Article
Physics, Multidisciplinary
Geza odor, Shengfeng Deng
Summary: The second-order Kuramoto equation describes the synchronization of coupled oscillators with inertia, which is important in various fields including power grids. In this study, we investigate the synchronization transition behavior of the second-order Kuramoto equation on large 2D and 3D lattices. We find evidence of hybrid phase transitions and provide numerical estimates for the critical exponents.
Article
Physics, Multidisciplinary
Liang He, Su Yi
Summary: We reveal a divergent issue associated with the mean-field theory for Bose gases in optical lattices and solve it by establishing a general finite temperature mean-field theory. This theory exhibits an intrinsic non-Hermitian structure and provides an efficient approach for investigating the finite temperature properties of systems with complex spatial structures.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Kun Tao, Wenhai Song, Peng Tong, Tingjiao Xiong, Tianyang Wang, Xuekai Zhang, Lulu Xie, Jianchao Lin, Yuping Sun
Summary: The researchers proposed a method to measure the caloric effect under the combination of magnetic field and hydrostatic pressure, and successfully enhanced the reversible caloric effect of an alloy material. This method can be applied to study the multicaloric effect in other multiferroic materials and promote the development of solid-state refrigeration in practical applications.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Chao Zhou, Tieyan Chang, Zhiyong Dai, Yuanliang Chen, Chenyang Guo, Yoshitaka Matsushita, Xiaoqin Ke, Adil Murtaza, Yin Zhang, Fanghua Tian, Wenliang Zuo, Yu-sheng Chen, Sen Yang, Xiaobing Ren
Summary: This paper investigates the nature of phase transitions in TbCo2, a Laves-phase rare-earth-transition metal intermetallic compound. Through experimental evidence and interpretation using Landau theory, it is determined that the transition in TbCo2 is a first-order transition. This study contributes to a deeper understanding of phase transitions in magnetic materials involving both magnetic and structural transitions.
Article
Optics
Louise Wolswijk, Carmelo Mordini, Arturo Farolfi, Dimitris Trypogeorgos, Franco Dalfovo, Alessandro Zenesini, Gabriele Ferrari, Giacomo Lamporesi
Summary: This study investigates the strong out-of-equilibrium dynamics occurring when a harmonically trapped ultracold bosonic gas is evaporatively cooled across the Bose-Einstein condensation transition. The results show that the cooling rate affects the timescales for the growth of the condensate order parameter and the relaxation dynamics of its spatial fluctuations.
Article
Physics, Multidisciplinary
Timon A. Hilker, Lena H. Dogra, Christoph Eigen, Robert P. Smith, Zoran Hadzibabic
Summary: The two sounds in a highly compressible fluid are investigated using an ultracold Bose gas. The results show that only one sound persists at different temperatures, which is consistent with the hydrodynamic theory.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Jin Yue, Yilikal Ayino, Tristan K. Truttmann, Maria N. Gastiasoro, Eylon Persky, Alex Khanukov, Dooyong Lee, Laxman R. Thoutam, Beena Kalisky, Rafael M. Fernandes, Vlad S. Pribiag, Bharat Jalan
Summary: Using hybrid MBE, high-quality SrTiO₃ films with low defect density were obtained, and their transport properties were studied. The dominant influence of intraband scattering at the second Lifshitz transition was observed, along with the anomalous temperature dependence of the Hall scattering factor and carrier density due to the antiferrodistortive transition.
Article
Optics
Xiaobing Luo, Zhao-Yun Zeng, Yu Guo, Baiyuan Yang, Jinpeng Xiao, Lei Li, Chao Kong, Ai-Xi Chen
Summary: In this study, the tunneling dynamics of a single spin-orbit-coupled atom trapped in an optical lattice subjected to lattice shaking and time-periodic Zeeman field was theoretically explored. It was found that spin-orbit (SO) coupling affects the tunneling dynamics in both multiphoton resonance and far-off-resonance parameter regimes. The results suggest potential applications in spin-based quantum information processing and spintronics device design.
Article
Physics, Multidisciplinary
Antonio Piscitelli, Antonio Coniglio, Annalisa Fierro, Massimo Pica Ciamarra
Summary: The dimensional dependence of percolative exponents of the jamming transition was determined via numerical simulations in four and five spatial dimensions, indicating jamming as a mixed first-order percolation transition with specific critical exponents. The upper critical dimension and connectedness length exponent were also discussed in this study.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Mathematics, Interdisciplinary Applications
Hao Huang, Hongcheng Wang, Guihua Chen, Manna Chen, Chin Seong Lim, Kok-Cheong Wong
Summary: The existence and stability of quantum droplets in ultracold atoms in Bose-Einstein condensates with a radial period lattice under the Lee-Huang-Yang correction were studied. Both stable bell-shaped and ring-shaped zero-vorticity quantum droplets were found. It was observed that the existence curves of zero-vorticity quantum droplets could violate the necessary condition for stable solitons. Vortex quantum droplets remained stable with an embedded vorticity up to S = 10 in the presence of radial lattice potential and were trapped at the first and second circular trough of the lattice. The stability areas of vortex quantum droplets with different embedded vorticity were identified through long-time evolution.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Materials Science, Multidisciplinary
Runhan Li, Ning Mao, Linke Cai, Yingxi Bai, Baibiao Huang, Ying Dai, Chengwang Niu
Summary: In this study, the authors propose that ferroelectric switching can be used to control the topological phase transition between Z2 topological insulators and higher-order topological insulators. They identify a potential material candidate for this transition and highlight the significance of this research for the fields of topological physics and materials.
