TY - JOUR
T1 - Adiabatic speedup in a non-Markovian quantum open system
AU - Wang, Zhao Ming
AU - Luo, Da Wei
AU - Byrd, Mark S.
AU - Wu, Lian Ao
AU - Yu, Ting
AU - Shao, Bin
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/12/27
Y1 - 2018/12/27
N2 - Adiabatic quantum computation requires keeping a system in a particular eigenstate. However, unwanted transitions can occur due to the interaction of the system with a noisy environment. The adiabatic evolution of the system will then be ruined. To reduce the effect of the environment, quantum control methods can be used. This allows one to speed up the adiabatic process. Here we present an effective control scheme to allow for a speedup of the adiabatic process by using a sequence of pulses on the system. Using the hierarchical functional derivative (HFD) approach, we calculate the fidelity evolution, which is a measure of the adiabaticity in an open system. By carefully choosing the pulse intensity and duration, an accelerated adiabatic path can be obtained for both a weak-coupling and a strong non-Markovian environment.
AB - Adiabatic quantum computation requires keeping a system in a particular eigenstate. However, unwanted transitions can occur due to the interaction of the system with a noisy environment. The adiabatic evolution of the system will then be ruined. To reduce the effect of the environment, quantum control methods can be used. This allows one to speed up the adiabatic process. Here we present an effective control scheme to allow for a speedup of the adiabatic process by using a sequence of pulses on the system. Using the hierarchical functional derivative (HFD) approach, we calculate the fidelity evolution, which is a measure of the adiabaticity in an open system. By carefully choosing the pulse intensity and duration, an accelerated adiabatic path can be obtained for both a weak-coupling and a strong non-Markovian environment.
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U2 - 10.1103/PhysRevA.98.062118
DO - 10.1103/PhysRevA.98.062118
M3 - Article
AN - SCOPUS:85059367876
SN - 2469-9926
VL - 98
JO - Physical Review A
JF - Physical Review A
IS - 6
M1 - 062118
ER -