Effect of decoherence on resonant Cooper-pair tunneling in a voltage-biased single-Cooper-pair transistor
J. Leppäkangas, E. Thuneberg
DOI 10.1103/PhysRevB.78.144518 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We analyze how decoherence appears in the I−V characteristics of a voltage-biased single-Cooper-pair transistor. Especially the effect on resonant single or several Cooper-pair tunneling is studied. We consider both a symmetric and an asymmetric transistor. As a decoherence source we use a small resistive impedance (Re[Z(ω)]⪡RQ=h/4e2) in series with the transistor, which provides both thermal and quantum fluctuations of the voltage. Additional decoherence sources are quasiparticle tunneling across the Josephson junctions and quantum f noise caused by spurious charge fluctuators nearby the island. The analysis is based on a real-time diagrammatic technique which includes Zeno-type effects in the charge transport, where the tunneling is slowed down due to strong decoherence. As compared to the Pauli-master-equation treatment of the problem, the present results are more consistent with experiments where many of the predicted sharp resonant structures are missing or weakened due to decoherence.
Similar papers
Effect of decoherence on resonant Cooper-pair tunneling in a voltage-biased single-Cooper-pair transistor
similarity 0.90J. Leppäkangas & E. Thuneberg · 2008 · arXiv:0806.4512
Source status unknown — claims are unverified
Tunneling of Cooper pairs across voltage-biased asymmetric single-Cooper-pair transistors
similarity 0.90J. Leppäkangas et al.
Source status unknown — claims are unverified
Coulomb blockade of Cooper pair tunneling and parity effects in the Cooper pair transistor
similarity 0.90S. Corlevi et al.
Source status unknown — claims are unverified
Resonant microwave properties of a voltage-biased single-Cooper-pair transistor
similarity 0.89L. Y. Gorelik et al.
Source status unknown — claims are unverified
ac Josephson Effect and Resonant Cooper Pair Tunneling Emission of a Single Cooper Pair Transistor
similarity 0.89P.-M. Billangeon et al.
Source status unknown — claims are unverified
Tunneling of Cooper pairs across voltage biased asymmetric single-Cooper-pair transistors
similarity 0.88J. Leppäkangas et al. · 2006 · arXiv:cond-mat/0604092
Source status unknown — claims are unverified