Measurement-induced two-qubit entanglement in a bad cavity: Fundamental and practical considerations
arXiv:1202.4854 · doi:10.1103/PhysRevA.85.032327
Abstract
An entanglement-generating protocol is described for two qubits coupled to a cavity field in the bad-cavity limit. By measuring the amplitude of a field transmitted through the cavity, an entangled spin-singlet state can be established probabilistically. Both fundamental limitations and practical measurement schemes are discussed, and the influence of dissipative processes and inhomogeneities in the qubits are analyzed. The measurement-based protocol provides criteria for selecting states with an infidelity scaling linearly with the qubit-decoherence rate.
13 pages, 7 figures, submitted to Phys. Rev. A