Cooper pair current in the presence of flux noise
arXiv:1110.5503 · doi:10.1103/PhysRevB.85.024527
Abstract
We study the effect of the flux noise on the Cooper pair current and pumping. We generalize the definition of the current in order to take into account the contribution induced by the environment. It turns out that this dissipative current vanishes for charge noise but it is finite in general for noise operators that do not commute with the charge operator. We discuss in a generic framework the effect of flux noise and present a way to engineer it by coupling the system to an additional external circuit. We calculate numerically the pumped charge through the device by solving the master equation for the reduced density matrix of the system and show how it depends on the coupling to the artificial environment.
10 pages, 6 figures
References in corpus (16)
- Charge insensitive qubit design derived from the Cooper pair box
- Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
- Decoherence of flux qubits due to 1/f flux noise
- Observation of Berry's Phase in a Solid State Qubit
- Experimental determination of the Berry phase in a superconducting charge pump
- Measurement scheme of the Berry phase in superconducting circuits
- Nanoampere pumping of Cooper pairs
- Connecting Berry's phase and the pumped charge in a Cooper pair pump
- Decoherence of adiabatically steered quantum systems
- Non-abelian superconducting pumps
- The Cooper Pair Pump as a Quantized Current Source
- Geometric quantum gates with superconducting qubits
- Topological quantization by controlled paths: application to Cooper pairs pumps
- A time dependent Markovian master equation for adiabatic systems and its application to the Cooper pair pumping
- On Conserved Current in Markovian Open Quantum Systems
- Ground-state geometric quantum computing in superconducting systems
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- Quantum effect of inductance on geometric Cooper-pair transport