AI 中文总结
研究超导纳米结中非平衡安德列夫态的量子动力学，借助微观理论推导有效哈密顿量，求解类薛定谔方程得到“波函数”并评估电流，发现安德列夫态量子干涉可使超电流产生相干振荡，对有扩散势垒的结有新效应。
AI 中文摘要
借助微观理论，我们推导了一个有效哈密顿量，用以控制超导纳米结中非平衡安德列夫态的量子动力学。通过求解相应的类薛定谔方程，我们得到了安德列夫能级的“波函数”，并在存在外部电压偏置的情况下评估了结上的电流。我们证明，在势垒透射率略低于1的结中，安德列夫态的量子干涉可能会产生作为约瑟夫森相位函数的超电流的明显相干振荡。对于具有扩散势垒的结，预计这种新效应会有进一步的影响。
英文摘要
With the aid of a microscopic theory we derive an effective Hamiltonian that controls quantum dynamics of Andreev states in superconducting nanojunctions out of equilibrium. Resolving the corresponding Schrödinger-like equation we obtain the "wave functions" for Andreev levels and evaluate electric current across the junction in the presence of an external voltage bias. We demonstrate that quantum interference of Andreev states may yield pronounced coherent oscillations of the supercurrent as a function of the Josephson phase in junctions with barrier transmissions slightly below unity. Further implications of this novel effect are expected for junctions with diffusive barriers.
Comments7 pages, 4 figures
Journal refPhys. Rev. Lett. 137, 076004 (2026)
