Article
Multidisciplinary Sciences
Thomas Easton, Marios Kokmotos, Giovanni Barontini
Summary: We numerically study the formation of vortex clusters in trapped Bose-Einstein condensates where vortices are initially imprinted in a line. We show that such a system exhibits a rich phenomenology depending on the distance at which the vortices are imprinted and their number. Our work sets the stage for possible experimental implementations where the formation of vortex clusters and more exotic bound states of vortices could be observed.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Fluids & Plasmas
Phelo Otlaadisa, Conrad Bertrand Tabi, Timoleon Crepin Kofane
Summary: This study introduces a vector form of the cubic complex Ginzburg-Landau equation describing the dynamics of dissipative solitons in two-component helicoidal spin-orbit coupled open Bose-Einstein condensates, with dissipative interactions added through coupled rate equations. Using numerical simulations and linear theory, the research investigates modulational instability and the threshold for amplitude perturbations.
Article
Optics
Zhiqian Gui, Zhenming Zhang, Jin Su, Hao Lyu, Yongping Zhang
Summary: This study reveals the mechanism of phase separation in a trapped spin-1/2 Bose-Einstein condensate with spin-orbit coupling and analyzes the differences between phase separations in different conditions. It proposes an application of adiabatic splitting dynamics.
Article
Optics
Sandra M. Jose, Komal Sah, Rejish Nath
Summary: In this article, we analyze the formation of transient patterns and spin-spin correlations in quasi-two-dimensional spin-1 homogeneous Bose-Einstein condensates under parametric driving of s-wave scattering lengths. The dynamics for an initial ferromagnetic phase is the same as that of a scalar condensate, while intriguing dynamics emerge for an initial polar state. We show that competition exists between density patterns and spin-mixing dynamics, leading to a gas of polar core vortices and antivortices of different spin textures.
Article
Physics, Multidisciplinary
Mariya Iv Trukhanova, Yuri N. Obukhov
Summary: In this study, a novel model of magnetized spin-1 Bose-Einstein condensate is developed using the method of many-particle quantum hydrodynamic. The dynamics of fluid velocity and magnetization are determined by a nontrivial modification of the Euler and Landau-Lifshitz equations. The properties of dispersion spectrum of collective excitations are described, predicting an anisotropic spin wave instability.
Article
Physics, Multidisciplinary
Jie Wang, Jun-Cheng Liang, Zi-Fa Yu, An-Qing Zhang, Ai-Xia Zhang, Ju-Kui Xue
Summary: We study the ground state phases of quasi-one-dimensional spin-orbit coupled spin-1 Bose-Einstein condensates trapped in a harmonic potential. Based on variational analysis, we obtain the conditions for phase transition between magnetized and unmagnetized phases analytically for the first time, and reveal the physical mechanism of inducing phase transition. We discuss the competition relationship among spin-independent interaction, spin-dependent interaction, spin-orbit (SO) coupling, and the harmonic potential for generating phase transition systematically.
Article
Materials Science, Multidisciplinary
Qingbo Wang, Wenjing Zhao, Linghua Wen
Summary: The study reveals that spin-orbit coupling has a significant influence on the dynamics of kicked pseudo-spin-1/2 Bose-Einstein condensates under different conditions, mainly reflected in the different behaviors of density distribution and energy evolution.
RESULTS IN PHYSICS
(2021)
Article
Optics
Jing Yang, Yongping Zhang
Summary: Spin-orbit-coupled spinor gap solitons in spin-1 spin-orbit-coupled spinor Bose-Einstein condensates are studied in an experimentally realizable system with an optical lattice. The spin-dependent parity symmetry of the spin-orbit coupling plays a crucial role, leading to the discovery of two families of solitons with opposite spin-dependent parity. An approximate model using a harmonic trap instead of an optical lattice reveals the physical origin of these two families. Additionally, a type of gap soliton that spontaneously breaks the spin-dependent parity symmetry is found for zero effective quadratic Zeeman shift.
