hiromichi Nakazato
Summary: In this paper, we propose to extend the adiabatic impulse approximation to multilevel systems and analyze the dynamics of the Landau-Zener grid model and the multilevel Landau-Zener-Stuckelberg-Majorana interference model. The results show that the proposed method is in good agreement with the exact dynamics evaluated numerically and derive the conditions for destructive interference in multilevel systems.
Article
Quantum Science & Technology
Daniel Melvin, Fulu Zheng, Kewei Sun, Zhengjie Tan, Yang Zhao
Summary: In this study, the photon-assisted Landau-Zener (LZ) transitions and qubit manipulation in a hybrid quantum electrodynamics device are investigated using multiple Davydov D-2 Ansätze and the time-dependent variational principle. The results show that phonons can alter the qubit dynamics, and a strong phonon coupling strength can significantly perturb the qubit dynamics.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Optics
Rishindra Melanathuru, Simon Malzard, Eva-Maria Graefe
Summary: This paper introduces a PT-symmetric non-Hermitian quantum system with two Nth order exceptional points and derives the Landau-Zener transition probabilities, showing a binomial behavior. It demonstrates that, despite the breakdown of adiabaticity often associated with non-Hermitian systems, the behavior can still be understood based on adiabatic analysis.
Article
Physics, Applied
V. Shnyrkov, A. P. Shapovalov, V. Yu Lyakhno, A. O. Dumik, A. A. Kalenyuk, P. Febvre
Summary: In this study, the magnetic flux of superconducting qubits was measured using RF SQUIDs and an 800 MHz bandwidth cryogenic amplifier. Experimental results obtained at 2 K and 4 K temperatures for RF SQUIDs in hysteretic and non-hysteretic modes were discussed. The parameters of RF SQUIDs were analyzed using the resistively and capacitively shunted junction model. Additionally, the sensitivity and frequency range for reading the state of a flux qubit were calculated and optimized.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Satyaki Kar
Summary: The study investigates the impact of an oscillating magnetic field on nodal line semimetals, revealing that low energy Landau level states can periodically become gapless under suitable parameters and the Landau tubes cross the Fermi surface twice per cycle. Additionally, topologically nontrivial magnetic oscillations can be witnessed at low energies with an oscillating magnetic field parallel to the nodal loop.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Optics
Alessio D'Errico, Raouf Barboza, Rebeca Tudor, Alexandre Dauphin, Pietro Massignan, Lorenzo Marrucci, Filippo Cardano
Summary: This paper successfully establishes a photonic quantum walk in the presence of a synthetic gauge field and explores its dynamics, focusing on the ballistic spreading behavior when the energy gaps are extremely small.
Article
Physics, Multidisciplinary
Shanbo Chow, Zhi Wang, Dao-Xin Yao
Summary: In this study, the coupling between an external quantum dot and the Majorana bound states in Josephson junctions is investigated. It is demonstrated that Landau-Zener transitions occur between opposite parity states of the Majorana bound states when the energy level of the quantum dot is modulated. Moreover, Landau-Zener-Stuckelberg interference is observed on the parity states under periodic modulation of the quantum dot level. These findings provide signals for detecting the existence of the Majorana bound states.
Article
Materials Science, Multidisciplinary
Irina Heinz, Guido Burkard
Summary: One of the challenges in scaling up semiconductor-based quantum processors is the presence of crosstalk errors caused by control operations. This study analyzes the impact of crosstalk drives on qubit operations and develops appropriate control protocols to minimize crosstalk errors.
Article
Chemistry, Physical
Xiang-Rui Ma, Jun Zhang, Yong-Chen Xiong, Wanghuai Zhou
Summary: The LZSH method can provide accurate results for certain 1D models, but may only offer semi-quantitative results for others, and may fail to capture certain quantum effects. The performance of the method depends on the shape of the adiabatic potential energy surface.
Article
Optics
Mikhail Tokman, Alex Behne, Brandon Torres, Maria Erukhimova, Yongrui Wang, Alexey Belyanin
Summary: In this study, we investigate the quantum dynamics of many-qubit systems strongly coupled to a quantized electromagnetic cavity field in the presence of decoherence and dissipation. The varying coupling strength of different qubits to the cavity field and the spread of their transition frequencies are taken into account. We derive compact analytic solutions for time-dependent quantum state amplitudes and observables for a broad class of open quantum systems using the stochastic Schrodinger equation approach. Depending on the initial quantum state preparation, we demonstrate that an ensemble of qubits can evolve into a rich variety of many-qubit entangled states with destructive or constructive interference between the qubits. Specifically, when only a small fraction of qubits are initially excited, the dissipation in a cavity will inevitably drive the system into robust dark states that are completely decoupled from the cavity and have much longer lifetimes than the decay time of the cavity field. Furthermore, we identify the conditions under which coherent coupling to the quantized cavity field overcomes the dephasing caused by a spread of transition frequencies in multiqubit systems and leads to the formation of a decoupled dark state.
