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In-situ entanglement generation based on rare-earth quantum memory coupled to a nonlinear cavity (Part II: theoretical analysis)

Hoi-Kwan Lau, Hong Qiao, Aashish A. Clerk +1 more

Bulletin of the American Physical SocietyMar 15, 20210 citations

Mapping photonic entanglement into and out of a quantum memory

Kyung Soo Choi, Hui Deng, Julien Laurat +1 more

arXiv:0712.3571NatureMar 1, 2008530 citations

Efficient In Situ Generation of Photon-Memory Entanglement in a Nonlinear Cavity

Hoi-Kwan Lau, Hong Wei Qiao, Aashish A. Clerk +1 more

Parametrically driving an optical cavity that simultaneously couples to an atomic ensemble quantum memory enables in situ generation of multimode photon-memory entanglement. A high-rate bipartite photon-memory entanglement can be generated even after discarding one entangled optical mode. This protocol can be realized with existing technologies based on photonic resonators integrated with a rare-earth-ion doped quantum memory. The proposed scheme shows significant advantages in entanglement generation rates compared with prevailing quantum memory protocols and experiments, with theoretical ebit rates of tens of MHz without fine-tuned operating conditions. Such a photon-memory entanglement source offers a versatile resource for quantum networking and interconnect applications.Parametrically driving an optical cavity that simultaneously couples to an atomic ensemble quantum memory enables in situ generation of multimode photon-memory entanglement. A high-rate bipartite photon-memory entanglement can be generated even after discarding one entangled optical mode. This protocol can be realized with existing technologies based on photonic resonators integrated with a rare-earth-ion doped quantum memory. The proposed scheme shows significant advantages in entanglement generation rates compared with prevailing quantum memory protocols and experiments, with theoretical ebit rates of tens of MHz without fine-tuned operating conditions. Such a photon-memory entanglement source offers a versatile resource for quantum networking and interconnect applications.

arXiv:2208.00886Physical Review LettersFeb 4, 20257 citations

In-situ Generation of Photon-Memory Entanglement Using an Integrated Rare-Earth Photonic Quantum Memory

Alexander Kolar, Ian Chin, Conner Fong +7 more

We develop an integrated SiC/Rare-earth photonic platform enabling in-situ photon-memory entanglement within an absorptive rare-earth quantum memory. Entanglement generation rate up to 10 Mebits/s and heralding efficiency >70% are expected.

Jan 1, 20250 citations

Atomic and Photonic Entanglement Generation in n Coupled Atom-Cavity Systems

Rahime Sufiani, Ahad Darkhosh

International Journal of Theoretical PhysicsDec 26, 20140 citations

Proposal for a coherent quantum memory for propagating microwave photons

M Afzelius, Nicolas Sangouard, G Johansson +2 more

We describe a multi-mode quantum memory for propagating microwave photons that combines a solid-state spin ensemble resonantly coupled to a frequency tunable single-mode microwave cavity. We first show that high efficiency mapping of the quantum state transported by a free photon to the spin ensemble is possible both for strong and weak coupling between the cavity mode and the spin ensemble. We also show that even in the weak coupling limit unit efficiency and faithful retrieval can be obtained through time reversal inhomogeneous dephasing based on spin echo techniques. This is possible provided that the cavity containing the spin ensemble and the transmission line are impedance matched. We finally discuss the prospects for an experimental implementation using a rare-earth doped crystal coupled to a superconducting resonator.We describe a multi-mode quantum memory for propagating microwave photons that combines a solid-state spin ensemble resonantly coupled to a frequency tunable single-mode microwave cavity. We first show that high efficiency mapping of the quantum state transported by a free photon to the spin ensemble is possible both for strong and weak coupling between the cavity mode and the spin ensemble. We also show that even in the weak coupling limit unit efficiency and faithful retrieval can be obtained through time reversal inhomogeneous dephasing based on spin echo techniques. This is possible provided that the cavity containing the spin ensemble and the transmission line are impedance matched. We finally discuss the prospects for an experimental implementation using a rare-earth doped crystal coupled to a superconducting resonator.

arXiv:1301.1858New Journal of PhysicsJun 17, 201355 citations

In-situ entanglement generation based on rare-earth quantum memory coupled to a nonlinear cavity (Part I: experimental proposal)

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In-situ entanglement generation based on rare-earth quantum memory coupled to a nonlinear cavity (Part I: experimental proposal)

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