Quantum fluctuations in thin superconducting wires of finite length.
In one-dimensional wires, fluctuations destroy superconducting long-range order and stiffness at finite temperatures; in an infinite wire, quasi-long-range order and stiffness survive at zero temperature if the wire's dimensionless admittance mu is large, mu>2. We analyze the disappearance of this superconductor-insulator quantum phase transition in a finite wire and its resurrection due to the wire's coupling to its environment characterized through the dimensionless conductance K.
Theoretische Physik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland.
H P
HP
Büchler
V B
VB
Geshkenbein
G
G
Blatter