Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Xiang-You Chen"'
Publikováno v:
Physical Review A. 103
In this work, the anisotropic variant of the quantum Rabi model with different coupling strengths of the rotating and counter-rotating wave terms is studied by the Bogoliubov operator approach. The anisotropy preserves the parity symmetry of the orig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30f35eda4ff2c45e5032efea9fb235ad
https://doi.org/10.1103/physreva.103.043708
https://doi.org/10.1103/physreva.103.043708
Publikováno v:
Physical Review A. 101
We develop a coherent-squeezed-state expansion for the ground state of the quantum phase transition in the quantum Rabi model. The wave function undergoes a transition from a localized state in the normal phase to a two-peaks delocalized state in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::057f65129a104a5b8aeb5513a1e564ad
https://doi.org/10.1103/physreva.101.033827
https://doi.org/10.1103/physreva.101.033827
In this paper, we analyze the quantum criticality of the Rabi-Stark model at finite ratios of the qubit and cavity frequencies in terms of the energy gap, the order parameter, as well as the fidelity, if the Stark coupling strength is the same as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f06411a8d8baf3ca69a6803a3de4923a
http://arxiv.org/abs/2001.04356
http://arxiv.org/abs/2001.04356
Various quantum phase transitions in the anisotropic Rabi-Stark model with both the nonlinear Stark coupling and the linear dipole coupling between a two-level system and a single-mode cavity are studied in this work. The first-order quantum phase tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c98840f2315096f56c1a3b63c076767
http://arxiv.org/abs/1912.10042
http://arxiv.org/abs/1912.10042
Autor:
Xiang-You Chen, Yu-Yu Zhang
Publikováno v:
Physical Review A. 96
A novel, unexplored nonperturbative deep-strong coupling (npDSC) achieved in superconducting circuits has been studied in the anisotropic Rabi model by the generalized squeezing rotating-wave approximation (GSRWA). Energy levels are evaluated analyti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d8c029e3884ad62da60dd5ed7602338
https://doi.org/10.1103/physreva.96.063821
https://doi.org/10.1103/physreva.96.063821
Autor:
Yu-Yu Zhang, Xiang-You Chen
The Hamiltonian of the two-photon Dicke model is diagonalized for the normal phase and super-radiant phase beyond the mean-field method respectively, giving the critical coupling strength. Besides a spectral collapse, the super-radiant phase transiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edbb613dd8f17d46b1f567961fc8119e
http://arxiv.org/abs/1711.09683
http://arxiv.org/abs/1711.09683
Publikováno v:
Physical Review A. 94
We present analytical solutions to three qubits and a single-mode cavity coupling system beyond the rotating-wave approximation (RWA). The zero-th order approximation gives correct solutions when the qubits are far detuned from the cavity. The first
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df70fd1f29f7b4d78ca5b8da0437c727
https://doi.org/10.1103/physreva.94.012317
https://doi.org/10.1103/physreva.94.012317
Autor:
Xiang-You Chen, Yu-Yu Zhang
Publikováno v:
The European Physical Journal D. 69
Quantum Fisher information (QFI) of the reduced two-atom state is employed to capture the quantum criticality of the superradiant phase transition in the Dicke model in the infinite size and finite-$N$ systems respectively. The analytical expression
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::001e1a0508c6dcb12040a3446cdabb90
https://doi.org/10.1140/epjd/e2015-60323-1
https://doi.org/10.1140/epjd/e2015-60323-1
Publikováno v:
Physical Review A: Atomic, Molecular & Optical Physics. Jul2016, Vol. 94 Issue 1, p1-1. 1p.