非均匀量子相变的动力学
Dynamics of an inhomogeneous quantum phase transition
摘要：
我们认为，在二阶量子相变驱动的准粒子激发的非均匀淬火密度被抑制时，临界点传播的速度低于阈值速度等于Kibble-Zurek相关长度倍的能隙在冻结除以$\hbar$。这个一般的预测得到了量子伊辛链的解析解的支持。我们的研究结果表明，特别是，绝热量子计算机可以更绝热时，在一个“非均匀”的方式操作。
英文摘要：
We argue that in a second order quantum phase transition driven by an inhomogeneous quench density of quasiparticle excitations is suppressed when velocity at which a critical point propagates across a system falls below a threshold velocity equal to the Kibble-Zurek correlation length times the energy gap at freeze-out divided by $\hbar$. This general prediction is supported by an analytic solution in the quantum Ising chain. Our results suggest, in particular, that adiabatic quantum computers can be made more adiabatic when operated in an "inhomogeneous" way.
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