论文标题

重新访问绝热定理:绝热通道的出乎意料的良好表现

Adiabatic theorem revisited: the unexpectedly good performance of adiabatic passage

论文作者

Benseny, Albert, Mølmer, Klaus

论文摘要

绝热通道采用缓慢不同的时间依赖性的哈密顿量来控制沿哈密顿特征态的量子系统的演变。对于有限持续时间的过程,确切的时间不断发展的状态可能会在中间时间偏离绝热特征状态,但是在许多应用中,观察到这种偏差达到最大值,然后在过程结束时大大降低。我们为这一欢迎但通常没有欣赏的事实提供了简单的理论解释。我们的分析强调了高保真状态到国家转移的单独绝热标准,并指出了新的有效捷径策略,以实现近乎绝热动态。

Adiabatic passage employs a slowly varying time-dependent Hamiltonian to control the evolution of a quantum system along the Hamiltonian eigenstates. For processes of finite duration, the exact time evolving state may deviate from the adiabatic eigenstate at intermediate times, but in numerous applications it is observed that this deviation reaches a maximum and then decreases significantly towards the end of the process. We provide a straightforward theoretical explanation for this welcome but often unappreciated fact. Our analysis emphasizes a separate adiabaticity criterion for high fidelity state-to-state transfer and it points to new effective shortcut strategies for near adiabatic dynamics.

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