Article
Optics
Deokhwa Hong, Junghoon Lee, Jongmin Kim, Jong Heum Jung, Kyuhwan Lee, Seji Kang, Y. Shin
Summary: We have observed stationary turbulence in antiferromagnetic spin-1 Bose-Einstein condensates driven by a radio-frequency magnetic field. The injected energy from the magnetic driving causes the emergence of an irregular spin texture in the condensate. Under continuous driving, the condensate evolves into a nonequilibrium steady state with spin turbulence, while the low-energy scale of spin excitations minimally affects the sample's lifetime. When the driving strength is comparable to the system's spin interaction energy and quadratic Zeeman energy, the stationary turbulent state exhibits spin-isotropic features.
Article
Optics
Rajamanickam Ravisankar, Henrique Fabrelli, Arnaldo Gammal, Paulsamy Muruganandam, Pankaj Kumar Mishra
Summary: This study presents the collective excitation spectrum analysis of binary Bose-Einstein condensates with spin-orbit and Rabi couplings, revealing the crucial role of SO and Rabi coupling strengths in determining the dynamical stability of coupled BECs. The results show that an increase in SO coupling leads to instability, while an increase in Rabi coupling stabilizes the system and generates different excitation modes.
Article
Multidisciplinary Sciences
Jack O. Law, Carl M. Jones, Thomas Stevenson, Thomas A. Williamson, Matthew S. Turner, Halim Kusumaatmaja, Sushma N. Grellscheid
Summary: Interfacial tension is important for droplet coalescence and interaction with lipid membranes. A model based solely on interfacial tension is inadequate for describing stress granules in live cells, which exhibit elastic bending deformation. Stress granules have an irregular, nonspherical shape and are viscoelastic droplets with a structured interface. Different types of stress granules can only be differentiated through large-scale surveys.
Article
Physics, Multidisciplinary
P. Naidon, D. S. Petrov
Summary: Repulsive Bose-Bose mixtures are known to either mix or phase separate into pure components. Here, a mixed-bubble regime is predicted, where bubbles of the mixed phase coexist with a pure phase of one of the components. This effect arises due to unequal masses or unequal intraspecies coupling constants, resulting in a competition between the mean-field term and a nonquadratic beyond-mean-field correction. Parameters of the mixed-bubble regime in all dimensions are identified and implications for current experiments are discussed.
PHYSICAL REVIEW LETTERS
(2021)
Article
Mechanics
Ning Liu, Z. C. Tu
Summary: This paper investigates Bose polarons formed by the interaction between impurities and Bose-Einstein condensates. By deriving an effective Frohlich Hamiltonian and using variational methods, the relevant properties of Bose polarons are studied. It is found that the contribution of IS coupling to the ground state energy decreases to zero near the miscible-immiscible boundary, and an increase in IS coupling leads to a greater number of virtual phonons and a significant increase in the effective mass of Bose polarons.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Mathematics, Applied
Ling-Zheng Meng, Yan-Hong Qin, Li-Chen Zhao
Summary: This paper investigates the properties and motion of vector solitons in Bose-Einstein condensates, exploring the nonintegrable cases of spin soliton solutions and their stability. The results show that these spin solitons are robust against spin-dependent interactions and noise, exhibiting features such as negative-positive mass transition, splitting, diffusion, and collisions.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Physics, Multidisciplinary
H. A. J. Middleton-Spencer, N. G. Parker, L. Galantucci, C. F. Barenghi
Summary: A method to detect the presence and depth of dark solitons in repulsive one-dimensional harmonically trapped Bose-Einstein condensates is presented. The shift of density in Fourier space directly maps onto the depth of the soliton in single soliton systems, and combining spectral methods with imaging techniques allows for determination of soliton characteristics in multi-soliton systems. The detection of solitons by spectral shift is verified to work in the presence of waves induced by density engineering methods, with implications discussed for vortex detection in three-dimensional Bose-Einstein condensates.
