title: Quantum dynamics of a d-wave Josephson junction.
abstract: 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.
authors.affiliation: Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, MC2, Chalmers University of Technology, S-412 96 Göteborg, Sweden.
authors.forename: Thilo
authors.initials: T
authors.lastname: Bauch
authors.forename: Tobias
authors.initials: T
authors.lastname: Lindström
authors.forename: Francesco
authors.initials: F
authors.lastname: Tafuri
authors.forename: Giacomo
authors.initials: G
authors.lastname: Rotoli
authors.forename: Per
authors.initials: P
authors.lastname: Delsing
authors.forename: Tord
authors.initials: T
authors.lastname: Claeson
authors.forename: Floriana
authors.initials: F
authors.lastname: Lombardi