硬核玻色子在Rosen-Zener猝灭下的超流生存
Supercurrent survival under Rosen-Zener quench of hard core bosons
摘要：
我们研究了在一个不可穿透玻色子系统中超流的生存，该系统受到从临界超流相到绝缘相的量子猝灭。我们表明，当前的演变时，淬火遵循罗森-齐纳配置文件是完全可解的。这使我们能够分析任意速率的淬火，从超流体的突然破坏到间隙的缓慢打开。电流的衰减和振荡的解析推导，并研究了数值随着失超后的动量分布。在小电流增强$ν$的情况下，我们发现长时间的电流存活与$ν^3$成正比。
英文摘要：
We study the survival of super-currents in a system of impenetrable bosons subject to a quantum quench from its critical superfluid phase to an insulating phase. We show that the evolution of the current when the quench follows a Rosen-Zener profile is exactly solvable. This allows us to analyze a quench of arbitrary rate, from a sudden destruction of the superfluid to a slow opening of a gap. The decay and oscillations of the current are analytically derived, and studied numerically along with the momentum distribution after the quench. In the case of small supercurrent boosts $ν$, we find that the current surviving at long times is proportional to $ν^3$.
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