%0 Journal Article %D 2020 %T Optical quantum memory with optically inaccessible noble-gas spins %A Or Katz %A Eran Reches %A Roy Shaham %A Alexey V. Gorshkov %A Ofer Firstenberg %X
Optical quantum memories, which store and preserve the quantum state of photons, rely on a coherent mapping of the photonic state onto matter states that are optically accessible. Here we outline a new physical mechanism to map the state of photons onto the long-lived but optically inaccessible collective state of noble-gas spins. The mapping employs the coherent spin-exchange interaction arising from random collisions with alkali vapor. We analyze optimal strategies for high-efficiency storage and retrieval of non-classical light at various parameter regimes. Based on these strategies, we identify feasible experimental conditions for realizing efficient quantum memories with noble-gas spins having hours-long coherence times at room temperature and above
%8 7/17/2020 %G eng %U https://arxiv.org/abs/2007.08770 %0 Journal Article %J Physical Review A %D 2015 %T Fractional Quantum Hall States of Rydberg Polaritons %A Mohammad F. Maghrebi %A Norman Y. Yao %A Mohammad Hafezi %A Thomas Pohl %A Ofer Firstenberg %A Alexey V. Gorshkov %X We propose a scheme for realizing fractional quantum Hall states of light. In our scheme, photons of two polarizations are coupled to different atomic Rydberg states to form two flavors of Rydberg polaritons that behave as an effective spin. An array of optical cavity modes overlapping with the atomic cloud enables the realization of an effective spin-1/2 lattice. We show that the dipolar interaction between such polaritons, inherited from the Rydberg states, can be exploited to create a flat, topological band for a single spin-flip excitation. At half filling, this gives rise to a photonic (or polaritonic) fractional Chern insulator -- a lattice-based, fractional quantum Hall state of light. %B Physical Review A %V 91 %P 033838 %8 2015/03/31 %G eng %U http://arxiv.org/abs/1411.6624v1 %N 3 %! Phys. Rev. A %R 10.1103/PhysRevA.91.033838 %0 Journal Article %J Nature (London) %D 2013 %T Attractive Photons in a Quantum Nonlinear Medium %A Ofer Firstenberg %A Thibault Peyronel %A Qi-Yu Liang %A Alexey V. Gorshkov %A Mikhail D. Lukin %A Vladan Vuletic %B Nature (London) %V 502 %P 71 %G eng %U http://dx.doi.org/10.1038/nature12512