Super-radiant phase transition in superconducting circuit in thermal equilibrium

Abstract

We propose a superconducting circuit that shows a super-radiant phase transition (SRPT) in the thermal equilibrium. The existence of the SRPT is confirmed analytically in the limit of an infinite number of artificial atoms. We also perform numerical diagonalization of the Hamiltonian with a finite number of atoms and observe an asymptotic behavior approaching the infinite limit as the number of atoms increases. The SRPT can also be interpreted intuitively in a classical analysis.

8 pages, 3 figures

References in corpus (3)

• Is there a no-go theorem for superradiant quantum phase transitions in cavity and circuit QED ?
• Ultrastrong coupling phenomena beyond the Dicke model
• Stability of polarizable materials against superradiant phase transition

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