Phase Locking between Two All-Optical Quantum Memories

• URL: http://arxiv.org/abs/2009.06811v1
• Date: Tue, 15 Sep 2020 01:26:25 GMT
• Title: Phase Locking between Two All-Optical Quantum Memories
• Authors: Fumiya Okamoto, Mamoru Endo, Mikihisa Matsuyama, Yuya Ishizuka, Yang Liu, Rei Sakakibara, Yosuke Hashimoto, Jun-ichi Yoshikawa, Peter van Loock, Akira Furusawa
• Abstract summary: A time-controlled release of two-mode entangled single-photon states is demonstrated. Entanglement and nonclassicality are preserved for release-time differences up to 400 ns.
• Score: 3.342804345921005
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Optical approaches to quantum computation require the creation of multi-mode photonic quantum states in a controlled fashion. Here we experimentally demonstrate phase locking of two all-optical quantum memories, based on a concatenated cavity system with phase reference beams, for the time-controlled release of two-mode entangled single-photon states. The release time for each mode can be independently determined. The generated states are characterized by two-mode optical homodyne tomography. Entanglement and nonclassicality are preserved for release-time differences up to 400 ns, confirmed by logarithmic negativities and Wigner-function negativities, respectively.

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