We show that optical memories arranged along an optical path can perform arbitrary unitary transformations on frequency domain optical states. The protocol offers favourable scaling and can be used with any quantum memory that uses an off-resonant Raman transition to reversibly transfer optical information to an atomic spin coherence.
Arbitrary unitary transformations on optical states using a quantum memory
Geoff T. Campbell, Olivier Pinel, Mahdi Hosseini, Ben C. Buchler, Ping Koy Lam; Arbitrary unitary transformations on optical states using a quantum memory. AIP Conf. Proc. 4 December 2014; 1633 (1): 210–212. https://doi.org/10.1063/1.4903139
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