Memory effects in quantum information transmission across a Hamiltonian dephasing channel
arXiv:0710.3472 · doi:10.1140/epjst/e2008-00712-1
Abstract
We study a dephasing channel with memory, modelled by a multimode environment of oscillators. Focusing on the case of two channel uses, we show that memory effects can enhance the amount of coherent quantum information transmitted down the channel. We also show the Kraus representation for two channel uses. Finally, we propose a coding-decoding scheme that takes advantage of memory to improve the fidelity of transmission.
12 pages, 5 figures, CEWQO 2007 proceedings
References in corpus (23)
- The capacity of the noisy quantum channel
- Quantum data processing and error correction
- Decoherence in a superconducting quantum bit circuit
- Information transmission through a noisy quantum channel
- Decoherence and 1/f noise in Josephson qubits
- Entanglement enhanced information transmission over a quantum channel with correlated noise
- Quantum Channels with Memory
- On Quantum Fidelities and Channel Capacities
- Dephasing of solid-state qubits at optimal points
- Initial decoherence in solid state qubits
- Experimental demonstration of entanglement-enhanced classical communication over a quantum channel with correlated noise
- Entangled states maximize the two qubit channel capacity for some Pauli channels with memory
- Quantum Capacity of a dephasing channel with memory
- Quantum Capacities of Channels with small Environment
- Spin chains and channels with memory
- Exploiting entanglement in communication channels with correlated noise
- A dynamical model for quantum memory channels
- Experimental Realization of A Two Bit Phase Damping Quantum Code
- Entanglement-enhanced classical capacity of two-qubit quantum channels with memory: the exact solution
- A Lower Bound on the Quantum Capacity of Channels with Correlated Errors
- Efficient Schemes for Reducing Imperfect Collective Decoherences
- Experimental ancilla-assisted qubit transmission against correlated noise using quantum parity checking
- Decoherence due to telegraph and 1/f noise in Josephson qubits