Article
Optics
Changming Huang, Zhiyu Lin, Liangwei Dong, Chunyan Li, Penghui Gao, Weiwei Su
Summary: This study investigates the existence and stability of fundamental and multipole solitons supported by amplitude-modulated Fibonacci lattices with self-focusing nonlinearity. Different waveguides in the Fibonacci lattice exhibit solitons with distinct properties, and the outer lattice distribution can significantly impact the existence region of solitons. The stable domain of multipole solitons is compressed as the number of poles increases, providing insights into the dynamics of nonlinear localized multipole modes in Fibonacci lattices.
Article
Astronomy & Astrophysics
Duo Li, Bin Wu, Zhen-Ming Xu, Wen-Li Yang
Summary: This study investigates the thermodynamic properties of a shell of bosons near the Schwarzschild black hole horizon using statistical mechanics, revealing Bose-Einstein condensation at non-zero temperatures in curved spacetimes. Additionally, the analysis of photon gas entropy near the black hole horizon exhibits an area dependence similar to the Bekenstein-Hawking entropy, offering new perspectives on black hole thermodynamics. These findings are extended to D + 1 dimensional spherically symmetric static spacetimes.
Article
Physics, Applied
Kaiyun Zhan, Tingjun Zhao, Qixuan Chen, Qian Zhang, Xinyue Kang
Summary: The study demonstrates that photonic lattices can support optical Zitterbewegung motion with controllable oscillation amplitude. The nonorthogonality of the Floquet-Bloch modes imposed by the non-Hermitian nature of the dynamics significantly affects the wave oscillation dynamics, with the phenomenon showing robustness to perturbations of the gain parameter.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yidan Sun, Haobin Yang, Ziyu Wang, Danlin Xu, Junteng Li, Xin Zhao, Xuewen Long, Dongmei Deng
Summary: This paper presents an innovative form of symmetric and autofocusing beam called symmetric Olver beams (SOBs), which originate from the spectral symmetry phase of the Olver beams. The properties of these beams are found to be related to the Olver integral's order. The experiment demonstrates the capture capability and self-focusing phenomenon of SOBs and vortex symmetric Olver beams, showing potential applications in optical communication and manipulation.
RESULTS IN PHYSICS
(2023)
Article
Optics
Xinyue Kang, Hao Wang, Lichao Dou, Qixuan Chen, Qian Zhang, Tingjun Zhao, Kaiyun Zhan
Summary: We demonstrate the effective realization of the periodic self-imaging phenomenon in a three-layered optical lattice with parity-time symmetric modulations, using theoretical and numerical methods. The Talbot distance and effect can be engineered by varying coupling coefficients and adjusting the modulation phase.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Jiawei Li, Yanpeng Zhang, Jianhua Zeng
Summary: The emergence and expansion of parity-time (PT)-symmetric systems in various physical fields have been observed in the past decades, despite being non-Hermitian, they exhibit completely real spectra. While the exploration of nonlinear waves in low-dimensional PT-symmetric non-Hermitian systems has been extensive, understanding these systems in higher dimensions is still difficult. This study surveys matter-wave nonlinear gap modes of Bose-Einstein condensates in three-dimensional PT optical lattices with repulsive interparticle interactions, focusing on multidimensional gap solitons and vortices. Through theoretical and numerical simulations, stability and instability areas of localized modes within the linear band gap spectra are investigated. The study provides a deep and consistent understanding of the formation, structural property, and dynamics of coherent localized matter waves supported by PT optical lattices in multidimensional space, which opens up possibilities for exploring and stabilizing three-dimensional localized gap modes in non-Hermitian systems.
Article
Physics, Multidisciplinary
K. Ziegler
Summary: This paper studies the localization phenomenon of non-interacting quantum particles in a random system based on the broken particle-hole (PH) symmetry. Using a chiral symmetry argument and a Grassmann functional integral, diffusion at PH symmetry and localization caused by breaking the PH symmetry are explored.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Multidisciplinary
Yubin Deng, Jun Lin, Zhaoxu Sun, Weiyong Ye, Shihong Huang, Wu Zhang, Bingzhi Zhang
Summary: This study examines the influence of complex lattices with PT-symmetry on dynamic localization (DL) in optics, particularly higher-order DL. The intriguing finding is that the order of DL is equal to the frequency of light passing through the first Brillouin zone's boundary during a half-period of DL oscillation. DL is still possible below the PT-symmetry breaking point, but the beam power evolution differs from Bloch oscillation in PT-symmetry systems. Nonreciprocal beam propagation behavior is observed at the PT-symmetry breaking point, similar to optical Bloch oscillation in PT-symmetry systems.
Article
Chemistry, Physical
Bingyu Cui, Maxim Sukharev, Abraham Nitzan
Summary: Similar to a free particle, a broad wavepacket on an ordered lattice initially grows slowly and eventually spreads linearly with time. However, on a disordered lattice, the growth is inhibited for a long time due to Anderson localization. Through numerical simulations and analytical studies, we demonstrate that the short-term growth of particle distribution is faster on a disordered lattice than on an ordered one. This faster spread may have relevance to exciton motion in disordered systems.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Mathematics, Interdisciplinary Applications
Si-Liu Xu, Min Zhu, Jia-Xin Peng, Xi Fan, Qi-Hong Huang, Chun-Bo Hua, Yuan Zhao
Summary: This research proposes a scheme for creating stable light bullets in a cold Rydberg atomic gas system with PT symmetry moire optical lattices. By utilizing local and nonlocal Kerr nonlinearities and PT symmetry moire optical lattices, the researchers were able to obtain stable light bullets with different spatial and temporal distributions. The stability of the light bullets was evaluated through linear-stability analysis and direct simulation.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Fluids & Plasmas
L. S. Ramirez, P. M. Pasinetti, W. Lebrecht, A. J. Ramirez-Pastor
Summary: Numerical simulations and finite-size scaling analysis were conducted to study the percolation behaviors of straight rigid rods on triangular lattices, including standard and inverse percolation. The research found that percolation thresholds are dependent on the particle size k, exhibit symmetry, and have different characteristics in various models.
