CMSP Seminar Series @ICTP Stasi Seminar Room WEDNESDAY 8 February at 11:00: Yingdan WANG

[Condensed Matter Section]

ICTP Seminar Series in Condensed Matter and Statistical Physics
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KINDLY NOTE DIFFERENT DAY/TIME IN THE WEEK

Wednesday  8 February at 11:00 a.m.

Luigi Stasi Seminar Room, first floor, ICTP Leonardo building
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Speaker: Yingdan WANG (ITP and CSRC, Beijing, People's Republic of China)

Title: Optimized STIRAP-type State Transfer in Solid-State Quantum Devices

Abstract:

Great improvements in the coherent control of solid-state devices has 
led to remarkable demonstrations of STIRAP in superconducting qubits, 
optomechanical systems, NV centers, and so on. However, differently from 
atomic systems, most solid-state quantum devices suffer significant 
dissipation, thus theà prolonged operation time of STIRAP (required by 
adiabaticity) becomes a severe drawback. In these examples the trade-off 
between adiabaticity and decoherence is a central issue, which has been 
investigated numerically but no analytical conclusion has been made. In 
order to provide physical insight and understand the power of STIRAP in 
the realistic scenario, we have pursued an analytical treatment with 
full consideration of the system dissipation. We find that optimizing 
the transfer time rather than coupling profiles leads to a significant 
improvement of the transfer fidelity. The upper bound of the fidelity 
has been found as a simple analytical function of system 
cooperativities. We also provide a systematic approach to reach this 
upper bound efficiently. By including the dissipation of all the 
parties, our results are widely applicable to quantum state engineering 
and are particularly relevant for solid-state devices.