Quantum nonlinear optics with single photons enabled by strongly interacting atoms
Thibault Peyronel,Ofer Firstenberg,Ofer Firstenberg,Qiyu Liang,Sebastian Hofferberth,Alexey V. Gorshkov,Thomas Pohl,Mikhail D. Lukin,Vladan Vuletic +8 more
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TLDR
This work demonstrates a medium that is nonlinear at the level of individual quanta, exhibiting strong absorption of photon pairs while remaining transparent to single photons, paving the way for quantum-by-quantum control of light fields, including single-photon switching, all-optical deterministic quantum logic and the realization of strongly correlated many-body states of light.Abstract:
The realization of strong nonlinear interactions between individual light quanta (photons) is a long-standing goal in optical science and engineering being of both fundamental and technological significance. In conventional optical materials, the nonlinearity at light powers corresponding to single photons is negligibly weak. Here we demonstrate a medium that is nonlinear at the level of individual quanta, exhibiting strong absorption of photon pairs while remaining transparent to single photons. The quantum nonlinearity is obtained by coherently coupling slowly propagating photons to strongly interacting atomic Rydberg states in a cold, dense atomic gas. Our approach paves the way for quantum-by-quantum control of light fields, including single-photon switching, all-optical deterministic quantum logic and the realization of strongly correlated many-body states of light.read more
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Topological Photonics
Tomoki Ozawa,Hannah M. Price,Alberto Amo,Nathan Goldman,Mohammad Hafezi,Ling Lu,Mikael C. Rechtsman,David Schuster,Jonathan Simon,Oded Zilberberg,Iacopo Carusotto +10 more
TL;DR: Topological photonics is a rapidly emerging field of research in which geometrical and topological ideas are exploited to design and control the behavior of light as mentioned in this paper, which holds great promise for applications.
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Iacopo Carusotto,Cristiano Ciuti +1 more
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Cavity-based quantum networks with single atoms and optical photons
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Quantum trajectories and open many-body quantum systems
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References
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Electromagnetically induced transparency : Optics in coherent media
TL;DR: In this paper, the authors consider the atomic dynamics and the optical response of the medium to a continuous-wave laser and show how coherently prepared media can be used to improve frequency conversion in nonlinear optical mixing experiments.
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Light speed reduction to 17 metres per second in an ultracold atomic gas
Lene Vestergaard Hau,Lene Vestergaard Hau,Stephen E. Harris,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Cyrus H. Behroozi +6 more
TL;DR: In this paper, an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than the speed of light in a vacuum, is presented.
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Quantum information with Rydberg atoms
TL;DR: Rydberg atoms with principal quantum number $n⪢1$ have exaggerated atomic properties including dipole-dipole interactions that scale as ${n}^{4}$ and radiative lifetimes that scale at least{n}−3}$ as mentioned in this paper, and it was proposed a decade ago to implement quantum gates between neutral atom qubits.
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Dark-State Polaritons in Electromagnetically Induced Transparency
TL;DR: This work identifies form-stable coupled excitations of light and matter ("dark-state polaritons") associated with the propagation of quantum fields in electromagnetically induced transparency that can be controlled by an external coherent field as the pulse propagates.
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Dipole blockade and quantum information processing in mesoscopic atomic ensembles.
Mikhail D. Lukin,Michael Fleischhauer,Robin Côté,Luming Duan,Dieter Jaksch,J. I. Cirac,Peter Zoller +6 more
TL;DR: A technique for manipulating quantum information stored in collective states of mesoscopic ensembles by optical excitation into states with strong dipole-dipole interactions that can be employed for controlled generation of collective atomic spin states as well as nonclassical photonic states and for scalable quantum logic gates is described.