Article
Chemistry, Multidisciplinary
Hong Gou, Peng Shi, Zhijun Wan, Luchang Xiong, Bowen Fan, Zheng Zhen
Summary: Studying the impact of perforated symmetrical fissures on the mechanical properties of rock with a hole is of significant practical importance. The results indicate that increasing the dip angle of the fissures can control the deterioration effect on the hole-containing rock, while increasing the length of the fissures exacerbates the effect. The influence of the fissure dip angle on the displacement field near the hole decreases with increasing dip angle, while increasing the fissure length exacerbates the effect of fissures on the displacement field. As the angle between the fissure and the vertical principal stress increases, the degree of tensile failure weakens while the degree of shear failure increases. During the crack development phase, the extension of the stress concentration zone drives rapid crack growth, leading to a stress drop in the macroscopic mechanical properties and eventual rock destabilization damage.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Fuxi Lu, Hao Wu, Yi Liang, Liu Tan, Zhifu Tan, Xu Feng, Yi Hu, Yinxiao Xiang, Xubo Hu, Zhigang Chen, Jingjun Xu
Summary: The study introduces specially modulated autofocusing beams with improved trapping capabilities compared to unmodulated beams, particularly the Bessel-modulated beam showing enhanced optical trapping force. These modulated beams have the potential to serve as new photonic tools for optical trapping and manipulation, outperforming conventional circular Airy beams in optical tweezers applications.
Article
Chemistry, Multidisciplinary
Ambre Blanc, Antonio Monari, Jean Christophe Tremblay
Summary: This paper proposes a numerical method to localize many-electron excited states by defining a localization metric based on their representation as electron-hole pairs. The method allows for efficient localization and separation of excitons with different character in a complex molecular system at a low computational cost.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2023)
Article
Physics, Fluids & Plasmas
Michel Bauer, P. L. Krapivsky, Kirone Mallick
Summary: The study investigates the dynamics of random walks on homogeneous hypercubic lattices with multiplication at a fertile site, finding that the total number of walkers grows exponentially at a Malthusian rate in one and two dimensions. The behavior of walker numbers is determined by dimensionality and multiplication rate, with a critical regime showing anomalous growth. Interactions between walkers can significantly alter their behavior, with exclusion random walks exhibiting linear growth above a critical multiplication rate.
Article
Physics, Multidisciplinary
Bogdan Galilo, Derek K. K. Lee, Ryan Barnett
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Condensed Matter
Luca Mingarelli, Eric E. Keaveny, Ryan Barnett
JOURNAL OF PHYSICS-CONDENSED MATTER
(2016)
Article
Physics, Multidisciplinary
Sania Jevtic, Ryan Barnett
NEW JOURNAL OF PHYSICS
(2017)
Article
Physics, Multidisciplinary
Bogdan Galilo, Derek K. K. Lee, Ryan Barnett
PHYSICAL REVIEW LETTERS
(2017)
Article
Optics
Ryan Barnett
Article
Optics
Matjaz Payrits, Ryan Barnett
Article
Physics, Multidisciplinary
H. K. Pechkis, J. P. Wrubel, A. Schwettmann, P. F. Griffin, R. Barnett, E. Tiesinga, P. D. Lett
PHYSICAL REVIEW LETTERS
(2013)
Article
Physics, Multidisciplinary
Luca Mingarelli, Ryan Barnett
PHYSICAL REVIEW LETTERS
(2019)
Article
Materials Science, Multidisciplinary
Joseph Sykes, Ryan Barnett
Summary: This paper presents a 1D marker method that can be applied to quasiperiodic and aperiodic systems, and verifies its effectiveness in studying the topological properties of different quasicrystal Hamiltonians.
MATERIALS FOR QUANTUM TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
J. Jager, R. Barnett
Summary: The study utilized the Keldysh path-integral formalism to develop a method to model the dynamics of a quantum impurity in a degenerate Bose gas, revealing the significant role of quantum corrections and thermal effects on the impurity momentum under weak to intermediate impurity-bath couplings, as well as the broadening of the absorption spectrum with increasing temperature.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Joseph Sykes, Ryan Barnett
Summary: Local topological markers are valuable tools for investigating systems with nontrivial bands, treating translationally invariant and spatially inhomogeneous systems equally. The Chern marker, available for two-dimensional systems, is generalized to one-dimensional and three-dimensional systems in this paper. General derivations are provided and the markers are verified numerically using model Hamiltonians, paving the way for future studies on the influence of disorder on topological pumping and phase transitions in odd-dimensional systems.
Article
Physics, Multidisciplinary
J. Jager, R. Barnett, M. Will, M. Fleischhauer
PHYSICAL REVIEW RESEARCH
(2020)
Article
Optics
Luca Mingarelli, Eric E. Keaveny, Ryan Barnett
Article
Optics
Matjaz Payrits, Ryan Barnett
Article
Optics
J. P. Wrubel, A. Schwettmann, D. P. Fahey, Z. Glassman, H. K. Pechkis, P. F. Griffin, R. Barnett, E. Tiesinga, P. D. Lett