Optimal gauge for the multimode Rabi model in circuit QED
In circuit QED, a Rabi model can be derived by truncating the Hilbert space of an anharmonic qubit coupled to a resonator. This truncation breaks the gauge invariance present in the full Hamiltonian. Here we derive a simple criterion for an optimal gauge such that the differences between the truncat...
Main Authors: | Marco Roth, Fabian Hassler, David P. DiVincenzo |
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Format: | Article |
Language: | English |
Published: |
American Physical Society
2019-11-01
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Series: | Physical Review Research |
Online Access: | http://doi.org/10.1103/PhysRevResearch.1.033128 |
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