Zero-current persistent potential drop across small-capacitance Josephson junctions

Journal Article · Tue Sep 01 04:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.3548· OSTI ID:6134346

Buettiker, M

Quantum effects in a small-capacitance Josephson junction coupled capacitively to an external circuit are investigated. Capacitive coupling permits one to control the charge on the junction and to hold the junction in an equilibrium state. The equilibrium state is characterized by a persistent voltage drop without an accompanying dc current. The persistent voltage is a periodic function of the control charge with period 2e if Cooper pairs only are present and with period e if quasiparticles are included. In the capacitively coupled junction, Bloch oscillations are induced by increasing the control charge linearly in time. The presence of a persistent voltage drop is reflected in the small-signal impedance of the circuit which describes the response of the junction to an oscillating control charge superimposed on a static control charge. The impedance reveals features which seem closely related to experimental observations by Lambe and Jaklevic (Phys. Rev. Lett. 22, 1371 (1969)) on a normal array of capacitively coupled junctions.

• Research Organization: IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
• OSTI ID: 6134346
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BLOCH THEORY
CAPACITANCE
COOPER PAIRS
ELECTRIC IMPEDANCE
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
IMPEDANCE
JOSEPHSON JUNCTIONS
JUNCTIONS
MECHANICS
OSCILLATIONS
PHYSICAL PROPERTIES
QUANTUM MECHANICS
QUASI PARTICLES
SUPERCONDUCTING JUNCTIONS