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Abstract:
We propose a general approach to implement ultrafast nonadiabatic geometric single- and two-qubit gates by employing counter-rotating effects. This protocol is compatible with most optimal control methods used in previous rotating-wave approximation (RWA) protocols; thus, it is as robust as (or even more robust than) the RWA protocols. Using counter-rotating effects allows us to apply strong drives. Therefore, we can improve the gate speed by 5-10 times compared to the RWA counterpart for implementing high-fidelity (≥99.99%) gates. Such an ultrafast evolution (nanoseconds, even picoseconds) significantly reduces the influence of decoherence (e.g., the qubit dissipation and dephasing). Moreover, because the counter-rotating effects no longer induce a gate infidelity (in both the weak and strong driving regimes), we can achieve a higher fidelity compared to the RWA protocols. Therefore, in the presence of decoherence, one can implement ultrafast geometric quantum gates with ≥99% fidelities. © 2022 American Physical Society.
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Physical Review Applied
Year: 2022
Issue: 6
Volume: 18
4 . 6
JCR@2022
3 . 8 0 0
JCR@2023
ESI HC Threshold:55
JCR Journal Grade:2
CAS Journal Grade:2
Cited Count:
SCOPUS Cited Count: 12
ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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