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
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
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
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
Multidisciplinary Sciences
Guang Yuan Zhu, Yi Qin, Miao Meng, Suman Mallick, Hang Gao, Xiaoli Chen, Tao Cheng, Ying Ning Tan, Xuan Xiao, Mei Juan Han, Mei Fang Sun, Chun Y. Liu
Summary: The Landau-Zener formula, a semiclassical model for nonadiabatic transitions, is shown to be valid in a broader range of conditions approaching the adiabatic regime than previously expected, as demonstrated by investigating electron transfer reactions in a series of mixed-valence complexes.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Zhigang Wang, Zhen-Guo Fu, Ping Zhang, Wei Zhang
Summary: In this work, the nonlinear current response of Weyl semimetals to a strong dc-ac electric field in the ultraquantum regime with a strong magnetic field is studied. The results show that the nonlinear current response of Weyl semimetals can be modulated by ac fields, with interesting phenomena such as dynamic localization and quasienergy band collapse.
Article
Physics, Multidisciplinary
Ze-Guo Chen, Weiyuan Tang, Ruo-Yang Zhang, Zhaoxian Chen, Guancong Ma
Summary: This study explores the transfer of topological boundary states in an acoustic waveguide system and reveals the quantitative condition for the breakdown of adiabaticity. The results not only lay a foundation for future research on dynamic state transfer, but also inspire applications leveraging nonadiabatic transitions as a new degree of freedom.
PHYSICAL REVIEW LETTERS
(2021)
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
Physics, Condensed Matter
M. E. Raikh
Summary: A remarkable feature of the Landau-Zener transition is the insensitivity of the survival probability to the decay rate of the excited state. This insensitivity holds even when the density of states in the continuum is energy-independent. In cases where the density of states in the continuum is a step-like function of energy, the decay rate of the excited level can show a jump at a certain time, impacting the survival probability.
SOLID STATE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Andrea Pizzi, Andreas Nunnenkamp, Johannes Knolle
Summary: The researchers introduced a simple cellular automaton model with power-law interactions, leading to a bistable phase of long-ranged directed percolation. They found that the system's response period is affected by periodic modulation. The self-correcting mechanism of long-ranged interactions can compensate for noise-induced imperfections.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Linliang Gao, Kewei Sun, Huiru Zheng, Yang Zhao
Summary: A deep-learning approach combining unsupervised and supervised learning algorithms is introduced in this study for simulating and predicting Landau-Zenner dynamics. By training with data from multiple Davydov D2 Ansatz and evaluating with data from trial states, high-precision prediction and simulation are successfully achieved.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Physics, Multidisciplinary
Rui Wu, Panpan Fang, Chen Sun, Fuxiang Li
Summary: By studying the many-particle nonadiabatic quench dynamics, we find that the concepts of band inversion surface and spin inversion surface are still applicable in topological systems. We also solve a new and nontrivial three-level Landau-Zener model and reveal the topological spin texture.
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
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
Optics
Y. Cao, T. F. Xu
Summary: We investigated the nonlinear Landau-Zener tunneling with higher-order dispersion and used a two-mode approximation to transform the Gross-Pitaevskii (GP) equation with higher-order dispersion terms into a nonlinear two-energy level form. We performed a comprehensive analysis on the loop structure of the lowest-energy band and the nonlinear Landau-Zener tunneling. Our results showed that the energy band structure exhibits spatial inversion symmetry breaking and unbalanced Landau-Zener tunneling when the third-order dispersion coefficient is non-zero. We also studied the real-time evolution of solitons with transverse bias and observed the tunneling phenomenon. Furthermore, we found that adjusting the dispersion term can effectively control optical tunneling, which presents an alternative idea for optical switching.
Article
Chemistry, Physical
N. Sirica, P. P. Orth, M. S. Scheurer, Y. M. Dai, M-C Lee, P. Padmanabhan, L. T. Mix, S. W. Teitelbaum, M. Trigo, L. X. Zhao, G. F. Chen, B. Xu, R. Yang, B. Shen, C. Hu, C-C Lee, H. Lin, T. A. Cochran, S. A. Trugman, J-X Zhu, M. Z. Hasan, N. Ni, X. G. Qiu, A. J. Taylor, D. A. Yarotski, R. P. Prasankumar
Summary: Symmetry plays a central role in conventional and topological phases of matter, making the ability to optically drive symmetry changes a critical step in developing future technologies. Topological materials, like topological semimetals, are particularly sensitive to changes in time-reversal and crystalline symmetries, affecting both bulk and surface electronic states. The study demonstrates ultrafast symmetry breaking using optically driven photocurrents.
