R. A. Pinto and S. Flach 2007 EPL 79 66002 doi:10.1209/0295-5075/79/66002
R. A. Pinto and S. Flach
Show affiliationsWe consider the quantum dynamics of excitations in a system of two capacitively coupled Josephson junctions. Quantum breather states are found in the middle of the energy spectrum of the confined nonescaping states of the system. They are characterized by a strong excitation of one junction. These states perform slow tunneling motion from one junction to the other, while keeping their coherent nature. The tunneling time sensitively depends on the initial excitation energy. By using an external bias as a control parameter, the tunneling time can be varied with respect to the escape time and the experimentally limited coherence time. Thus, one can control the flow of quantum excitations between the two junctions.
74.50.+r Tunneling phenomena; point contacts, weak links, Josephson effects
Issue 6 (September 2007)
Received 25 May 2007, accepted for publication 25 July 2007
Published 8 August 2007
R. A. Pinto and S. Flach 2007 EPL 79 66002
C. H. Chen et al. 2007 ApJ 666 466
C. H. Chen et al. 2005 ApJ 623 493
Larry Kirby 2009 ApJ 694 1056
V. Belokurov et al. 2007 ApJ 654 897
M Velli and F Pruneti 1997 Plasma Phys. Control. Fusion 39 B317
M R Benoit et al 2008 Phys. Biol. 5 046007
Derek Vollmer 2009 Environ. Res. Lett. 4 024003
V R Chechetkin and A Y Turygin 1994 J. Phys. A: Math. Gen. 27 4875
Hans Binder and Stephan Preibisch 2006 J. Phys.: Condens. Matter 18 S537