论文标题
谐振约瑟夫森连接处的量子相滑动
Quantum phase slips in a resonant Josephson junction
论文作者
论文摘要
我们研究了库珀对共振隧穿的后果在约瑟夫森交界处发生的量子相滑。在约瑟夫森势屏障下的量子隧道的幅度通过绝热通道的Landau-Zener通过Andreev级别的交叉点进行了修改，从而抑制了$2π$相位滑动。结果，接近共鸣，$4π$相滑成为主要的隧道过程。我们通过确定Transmon电路的能量光谱来说明这种交叉，表明即使在完美的透明度下，残留电荷分散剂仍然存在。
We investigate the consequences of resonant tunneling of Cooper pairs on the quantum phase slips occurring in a Josephson junction. The amplitude for quantum tunneling under the Josephson potential barrier is modified by the Landau-Zener amplitude of adiabatic passage through an Andreev level crossing, resulting in the suppression of $2π$ phase slips. As a consequence, close to resonance, $4π$ phase slips become the dominant tunneling process. We illustrate this crossover by determining the energy spectrum of a transmon circuit, showing that a residual charge dispersion persists even at perfect transparency.
