Using two cyclic three-level artificial atoms, we propose a scheme for realizing two-qubit quantum phase gates via an
unconventional geometric phase shift in a cavity. In this scheme, the excited states of the two artificial atoms are
adiabatically eliminated, and the logical gates' operation only involves their metastable states. Moreover, under certain
conditions, the artificial atoms are disentangled with the cavity mode. Thus the gate is insensitive to both the cavity
decay and the spontaneous emission of the artificial atoms.
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