Article
Physics, Multidisciplinary
Thais Trevisan, Pablo Villar Arribi, Olle Heinonen, Robert-Jan Slager, Peter P. Orth
Summary: Bicircular light is shown to be a versatile method for controlling magnetic symmetries and topology in materials. Using a low-energy model, Cd3As2 is theoretically demonstrated as a promising platform for BCL Floquet engineering, which can induce a transition to a noncentrosymmetric magnetic Weyl semimetal phase. With strain, a magnetic topological crystalline insulator with unique unpinned surface Dirac states can be predicted, protected by a combination of twofold rotation and time reversal symmetries and controllable by light.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Victor Drouin-Touchette, Peter P. Orth, Piers Coleman, Premala Chandra, Tom C. Lubensky
Summary: Many two-dimensional physical systems can be described by coupled XY models, which range from atomic-molecular condensates to low dimensional superconductors and liquid-crystal films. The interplay of topology and competing interactions in these systems drives new kinds of emergent behavior in both quantum and classical settings.
Article
Materials Science, Multidisciplinary
Peter P. Orth, D. Phelan, J. Zhao, H. Zheng, J. F. Mitchell, C. Leighton, Rafael M. Fernandes
Summary: By using Monte Carlo simulations, this study discovered that previously ignored magnetic frustration is the cause of the delayed onset of long-range ferromagnetism in doped perovskite cobaltites.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Multidisciplinary
Anirban Mukherjee, Noah F. Berthusen, Joao C. Getelina, Peter P. Orth, Yong-Xin Yao
Summary: Hybrid quantum-classical embedding methods for correlated materials simulations have not been extensively studied, particularly regarding the large quantum resources required for multi-band d and f electron materials. In this study, we compare the performance of different variational quantum eigensolvers in ground state preparation for interacting multi-orbital embedding impurity models, finding that adaptive algorithms and models with 8 spin-orbitals can achieve fidelities better than 99.9%, with an average of 2(14) shots per measurement circuit. Additionally, even with gate noise, parameter optimizations can still be performed if the two-qubit gate error is below 10(-3), slightly lower than current hardware levels. Finally, we measure the ground state energy on IBM and Quantinuum hardware using a converged adaptive ansatz and obtain a relative error of 0.7%.
COMMUNICATIONS PHYSICS
(2023)
Article
Multidisciplinary Sciences
Anyuan Gao, Yu-Fei Liu, Jian-Xiang Qiu, Barun Ghosh, Thais V. Trevisan, Yugo Onishi, Chaowei Hu, Tiema Qian, Hung-Ju Tien, Shao-Wen Chen, Mengqi Huang, Damien Berube, Houchen Li, Christian Tzschaschel, Thao Dinh, Zhe Sun, Sheng-Chin Ho, Shang-Wei Lien, Bahadur Singh, Kenji Watanabe, Takashi Taniguchi, David C. Bell, Hsin Lin, Tay-Rong Chang, Chunhui Rita Du, Arun Bansil, Liang Fu, Ni Ni, Peter P. Orth, Qiong Ma, Su-Yang Xu
Summary: This article reports a quantum metric nonlinear Hall effect induced by interfacing even-layered MnBi2Te4 with black phosphorus. The effect switches direction upon reversing the antiferromagnetic spins and exhibits distinct scaling.
Article
Quantum Science & Technology
M. Sohaib Alam, Noah F. Berthusen, Peter P. Orth
Summary: This study investigates the feasibility of using reinforcement learning for single-qubit quantum state preparation and gate compilation. By constructing Markov decision processes, the researchers find optimal paths that correspond to the shortest possible sequence of gates to achieve the desired outcomes. The method works well in both noisy and noise-free environments, and outperforms other quantum compilation methods.
NPJ QUANTUM INFORMATION
(2023)
Article
Materials Science, Multidisciplinary
Ana-Marija Nedic, Victor L. Quito, Yuriy Sizyuk, Peter P. Orth
Summary: We propose stacked two-dimensional lattice designs of frustrated and SO(3)-symmetric spin models that realize emergent Z3 Potts nematic order. Using Monte Carlo simulations and analytical calculations, we investigate the classical AFM-FM windmill model and map out its phase diagrams. We discover a state with composite Potts nematic order and relate it to Potts phases in other spin models.
