Fidelity of Fock-state-encoded qubits subjected to continuous variable Gaussian processes
arXiv:1312.3655 · doi:10.1103/PhysRevA.89.012333
Abstract
When a harmonic oscillator is under the influence of a Gaussian process such as linear damping, parametric gain, and linear coupling to a thermal environment, its coherent states are transformed into states with Gaussian Wigner function. Qubit states can be encoded in the |0> and |1> Fock states of a quantum harmonic oscillator, and it is relevant to know the fidelity of the output qubit state after a Gaussian process on the oscillator. In this paper we present a general expression for the average qubit fidelity in terms of the first and second moments of the output from input coherent states subjected to Gaussian processes.
8 pages, 4 figures, submitted to Phys. Rev. A
References in corpus (11)
- Strong dispersive coupling of a high finesse cavity to a micromechanical membrane
- Quantum teleportation between light and matter
- Experimental demonstration of quantum memory for light
- A Single-Atom Quantum Memory
- Quantum memory for squeezed light
- Reversible state transfer between light and a single trapped atom
- Quantum computing with an electron spin ensemble
- Complete Characterization of Quantum-Optical Processes
- Reversible state transfer between superconducting qubits and atomic ensembles
- Quantum storage of polarization qubits in birefringent and anisotropically absorbing materials
- Fundamental limitations in spin-ensemble quantum memories for cavity fields