Rminder 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: Stimulated Raman Adiabatic Passage (STIRAP) is a method 
developed more than two decades ago for population transfer in 
Lambda-type atoms using lasers, with the aim of avoiding an 
intermediate noisy level. Due to the advantages of being robust, simple, 
and efficient, STIRAP and its theoretical extensions have found a large 
variety of applications in atomic and molecular physics, chemistry, as 
well as quantum information processing. Most recently, the coherent 
control of solid-state devices has led to remarkable demonstrations of 
STIRAP with superconducting qubits, optomechanical systems, and NV 
centers. However, differently from atomic systems, most solid-state 
quantum devices suffer significant dissipation, thus the prolonged 
operation time of STIRAP (required by adiabaticity) becomes a severe 
drawback. In order to provide physical insight and understand the 
ultimate power of STIRAP, we have pursued an analytical treatment with 
full consideration of 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 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.