Controlled transfer of quantum amplitude via modulation of a potential barrier: numerical study in a model of SQUID

Details Controlled transfer of quantum amplitude via modulation of a potential barrier: numerical study in a model of SQUID Controlled transfer of quantum amplitude via modulation of a potential barrier: numerical study in a model of SQUID

2001-05-09

arxiv.org/abs/quant-ph/0105038v1

Physics

Quantum Physics

4 pages, revtex, 4 figures

Scientific paper

10.1088/0953-2048/15/1/302

We numerically integrate the time-dependent Schrodinger equation in a single-degree-of-freedom model of SQUID with a variable potential barrier between the basis flux states. We find that linear superpositions of the basis states, with relatively little residual excitation, can be formed by pulsed modulations of the barrier, provided the pulse duration exceeds the period of small oscillations of the flux. Two pulses applied in sequence exhibit strong interference effects, which we propose to use for an experimental determination of the decoherence time in SQUIDs.

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