Article
Chemistry, Multidisciplinary
Bassel Heiba Elfeky, Joseph J. Cuozzo, Neda Lotfizadeh, William F. Schiela, Seyed M. Farzaneh, William M. Strickland, Dylan Langone, Enrico Rossi, Javad Shabani
Summary: This study investigates the missing odd Shapiro steps in Al-InAs junctions in the presence of an in-plane magnetic field. It is found that the odd steps reappear at a certain magnetic field value, exhibiting an in-plane field angle anisotropy related to spin-orbit coupling effects. The results provide insights into the complex phenomenology of missing Shapiro steps and the current phase relations in planar Josephson junctions.
Article
Materials Science, Multidisciplinary
Anton Khvalyuk, Mikhail Feigel'man
Summary: We developed an analytic theory of inhomogeneous superconducting pairing in strongly disordered materials close to the superconducting-insulator transition. Our key finding is that the distribution function of the order parameter depends crucially on the effective number of nearest neighbors, with the solution valid for both large and small values of this parameter. The analytic results are supported by numerical data, showing good agreement between them.
Article
Multidisciplinary Sciences
Ryan M. Jock, N. Tobias Jacobson, Martin Rudolph, Daniel R. Ward, Malcolm S. Carroll, Dwight R. Luhman
Summary: This research demonstrates a method for controlling electron spin qubits on a silicon heterointerface through spin-orbit effects, without the need for complex nanofabrication equipment. The method offers high logic gate orthogonality and long qubit coherence time, while enabling fast control. The study also investigates charge noise in a silicon double quantum dot through dynamical decoupling experiments and evaluates qubit frequency drift and low-frequency noise.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Bin Cheng, Peng Wang, Cheng Pan, Tengfei Miao, Yong Wu, T. Taniguchi, K. Watanabe, C. N. Lau, M. Bockrath
APPLIED PHYSICS LETTERS
(2015)
Article
Chemistry, Multidisciplinary
Jhao-Wun Huang, Cheng Pan, Son Tran, Bin Cheng, Kenji Watanabe, Takashi Taniguchi, Chun Ning Lau, Marc Bockrath
Article
Physics, Multidisciplinary
Bin Cheng, Yong Wu, Peng Wang, Cheng Pan, T. Taniguchi, K. Watanabe, M. Bockrath
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
B. -Y. Jiang, G. X. Ni, C. Pan, Z. Fei, B. Cheng, C. N. Lau, M. Bockrath, D. N. Basov, M. M. Fogler
PHYSICAL REVIEW LETTERS
(2016)
Article
Chemistry, Multidisciplinary
C. Pan, Y. Wu, B. Cheng, S. Che, T. Taniguchi, K. Watanabe, C. N. Lau, M. Bockrath
Article
Chemistry, Multidisciplinary
Y. Wu, D. Zhai, C. Pan, B. Cheng, T. Taniguchi, K. Watanabe, N. Sandler, M. Bockrath
Article
Engineering, Electrical & Electronic
Xinsheng Tan, Shanhua Cong, Cheng Pan, Yang Yu, Guozhu Sun, Jian Chen, Peiheng Wu
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2011)
Article
Physics, Fluids & Plasmas
Cheng Pan, Xinsheng Tan, Yang Yu, Guozhu Sun, Ling Kang, Weiwei Xu, Jian Chen, Peiheng Wu
Article
Chemistry, Multidisciplinary
Bin Cheng, Cheng Pan, Shi Che, Peng Wang, Yong Wu, Kenji Watanabe, Takashi Taniguchi, Supeng Ge, Roger Lake, Dmitry Smirnov, Chun Ning Lau, Marc Bockrath
Article
Physics, Multidisciplinary
Shi Che, Petr Stepanov, Supeng Ge, Menglin Zhu, Dongying Wang, Yongjin Lee, Kevin Myhro, Yanmeng Shi, Ruoyu Chen, Ziqi Pi, Cheng Pan, Bin Cheng, Takashi Taniguchi, Kenji Watanabe, Yafis Barlas, Roger K. Lake, Marc Bockrath, Jinwoo Hwang, Chun Ning Lau
PHYSICAL REVIEW LETTERS
(2020)
