Andreev bound states and $\pi$-junction transition in a superconductor / quantum-dot / superconductor system

Yu Zhu, Qing-feng Sun, Tsung-han Lin

We study Andreev bound states and $\pi$-junction transition in a superconductor / quantum-dot / superconductor (S-QD-S) system by Green function method. We derive an equation to desc…