Article
Physics, Condensed Matter
Arya Dhar, Christian Baals, Bodhaditya Santra, Andreas Muellers, Ralf Labouvie, Thomas Mertz, Ivana Vasic, Agnieszka Cichy, Herwig Ott, Walter Hofstetter
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2019)
Article
Physics, Multidisciplinary
Pedro Ribeiro, Achilleas Lazarides, Masudul Haque
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Ana Hudomal, Ivana Vasic, Nicolas Regnault, Zlatko Papic
COMMUNICATIONS PHYSICS
(2020)
Article
Physics, Fluids & Plasmas
Phillip C. Burke, Goran Nakerst, Masudul Haque
Summary: The study examines different methods of assigning temperature to energies or eigenstates in finite isolated quantum systems. It is found that the commonly used assignment based on the canonical energy-temperature relationship only depends on energy eigenvalues and not on the structure of eigenstates. The definition of temperature for eigenstates is considered by minimizing the distance between (full or reduced) eigenstate density matrices and canonical density matrices. The results show that the minimizing temperature depends on the distance measure chosen and matches the canonical temperature for the trace distance.
Article
Physics, Fluids & Plasmas
Phillip C. Burke, Masudul Haque
Summary: We investigate the comparison between the temperature calculated from the microcanonical entropy and the canonical temperature for finite isolated quantum systems. Our focus is on systems that can be numerically diagonalized exactly due to their size. We thus characterize the deviations from ensemble equivalence at finite sizes and present multiple methods to compute the microcanonical entropy, providing numerical results for the entropy and temperature obtained using these methods. We show that using an energy window with a particular energy dependence minimizes the deviations from the canonical temperature.
Article
Physics, Fluids & Plasmas
Goran Nakerst, Masudul Haque
Summary: We investigate the relationship between chaos in a Bose-Hubbard system and its classical limit. By comparing quantum measures of chaos with classical measures, we find a strong correspondence between the two cases in terms of energy and interaction strength. Unlike strongly chaotic and integrable systems, the largest Lyapunov exponent is shown to be a multivalued function of energy.
Article
Physics, Fluids & Plasmas
Masudul Haque, Paul A. McClarty, Ivan M. Khaymovich
Summary: Eigenstates of local many-body interacting systems far from spectral edges are believed to be ergodic and close to randomness, aligning with the eigenstate thermalization hypothesis and entanglement volume-law scaling. However, systematic departures from complete randomness are typically present in mid-spectrum eigenstates, partly due to spatial correlations and orthogonality to eigenstates at the spectral edge, which introduce structure to these mid-spectrum states.
Article
Physics, Fluids & Plasmas
Goran Nakerst, Masudul Haque
Summary: The study explores the effect of increasing the particle number in fixed lattice topologies in the classical or semiclassical limit, focusing on the behavior of the Bose-Hubbard system. It is found that for larger lattices, the ETH scaling of physical midspectrum eigenstates follows the ideal (Gaussian) expectation, while for smaller lattices, anomalous scaling occurs with a different exponent. Various plausible mechanisms for this anomaly are examined.
Article
Materials Science, Multidisciplinary
Paul A. McClarty, Masudul Haque, Arnab Sen, Johannes Richter
Article
Optics
Phillip C. Burke, Jan Wiersig, Masudul Haque
Article
Materials Science, Multidisciplinary
Dillip K. Nandy, Masudul Haque, Anne E. B. Nielsen
Article
Physics, Multidisciplinary
Luis Colmenarez, Paul A. McClarty, Masudul Haque, David J. Luitz
Article
Materials Science, Multidisciplinary
Masudul Haque, P. A. McClarty
Article
Physics, Fluids & Plasmas
Arnd Baecker, Masudul Haque, Ivan M. Khaymovich
Article
Materials Science, Multidisciplinary
Adam Bacsi, Masudul Haque, Balazs Dora
