Active suppression of dephasing in Josephson-junction qubits
arXiv:cond-mat/0212127 · doi:10.1134/1.1644314
Abstract
Simple majority code correcting dephasing errors by encoding a qubit of information into physical qubits is studied quantitatively. We derive an equation for quasicontinuous evolution of the density matrix of encoded quantum information under the error correction procedure in the presence of dephasing noise that in general can be correlated at different qubits. Specific design of the Josephson-junction circuit implementing this scheme is suggested.
4 pages, 1 figure
References in corpus (15)
- Quantum state engineering with Josephson-junction devices
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- Dynamical Decoupling of Open Quantum Systems
- Manipulating the Quantum State of an Electrical Circuit
- Noiseless Quantum Codes
- Coherent Quantum Dynamics of a Superconducting Flux Qubit
- Quantum Computers and Dissipation
- Quantum oscillations in two coupled charge qubits
- Maintaining coherence in Quantum Computers
- Decoherence and 1/f noise in Josephson qubits
- Decoherence of quantum registers
- Creating Decoherence-Free Subspaces with Strong and Fast Pulses
- Aharonov-Casher-Effect Suppression of Macroscopic Tunneling of Magnetic Flux
- Quantum computing and quantum measurement with mesoscopic Josephson junctions
- Quantum nondemolition measurements of a qubit
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