Article
Materials Science, Multidisciplinary
Farhan Islam, Thais. Trevisan, Thomas Heitmann, Santanu Pakhira, Simon X. M. Riberolles, N. S. Sangeetha, David C. Johnston, Peter P. Orth, David Vaknin
Summary: We present neutron-diffraction results on single-crystal CaMn2P2 with corrugated Mn honeycomb layers, and determine the ground-state magnetic structure. The diffraction patterns consist of (1/6,1/6,L) magnetic Bragg reflections, indicating a first-order antiferromagnetic transition at TN = 70(1) K. Analysis reveals a 6 x 6 magnetic unit cell with spins rotating by 60 degrees steps between nearest neighbors on each sublattice, consistent with the PAc magnetic space group. Several other magnetic subgroup symmetries of the paramagnetic P3m1 crystal symmetry are also consistent with the diffraction pattern. Our findings are relevant to frustrated J1-J2-J3 Heisenberg honeycomb antiferromagnets with single-ion anisotropy and the emergence of Potts nematicity.
Article
Quantum Science & Technology
Erik J. Gustafson, Andy C. Y. Li, Abid Khan, Joonho Kim, Doga Murat Kurkcuoglu, M. Sohaib Alam, Peter P. Orth, Armin Rahmani, Thomas Iadecola
Summary: Quantum many-body scar states, which exhibit atypical entanglement and correlation properties, can be studied using state preparation protocols on quantum computers. Experimental demonstrations on superconducting quantum hardware have been provided.
Article
Physics, Multidisciplinary
Klee Pollock, Peter P. Orth, Thomas Iadecola
Summary: We propose a variational quantum algorithm to estimate microcanonical expectation values in models obeying the eigenstate thermalization hypothesis. The algorithm generates weakly entangled superpositions of eigenstates at a given target energy density by using a relaxed criterion for convergence. These variational states are then used to estimate microcanonical averages of local operators.
PHYSICAL REVIEW RESEARCH
(2023)
Proceedings Paper
Computer Science, Software Engineering
Benjamin McDonough, Andrea Mari, Nathan Shammah, Nathaniel T. Stemen, Misty Wahl, William J. Zeng, Peter P. Orth
Summary: Current quantum computers suffer from noise issues, which affect the accuracy of results. To mitigate the bias caused by noise, probabilistic error cancellation (PEC) and probabilistic error reduction (PER) methods can be used. PER reduces the sampling overhead but reintroduces bias. To facilitate the widespread use of PER, we have developed an automated quantum error mitigation software framework.
2022 IEEE/ACM THIRD INTERNATIONAL WORKSHOP ON QUANTUM COMPUTING SOFTWARE (QCS)
(2022)
Article
Optics
Ammar Jahin, Andy C. Y. Li, Thomas Iadecola, Peter P. Orth, Gabriel N. Perdue, Alexandru Macridin, M. Sohaib Alam, Norm M. Tubman
Summary: In this study, the variational quantum eigensolver (VQE) was used to simulate Kitaev spin models. It was found that a variational ansatz based on the fermionic representation can accurately express the exact ground state in the solvable limit and provide high accuracy beyond this limit.
Article
Physics, Multidisciplinary
Noah F. Berthusen, Thais Trevisan, Thomas Iadecola, Peter P. Orth
Summary: We present a postquench dynamics simulation of a Heisenberg model on IBM quantum hardware that surpasses the coherence time of the device. A hybrid quantum-classical algorithm is used to propagate a state and perform a classical optimization that compresses the time-evolved state into a variational form. The optimization of the noisy cost function is found to be the main bottleneck in scaling to larger system sizes.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
E. H. Krenkel, M. A. Tanatar, M. Konczykowski, R. Grasset, E. I. Timmons, S. Ghimire, K. R. Joshi, Y. Lee, Liqin Ke, Shuzhang Chen, C. Petrovie, P. P. Orth, M. S. Scheurer, R. Prozorov
Summary: We study the temperature-dependent resistivity evolution induced by electron irradiation with added pointlike disorder in stoichiometric compositions of the 3-4-13 stannides. The coexistence of charge density wave (CDW) order and superconductivity (SC) is observed in some compounds, and irradiation universally suppresses CDW transition temperature T-CDW. The superconducting transition temperature T-c shows a more complex behavior, either increasing initially and saturating at higher doses or monotonically suppressed by irradiation. A weak-coupling, full single gap, isotropic superconducting state is revealed by measuring the London penetration depth lambda(T).
