Zobrazeno 1 - 10
of 233 668
pro vyhledávání: '"Song Z"'
Autor:
Liu, Z., Shi, Y., Jiang, T., Luo, L., Huang, C., Mootz, M., Song, Z., Yan, Y., Yao, Y., Zhao, J., Wang, J.
Publikováno v:
PRX Energy, 3, 023009 (2024)
Entropy transfer in metal halide perovskites, characterized by significant lattice anharmonicity and low stiffness, underlies the remarkable properties observed in their optoelectronic applications, ranging from solar cells to lasers. The conventiona
Externí odkaz:
http://arxiv.org/abs/2405.03071
Autor:
Zhang, C. H., Song, Z.
Exceptional points (EPs), as an exclusive feature of a non-Hermitian system, support coalescing states to be alternative stable state beyond the ground state. In this work, we explore the influence of non-Hermitian impurities on the dynamic formation
Externí odkaz:
http://arxiv.org/abs/2404.13297
Autor:
Zhang, H. P., Song, Z.
In the Hermitian regime, the Wannier-Stark ladder characterizes the eigenstates of an electron in a periodic potential with an applied static electric field. In this work, we extend this concept to the complex regime for a periodic non-Hermitian syst
Externí odkaz:
http://arxiv.org/abs/2404.02399
Publikováno v:
Phys. Rev. B 109, 115406 (2024)
A three-dimensional non-Hermitian Hamiltonian with parity-time symmetry can exhibit a closed exceptional surface (EP surface) in momentum space, which is a non-Hermitian deformation of the degeneracy line (DL). Since the degeneracy line lacks an inte
Externí odkaz:
http://arxiv.org/abs/2402.00953
Autor:
Zhang, K. L., Song, Z.
Publikováno v:
Phys. Rev. B 109, 104312 (2024)
We investigate the impacts of an imaginary transverse field on the dynamics of magnetic domain walls in a quantum Ising chain. We show that an imaginary field plays a similar role as a real transverse field in forming a low-lying Wannier-Stark ladder
Externí odkaz:
http://arxiv.org/abs/2401.17586
We study the dynamics of the non-Hermitian Floquet Wannier-Stark system in the framework of the tight-binding approximation, where the hopping strength is a periodic function of time with Floquet frequency $\omega$. It is shown that the energy level
Externí odkaz:
http://arxiv.org/abs/2401.13286
Topological characteristics in quantum systems typically determine the ground state, while the corresponding quantum phase transition (QPT) can be identified through quenching dynamics. Based on the exact results of extended Kitaev chains, we demonst
Externí odkaz:
http://arxiv.org/abs/2311.08056
In general, the summation of a set of sub-Hamiltonians cannot share a common eigenstate of each one, only if it is an unentangled product state, such as a phantom helix state in quantum spin system. Here we present a method, referred to as the buildi
Externí odkaz:
http://arxiv.org/abs/2310.11786
We propose an extended Bogoliubov transformation in real space for spinless fermions, based on which a class of Kitaev chains of length $2N$ with zero chemical potential can be mapped to two independent Kitaev chains of length $N$. It provides an alt
Externí odkaz:
http://arxiv.org/abs/2310.05006
The condensate of the Bardeen-Cooper-Schrieffer (BCS) pair in the ground state, which may contain information on both topology and spin pairing, promises the superconductivity of the system. In this paper, we study a singlet-triplet spin paring model
Externí odkaz:
http://arxiv.org/abs/2309.16341