Quantum nonlinear optics using optical memory

M. Hosseini, S. Rebic, B. M. Sparkes, J. Twamley, B. C. Buchler, P. K. Lam

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


Large nonlinearity at the single-photon level can pave the way for the implementation of universal quantum gates. However, realizing large and noiseless nonlinearity at such low light levels has been a great challenge for scientists in the past decade. We present a proposal for using quantum memory to enhance the cross-phase modulation (XPM) of two optical fields. Our memory, which is based on the gradient echo memory (GEM) scheme, maps the optical fields into Fourier transformed polaritonic excitations in an atomic ensemble. We show that nonlinear interactions can be induced in GEM. Due to the slowing down and subsequent storage of light fields within a memory, nonlinear interaction time between the fields can be extended resulting in an enhancement of the effective nonlinearity. We present results showing noiseless cross-phase modulations and discuss plans to further increase the cross-phase modulation strength to a level useful for implementing quantum gates.

Original languageEnglish
Title of host publicationNonlinear Optics, NLO 2013
Place of PublicationWashington, DC
PublisherOptical Society of America (OSA)
Number of pages2
ISBN (Print)9781557529770
Publication statusPublished - 2013
EventNonlinear Optics, NLO 2013 - Kohala Coast, HI, United States
Duration: 21 Jul 201326 Jul 2013


OtherNonlinear Optics, NLO 2013
Country/TerritoryUnited States
CityKohala Coast, HI


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