Entanglement concentration of microwave photons based on Kerr effect in circuit QED
arXiv:1602.08919 · doi:10.1103/PhysRevA.95.052314
Abstract
In recent years, superconducting qubits show great potential in quantum computation. Hence, microwave photons become very interesting qubits for quantum information processing assisted by superconducting quantum computation. Here, we present the first protocol for the entanglement concentration on microwave photons, resorting to the cross-Kerr effect in circuit quantum electrodynamics (QED). Two superconducting transmission line resonators (TLRs) coupled to superconducting molecule with the N-type level structure induce the effective cross-Kerr effect for realizing the quantum nondemolition (QND) measurement on microwave photons. With this device, we present a two-qubit polarization parity QND detector on the photon states of the superconducting TLRs, which can be used to concentrate efficiently the nonlocal non-maximally entangled states of microwave photons assisted by several linear microwave elements. This protocol has a high efficiency and it may be useful for solid-state quantum information processing assisted by microwave photons.
9 pages, 5 figures. Comments are welcome to [email protected]
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Cited by in corpus (7)
- Polarization entanglement purification of nonlocal microwave photons based on the cross-Kerr effect in circuit QED
- Phononic entanglement concentration via optomechanical interactions
- Heralded and high-efficient entanglement concentrations based on linear optics assisted by time-delay degree of freedom
- Entanglement concentration and purification of two-mode squeezed microwave photons in circuit QED
- Circuit QED: Cross-Kerr-effect induced by a superconducting qutrit without classical pulses
- Joint estimation of noise and nonlinearity in Kerr systems
- Entanglement concentration protocols for GHZ-type entangled coherent state based on linear optics