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- Title
Quantum Zeno Effect in Cooper-Pair Transport through a Double-Island Josephson System.
- Authors
Shnirman, A.; Makhlin, Yu
- Abstract
Motivated by recent experiments, we analyze transport of Cooper pairs through a double-island Josephson qubit. At low bias in a certain range of gate voltages, coherent superpositions of charge states play a crucial role. Analysis of the evolution of the density matrix allows us to cover a wide range of parameters, including situations with degenerate levels, when dissipation strongly affects the coherent eigenstates. At high noise levels, the so-called Zeno effect can be observed, which slows down the transport. Our analysis explains certain features of the I–V curves, in particular, the visibility and shape of resonant peaks and lines. © 2003 MAIK “Nauka / Interperiodica”.
- Subjects
JOSEPHSON effect; SUPERPOSITION principle (Physics); ENERGY dissipation; EIGENVALUES
- Publication
JETP Letters, 2003, Vol 78, Issue 7, p447
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1633315