scholarly journals Quantum dynamics of attractive versus repulsive bosonic Josephson junctions: Bose-Hubbard and full-Hamiltonian results

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
Kaspar Sakmann ◽  
Alexej I. Streltsov ◽  
Ofir E. Alon ◽  
Lorenz S. Cederbaum
Keyword(s):  
Josephson Junctions ◽  
Quantum Dynamics

Quantum dynamics of the phase difference in an assembly of closed 0–π Josephson junctions made by d- and s-wave superconductors

2007 ◽  
Vol 460-462 ◽  
pp. 1305-1306 ◽  
Author(s):  
Tomio Koyama ◽  
Masahiko Machida ◽  
Masaru Kato ◽  
Takekazu Ishida
Keyword(s):  
Phase Difference ◽  
Josephson Junctions ◽  
Quantum Dynamics ◽  
S Wave

Cooper pair transport and macroscopic quantum dynamics in Josephson junctions through ferromagnetic insulators

2008 ◽  
Vol 468 (7-10) ◽  
pp. 701-704 ◽  
Author(s):  
Shiro Kawabata ◽  
Yasuhiro Asano ◽  
Yukio Tanaka ◽  
Satoshi Kashiwaya ◽  
Alexander A. Golubov
Keyword(s):  
Josephson Junctions ◽  
Quantum Dynamics ◽  
Cooper Pair ◽  
Macroscopic Quantum

scholarly journals TWO-DIMENSIONAL MACROSCOPIC QUANTUM DYNAMICS IN YBCO JOSEPHSON JUNCTIONS

2009 ◽  
Vol 23 (20n21) ◽  
pp. 4329-4337 ◽  
Author(s):  
SHIRO KAWABATA ◽  
TAKEO KATO ◽  
FLORIANA LOMBARDI ◽  
THILO BAUCH
Keyword(s):  
Josephson Junctions ◽  
Quantum Dynamics ◽  
Thermal Activation ◽  
Escape Rate ◽  
Slight Reduction ◽  
Two Dimensional ◽  
Macroscopic Quantum ◽  
Phase Dynamics ◽  
Lc Circuit ◽  
Macroscopic Quantum Tunneling

We theoretically study classical thermal activation (TA) and macroscopic quantum tunneling (MQT) for a YBa 2 Cu 3 O 7-δ( YBCO ) Josephson junction coupled with an LC circuit. The TA and MQT escape rate are calculated by taking into account the two-dimensional nature of the classical and quantum phase dynamics. We find that the MQT escape rate is largely suppressed by the coupling to the LC circuit. On the other hand, this coupling leads to the slight reduction of the TA escape rate. These results are relevant for the interpretation of a recent experiment on the MQT and TA phenomena in YBCO bi-epitaxial Josephson junctions.

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