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Quantum tricriticality of chiral-coherent phase in quantum Rabi triangle | | Yu-Yu Zhang
; Zi-Xiang Hu
; Libin Fu
; Hong-Gang Luo
; Xue-Feng Zhang
; | | Date: |
23 Nov 2020 | | Abstract: | The interplay of strong interactions, symmetries and gauge fields usually
intrigues quantum many-body phases. To explore the nature of emerging phases,
we study a quantum Rabi triangle system as an elementary building block for
synthesizing an artificial magnetic field. Using an exact solution, we find a
novel quantum criticality of phase diagram and an interesting chiral-coherent
phase, which breaks the $mathbb{Z}_2$ symmetry and chiral symmetry. In such
chiral phase, photons in eigenstates flow unidirectionally and the chirality
can be tuned by the gauge field, exhibiting a signature of broken time-reversal
symmetry. The finite-frequency scaling exponent analysis further confirms to be
in the universality class of the Dicke model. Our work suggests a fundamental
unit cell for engineering quantum phases by manipulating photons in an
artificial magnetic field. | | Source: | arXiv, 2011.11171 | | Services: | Forum | Review | PDF | Favorites | |
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