Effect of the Coulomb blockade of Cooper pairs on the dynamic properties of small-size Josephson junctions

2003 ◽  
Vol 48 (4) ◽  
pp. 519-522 ◽  
Author(s):  
I. N. Askerzade
Keyword(s):  
Coulomb Blockade ◽  
Josephson Junctions ◽  
Dynamic Properties ◽  
Cooper Pairs

Effect of thermal fluctuations on dynamics of small Josephson junctions

2019 ◽  
Vol 33 (25) ◽  
pp. 1950306
Author(s):  
I. N. Askerzade
Keyword(s):  
Josephson Junction ◽  
Coulomb Blockade ◽  
Josephson Junctions ◽  
Thermal Fluctuations ◽  
Energy Ratio

In this study, we carried out the analysis of the thermal fluctuations on the dynamics of small Josephson junction (JJ). An expression for the fluctuation of Coulomb blockade edge in the case of low and high growing rate of voltage was obtained. It was shown that dynamics of small-sized JJ under thermal fluctuations is determined by the energy ratio-parameter, temperature and growing rate of voltage.

Coulomb blockade and incoherent tunneling of Cooper pairs in ultrasmall junctions affected by strong quantum fluctuations

1991 ◽  
Vol 67 (9) ◽  
pp. 1161-1164 ◽  
Author(s):  
L. S. Kuzmin ◽  
Yu. V. Nazarov ◽  
D. B. Haviland ◽  
P. Delsing ◽  
T. Claeson
Keyword(s):  
Coulomb Blockade ◽  
Quantum Fluctuations ◽  
Cooper Pairs

NONEQUILIBRIUM CHARACTERISTICS OF INTRINSIC Bi2.3Pb0.1Sr2CaCu2O8+y JOSEPHSON JUNCTIONS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 235-237
Author(s):  
Y. NIE ◽  
Z. H. WANG ◽  
L. QIU ◽  
J. GAO
Keyword(s):  
Single Crystals ◽  
Coulomb Blockade ◽  
Josephson Junctions ◽  
Ion Milling ◽  
Return Current ◽  
Intrinsic Josephson Junctions ◽  
Large Hysteresis

Using photolithography and Ar ion milling, we fabricate small mesas on top of the Bi 2.3 Pb 0.1 Sr 2 CaCu 2 O 8+y single crystals to study the inherent tunnelling property of intrinsic Josephson junctions. The I-V characteristics of the mesas show a typical multiple branches with large hysteresis. The return current I r depends on the N-th branch. The relation of I r and N follows I r= I 0* N m, where -1< m <0 might be related to the Coulomb blockade effect. The McCumber parameter βc of the samples is also investigated.

BOSONIC OPERATOR HAMILTONIAN MODELS OF JOSEPHSON JUNCTIONS IN SERIES AND IN PARALLEL AND THEIR PROJECTIONS ONTO ENTANGLED STATE REPRESENTATIONS

2007 ◽  
Vol 21 (14) ◽  
pp. 851-857 ◽  
Author(s):  
WAN-YU YE ◽  
HONG-YI FAN
Keyword(s):  
Josephson Junctions ◽  
Josephson Current ◽  
Entangled State ◽  
Cooper Pairs ◽  
Hamiltonian Models ◽  
Bosonic Operator ◽  
In Series

We present the bosonic operator Hamiltonian models of two Josephson junctions which are connected in series and in parallel, respectively. By introducing the entangled state representations (|η〉 representation and Cooper pairs representation) and projecting the operator Hamiltonian onto the |η〉 representation we obtain the correct Josephson current and phase equations consistent with the classical Hamiltonian cases.

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