论文标题
受奇偶校验保护的超导体 - 体积量子
A Parity-Protected Superconductor-Semiconductor Qubit
论文作者
论文摘要
通过实施保护超导岛上库珀对的奇偶校验的设计，可以改善超导码头的连贯性。在这里，我们基于电压控制的半导体纳米线约瑟夫森连接介绍了一个平等保护的Qubit，利用了较小的谐波关系中的较高谐波含量。由两个这样的连接形成的对称干涉仪，将栅极调整为平衡，并被半量化的通量挫败，产生了一个cos（2 ϕ）约瑟夫森元素，反映了库珀对的连贯运输。我们证明，可以通过调节受保护的制度来抑制量子的松弛。
Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson junctions, taking advantage of the higher harmonic content in the energy-phase relation of few-channel junctions. A symmetric interferometer formed by two such junctions, gate-tuned into balance and frustrated by a half-quantum of applied flux, yields a cos(2ϕ) Josephson element, reflecting coherent transport of pairs of Cooper pairs. We demonstrate that relaxation of the qubit can be suppressed tenfold by tuning into the protected regime.
