Geometric Landau-Zener interferometry in a superconducting charge pump
arXiv:1106.3941 · doi:10.1103/PhysRevLett.107.207002
Abstract
We propose a new type of interferometry, based on geometric phases accumulated by a periodically driven two-level system undergoing multiple Landau-Zener transitions. As a specific example, we study its implementation in a superconducting charge pump. We find that interference patterns appear as a function of the pumping frequency and the phase bias, and clearly manifest themselves in the pumped charge. We also show that the effects described should persist in the presence of realistic decoherence.
5 pages, 3 figures
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- Nonadiabatic Dynamics of a Dissipative Two-level System
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- Photon-assisted Landau-Zener transition: Role of coherent superposition states
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- Single Cooper-pair pumping in the adiabatic limit and beyond
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- Hamiltonian formulation of nonequilibrium quantum dynamics: geometric structure of the BBGKY hierarchy
- Dynamics of a two-state system through a real level crossing
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- Simulating dynamical quantum Hall effect with superconducting qubits
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- Coherent Cooper-pair pumping by magnetic flux control
- Demonstration of geometric diabatic control of quantum states
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