Article
Physics, Fluids & Plasmas
Piotr Bialas, Paulina Czarnota, Piotr Korcyl, Tomasz Stebel
Summary: In this study, the hierarchical autoregressive neural network sampling algorithm is applied to the two-dimensional Q-state Potts model near the phase transition at Q = 12. The performance of this approach is quantified and compared with the Wolff cluster algorithm, showing a significant improvement in statistical uncertainty with similar computational effort. The technique of pretraining is introduced to efficiently train large neural networks by using smaller system sizes as starting configurations. The results demonstrate the effectiveness of the hierarchical approach for systems with bimodal distributions, providing estimates of free energy and entropy with high statistical uncertainties.
Article
Physics, Applied
V. Hardy, R. Hamane, X. Larose, M. Risser, F. Guillou
Summary: This study reports on a method of analyzing semi-adiabatic relaxation data to explain exotic phenomena observed in first-order transitions. The focus is on characterizing latent heat in detail while using the same experimental configuration as accurate heat capacity measurements. The study is consistent with differential scanning calorimetry, magnetization measurements, and conventional heat capacity analysis.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Arnob Kumar Ghosh, Tanay Nag, Arijit Saha
Summary: In this study, we propose two driving schemes to systematically engineer the hierarchy of Floquet first-order topological insulators, FSOTIs, and Floquet third-order topological insulators in three dimensions. The step drive and mass kick protocols exhibit analogous evolution operator structures and allow for the understanding of Floquet phase diagrams and higher-order modes.
Article
Physics, Multidisciplinary
Emil Blomquist, Andrzej Syrwid, Egor Babaev
Summary: This study demonstrates the existence of a new superfluid state in a three-component Bose mixture trapped in an optical lattice, where superfluid transport involving all three components is hindered and dissipationless counterflows between any pair of components are allowed. The presence of three components allows for three different types of counterflows with only two independent superfluid degrees of freedom.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Y. Miyazaki, D. Yamamoto, G. Marmorini, N. Furukawa
Summary: The phase transitions of SU(4)-symmetric tetramer systems exhibit two step-like transitions during the saturation process, with an intermediate phase being a nontrivial solid phase.
Article
Physics, Multidisciplinary
Ryui Kaneko, Ippei Danshita
Summary: This study utilizes tensor-network methods on classical computers to investigate the dynamics of the two-dimensional Bose-Hubbard model, comparing it to known limits and recent experiments. It also covers the intermediate region of moderate interactions.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yuki Miyazaki, Giacomo Marmorini, Nobuo Furukawa, Daisuke Yamamoto
Summary: In this study, we investigate the quantum magnetism of atoms with four nuclear-spin components in a square optical superlattice and reveal the ground-state phase diagram and excitation spectra. Our main finding is the discovery of a nontrivial intermediate phase with a checkerboard-like arrangement.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Physics, Multidisciplinary
Hayato Motegi, Giacomo Marmorini, Nobuo Furukawa, Daisuke Yamamoto
Summary: We studied three-component SU(3) Fermi gases in a square optical lattice with population imbalance between one component and the others. At strong coupling, the system can be described by the SU(3) Heisenberg model with an external field coupling to the population imbalance. We discussed the ground state at the mean-field level and analyzed the thermal fluctuations using the semiclassical Monte Carlo method. The interplay between interactions, population imbalance, and thermal fluctuations leads to a phase transition related to the breaking of an emergent Ising symmetry, even in the absence of frustration. Possible implementations using cold alkaline-earth(-like) atoms are also discussed.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Optics
Mathias Mikkelsen, Ippei Danshita
Summary: It has been discovered that noise correlations measured by time-of-flight imaging in cold-atom experiments can probe the spin structure factor in the Mott-insulating regime of SU(2) Hubbard models. In this study, the mathematical relation between noise correlations and spin structure factor in the strong-interaction limit of SU(N) Hubbard models at any integer filling was derived. Numerical calculations based on the ground states of one-dimensional SU(N) Fermi-Hubbard models for 2≤N≤6 using the density-matrix renormalization-group method confirmed this relation in the regime of strong interactions. It was shown that the deviation between actual noise correlations and those obtained from the spin structure factor scaled as (t/U)^2 for rho = 1 at intermediate and large lattice sizes.
