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- University of Science and Technology of ChinaCN41 papers
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16 papers · 1 filter
Possibility of superradiant phase transitions in coupled two-level atoms
Tao Liu, Yu-Yu Zhang, Qing-Hu Chen +1
Although the oscillator strength sum rule forbids the phase transition in ideal non-interacting two-level atoms systems, we present the possibility of the quantum phase transition…
Spectrally multiplexed heralded single photon source at telecom-band
Hao Yu, Chenzhi Yuan, Ruiming Zhang +9
Heralded single photon source (HSPS) is an important way in generating genuine single photon, having advantages of experimental simplicity and versatility. However, HSPS intrinsica…
Parity breaking and scaling behavior in light-matter interaction
T. Liu, M. Feng, W. L. Yang +4
The light-matter interaction described by Rabi model and Jaynes-Cummings (JC) model is investigated by parity breaking as well as the scaling behavior of ground-state population-in…
Exact solvability of the quantum Rabi models within Bogoliubov operators
Qing-Hu Chen, Chen Wang, Shu He +2
The quantum Rabi model can be solved exactly by the Bargmann transformation from real coordinate to complex variable recently [Phys. Rev. Lett. \textbf{107}, 100401 (2011)]. By the…
Unified analytical treatments to qubit-oscillator systems
Shu He, Yu-Yu Zhang, Qing-Hu Chen +3
An effective scheme within two displaced bosonic operators with equal positive and negative displacements is extended to study qubit-oscillator systems analytically in an unified w…
No spin-localization phase transition in the spin-boson model without local field
Tao Liu, Mang Feng, Lei Li +2
We explore the spin-boson model in a special case, i.e., with zero local field. In contrast to previous studies, we find no possibility for quantum phase transition (QPT) happening…