Andreev State in Hybrid Superconducting Nanowires

The Quantum-Field Approach to Superconductivity Theory

“…The self-energy part that has thus arisen in the nuclear energy is the source of the line shape of the nuclear magnetic resonance. 23 The spin-lattice relaxation time of the nuclear spin I z is given by the imaginary part of the magnetic susceptibility zz , which is equal to +− + −+ /2 in the spatially homogeneous system. Here, ± correspond to I x ± iI y /2, respectively.…”

“…An elegant theory has been provided by Kubo and Tomita, 22 and revised by us with the temperature Green function. 23 The spin-lattice relaxation time T 1 increases remarkably in a superconductor just below the critical temperature. This is explained by the BCS pairing theory and is said to be its brilliant triumph.…”