We show that a high degree of steady-state entanglement between two spatially separated and initially uncoupled qubits can be achieved via interaction with a quantized squeezed field in a cavity. The cavity field induces two-photon coherence, which is crucial in creating entanglement between the qubits. Optimum entanglement is obtained when the less dissipative qubit is incoherently pumped while the other dissipates the excitation. Given the current state-of-the-art in cavity quantum electrodynamics and squeezed light sources, our scheme presents an effective way for light-to-matter entanglement transfer.
© 2012 Optical Society of America
Original Manuscript: November 29, 2011
Revised Manuscript: March 19, 2012
Manuscript Accepted: March 30, 2012
Published: May 14, 2012
Eyob A. Sete and Sumanta Das, "Entanglement of two spatially separated qubits via correlated photons," Opt. Lett. 37, 1733-1735 (2012)