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- W2949068071 abstract "We present a theoretical analysis of the quantum dynamics of a superconducting circuit based on a highly asymmetric Cooper pair transistor (ACPT) in parallel to a dc-SQUID. Starting from the full Hamiltonian we show that the circuit can be modeled as a charge qubit (ACPT) coupled to an anharmonic oscillator (dc-SQUID). Depending on the anharmonicity of the SQUID, the Hamiltonian can be reduced either to one that describes two coupled qubits or to the Jaynes-Cummings Hamiltonian. Here the dc-SQUID can be viewed as a tunable micron-size resonator. The coupling term, which is a combination of a capacitive and a Josephson coupling between the two qubits, can be tuned from the very strong- to the zero-coupling regimes. It describes very precisely the tunable coupling strength measured in this circuit and explains the 'quantronium' as well as the adiabatic quantum transfer read-out." @default.
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- W2949068071 date "2011-05-17" @default.
- W2949068071 modified "2023-10-18" @default.
- W2949068071 title "Asymmetric Cooper pair transistor in parallel to a dc SQUID: Two coupled quantum systems" @default.
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- W2949068071 doi "https://doi.org/10.1103/physrevb.83.184510" @default.
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