Article
Optics
Daichi Kagamihara, Ryui Kaneko, Shion Yamashika, Kota Sugiyama, Ryosuke Yoshii, Shunji Tsuchiya, Ippei Danshita
Summary: We investigate the time-dependent Renyi entanglement entropy after a quantum quench starting from the Mott-insulating and charge-density-wave states in a one-dimensional free boson system. The second Renyi entanglement entropy is found to be the negative of the logarithm of the permanent of a matrix consisting of timedependent single-particle correlation functions. From this relation and a permanent inequality, we obtain rigorous conditions for satisfying the volume-law entanglement growth. We also succeed in calculating the time evolution of the Renyi entanglement entropy in extremely large systems by brute-force computations of the permanent. We discuss possible applications of our findings to the real-time dynamics of noninteracting bosonic systems.
Article
Materials Science, Multidisciplinary
Shimpei Goto, Ryui Kaneko, Ippei Danshita
Summary: We investigate the sampling efficiency for simulating quantum many-body systems at finite temperatures using initial sampling states generated by applying Trotter gates to random phase product states (RPPSs). The number of Trotter gate applications is proportional to the system size, making the preparation easily achievable in fault-tolerant quantum computers. When the Trotter gates are made from a nonintegrable Hamiltonian, we observe an increase in sampling efficiency with system size, indicating that almost ideal sampling of initial states can be achieved in sufficiently large systems. We also find that the sampling efficiency is comparable to that obtained by a thermal pure quantum (TPQ) state method in some cases, suggesting that chaotic Hamiltonian dynamics can transform RPPSs into an alternative to TPQ states for evaluating thermal expectation values.
Article
Materials Science, Multidisciplinary
Kazuki Okada, Hidekazu Tanaka, Nobuyuki Kurita, Daisuke Yamamoto, Akira Matsuo, Koichi Kindo
Summary: This study investigates the field-angle dependence of the magnetization process in Ba3CoSb2O9 and compares the results with other methods. The research reveals different magnetization behaviors in Ba3CoSb2O9 under different field directions, including a narrow 1/3-magnetization plateau and a high-field transition with a small magnetization jump.
Article
Optics
Mathias Mikkelsen, Ryui Kaneko, Daichi Kagamihara, Ippei Danshita
Summary: The ground-state phase diagram of the one-dimensional attractive Fermi-Hubbard model with spin-dependent hoppings and an on-site Rabi coupling is investigated using the density matrix renormalization group method. It is shown that even in the limit of one component being immobile, the pair superfluidity can be resonantly enhanced when the Rabi coupling is on the order of the interaction strength just before the system starts to strongly polarize. An effective spin-1/2 XXZ model is derived to understand the ground-state properties in the strong attraction limit.
Article
Physics, Multidisciplinary
Daisuke Yamamoto, Kotaro Bannai, Nobuo Furukawa, Carlos A. R. Sa de Melo
Summary: This study investigates the emergence of supersolid devil's staircases of spin-orbit-coupled bosons loaded in optical lattices. It is found that the spin-orbit coupling generates length scales that are commensurate to the lattice spacing, resulting in devil's staircases of supersolids. Umklapp processes are essential for the existence of commensurate supersolids.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
X. Z. Liu, O. Prokhnenko, M. Bartkowiak, A. Gazizulina, D. Yamamoto, A. Matsuo, K. Kindo, K. Okada, N. Kurita, H. Tanaka
Summary: Spin-1/2 triangular lattice Heisenberg antiferromagnet exhibits novel spin structures and phase transitions in an applied magnetic field. In this study, magnetization and neutron scattering experiments were performed on Ba3CoSb2O9 to investigate the system with a field along the c axis. A narrow magnetization plateau and phase transitions were observed, providing insights into the spin-state evolution and phase behavior of the system in the c-axis field.
Article
Optics
Yoshihiro Machida, Ippei Danshita, Daisuke Yamamoto, Kenichi Kasamatsu
Summary: In this theoretical study, we investigate the dynamical formation of a self-bound quantum droplet in a two-component Bose-Hubbard system with an external trap potential. The behavior of the droplet can be induced by controlling the trap potential, and can be qualitatively described by an effective Ginzburg-Landau field theory.
Correction
Optics
Ippei Danshita, Daisuke Yamamoto, Yasuyuki Kato
Article
Physics, Multidisciplinary
Masaya Kunimi, Kazuma Nagao, Shimpei Goto, Ippei Danshita
Summary: By analyzing the dynamics of quantum spin systems, it is found that the validity timescale of DTWA increases algebraically with the range of the step function type interaction in both one- and two-dimensional systems.
PHYSICAL REVIEW RESEARCH
(2021)