Quantum dynamics of a d-wave Josephson junction.
Here we present the direct observation of macroscopic quantum properties in an all high-critical-temperature superconductor d-wave Josephson junction. Although dissipation caused by low-energy excitations is expected to strongly suppress macroscopic quantum effects, we demonstrate energy level quantization in our d-wave Josephson junction. The result indicates that the role of dissipation mechanisms in high-temperature superconductors has to be revised, and it may also have consequences for the class of solid-state "quiet" quantum bits with superior coherence time.
Bauch
Thilo
T
Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, MC2, Chalmers University of Technology, S-412 96 Göteborg, Sweden.
Lindström
Tobias
T
Tafuri
Francesco
F
Rotoli
Giacomo
G
Delsing
Per
P
Claeson
Tord
T
Lombardi
Floriana
F