Journal
PHYSICAL REVIEW A
Volume 97, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.97.032341
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Funding
- DFG Schwerpunktsprogramm Giant Interactions in Rydberg Systems [GiRyd SPP 1929]
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We consider state transfer between two qubits-effective two-level systems represented by Rydberg atoms-via a common mode of amicrowave cavity at finite temperature. We find that when both qubits have the same coupling strength to the cavity field, at large enough detuning from the cavity mode frequency, quantum interference between the transition paths makes the SWAP of the excitation between the qubits largely insensitive to the number of thermal photons in the cavity. When, however, the coupling strengths are different, the photon-number-dependent differential Stark shift of the transition frequencies precludes efficient transfer. Nevertheless, using an auxiliary cooling system to continuously extract the cavity photons, we can still achieve a high-fidelity state transfer between the qubits.
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