Pittman, T.B.Franson, J.D.2020-08-032020-08-032002-12-05T. B. Pittman and J. D. Franson, Cyclical quantum memory for photonic qubits, Phys. Rev. A 66, 062302, doi: https://doi.org/10.1103/PhysRevA.66.062302https://doi.org/10.1103/PhysRevA.66.062302http://hdl.handle.net/11603/19302We have performed a proof-of-principle experiment in which qubits encoded in the polarization states of single photons from a parametric down-conversion source were coherently stored and read out from a quantum memory device. The memory device utilized a simple free-space storage loop, providing a cyclical readout that could be synchronized with the cycle time of a quantum computer. The coherence of the photonic qubits was maintained during switching operations by using a high-speed polarizing Sagnac interferometer switch.4 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.©2002 The American Physical SocietyText