Entangled microwaves as a resource for entangling spatially separate solid-state qubits: superconducting qubits, NV centers and magnetic molecules

Abstract

Quantum correlations present in a broadband two-line squeezed microwave state can induce entanglement in a spatially separated bipartite system consisting of either two single qubits or two qubit ensembles. By using an appropriate master equation for a bipartite quantum system in contact with two separate but entangled baths, the generating entanglement process in spatially separated quantum systems is thoroughly characterized. Our results provide evidence that this entanglement transfer by dissipation is feasible yielding to a steady-state amount of entanglement in the bipartite quantum system which can be optimized for a wide range of realistic physical systems that include state-of-the-art experiments with NV centers in diamond, superconducting qubits or even magnetic molecules embedded in a crystalline matrix.

"15 pages, 10 figures. New section on decoherence effects, references added. Revised version as accepted by Phys. Rev. A"

References in corpus (14)

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Coupling Superconducting Qubits via a Cavity Bus
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Amplification and squeezing of quantum noise with a tunable Josephson metamaterial
• Scalable quantum register based on coupled electron spins in a room temperature solid
• Decoherence of flux qubits due to 1/f flux noise
• Generating Entangled Microwave Radiation Over Two Transmission Lines
• Quantum limited amplification and entanglement in coupled nonlinear resonators
• Path Entanglement of Continuous-Variable Quantum Microwaves
• Entanglement and purity of two-mode Gaussian states in noisy channels
• Nonequilibrium phases in hybrid arrays with flux qubits and NV centers
• Entanglement replication in driven-dissipative many body systems
• Improving the lifetime of the NV center ensemble coupled with a superconducting flux qubit by applying magnetic fields

Cited by in corpus (3)

• Squeezing and quantum state engineering with Josephson traveling wave amplifiers
• Coupling a single NV center with a superconducting qubit via the electro-optic effect
• Cross-entangling electronic and nuclear spins of distant nitrogen-vacancy centers in noisy environments by means of quantum microwave radiation