Quantum Rabi hexagonal ring in an artificial magnetic field
- URL: http://arxiv.org/abs/2304.01535v1
- Date: Tue, 4 Apr 2023 05:16:46 GMT
- Title: Quantum Rabi hexagonal ring in an artificial magnetic field
- Authors: Lin-Jun Li, Li-Lu Feng, Jia-Hao Dai, Yu-Yu Zhang
- Abstract summary: We present exotic quantum phases in a quantum Rabi hexagonal ring.
An artificial magnetic field applied in the ring induces an effect magnetic flux in the even and odd subring.
It gives rise to two chiral quantum phases besides a ferro-superradiant and an antiferro-superradiant phases.
- Score: 8.6188479789914
- License: http://creativecommons.org/publicdomain/zero/1.0/
- Abstract: We present exotic quantum phases in a quantum Rabi hexagonal ring, which is
derived by an analytical solution. We find that an artificial magnetic field
applied in the ring induces an effect magnetic flux in the even and odd
subring. It gives rise to two chiral quantum phases besides a
ferro-superradiant and an antiferro-superradiant phases. With analogy to the
magnetic system, two chiral phases are distinguished by the magnetization
orientation in the $xy$ plane in two subrings, which correspond to skyrmion
structures with different vorticity. In such chiral phases, photons in the
subrings triangle flow in the same or opposite directions by comparing to the
current in the hexagonal ring, which depend on the signs of the induced
magnetic flux in the subrings. Interestingly, the critical exponents of the
excitation energy in two chiral phases are the same as that of the subring
triangle, exhibiting subring-size dependent critical exponents. Our analysis
can be straightforwardly extended to a larger lattice size with subrings of a
triangular or hexagonal structure, predicting a novel universality class of
superradiant phase transitions. An implementation of the system considered is
an exciting prospect in quantum many-body simulations of light-matter
interactions in future.
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