



@article {2060,
	title = {Observation of three-photon bound states in a quantum nonlinear medium},
	journal = {Science},
	volume = {359},
	year = {2018},
	month = {2018/02/16},
	pages = {783-786},
	abstract = {<p><span style="font-family: \&quot;Lucida Grande\&quot;, helvetica, arial, verdana, sans-serif; font-size: 14.4px;">Bound states of massive particles, such as nuclei, atoms or molecules, are ubiquitous in nature and constitute the bulk of the visible world around us. In contrast, photons typically only weakly influence each other due to their very weak interactions and vanishing mass. We report the observation of traveling three-photon bound states in a quantum nonlinear medium where the interactions between photons are mediated by atomic Rydberg states. In particular, photon correlation and conditional phase measurements reveal the distinct features associated with three-photon and two-photon bound states. Such photonic trimers and dimers can be viewed as quantum solitons with shape-preserving wavefunctions that depend on the constituent photon number. The observed bunching and strongly nonlinear optical phase are quantitatively described by an effective field theory (EFT) of Rydberg-induced photon-photon interactions, which demonstrates the presence of a substantial effective three-body force between the photons. These observations pave the way towards the realization, studies, and control of strongly interacting quantum many-body states of light.</span></p>},
	doi = {10.1126/science.aao7293},
	url = {http://science.sciencemag.org/content/359/6377/783},
	author = {Qi-Yu Liang and Aditya V. Venkatramani and Sergio H. Cantu and Travis L. Nicholson and Michael Gullans and Alexey V. Gorshkov and Jeff D. Thompson and Cheng Chin and Mikhail D. Lukin and Vladan Vuletic}
}
@article {1505,
	title = {All-Optical Switch and Transistor Gated by One Stored Photon},
	journal = {Science},
	volume = {341},
	year = {2013},
	month = {2013/07/04},
	pages = {768 - 770},
	abstract = {  The realization of an all-optical transistor where one {\textquoteright}gate{\textquoteright} photon controls
a {\textquoteright}source{\textquoteright} light beam, is a long-standing goal in optics. By stopping a light
pulse in an atomic ensemble contained inside an optical resonator, we realize a
device in which one stored gate photon controls the resonator transmission of
subsequently applied source photons. A weak gate pulse induces bimodal
transmission distribution, corresponding to zero and one gate photons. One
stored gate photon produces fivefold source attenuation, and can be retrieved
from the atomic ensemble after switching more than one source photon. Without
retrieval, one stored gate photon can switch several hundred source photons.
With improved storage and retrieval efficiency, our work may enable various new
applications, including photonic quantum gates, and deterministic multiphoton
entanglement.
},
	doi = {10.1126/science.1238169},
	url = {http://arxiv.org/abs/1401.3194v1},
	author = {Wenlan Chen and Kristin M. Beck and Robert B{\"u}cker and Michael Gullans and Mikhail D. Lukin and Haruka Tanji-Suzuki and Vladan Vuletic}
}
@article {1841,
	title = {Attractive Photons in a Quantum Nonlinear Medium},
	journal = {Nature (London)},
	volume = {502},
	year = {2013},
	pages = {71},
	url = {http://dx.doi.org/10.1038/nature12512},
	author = {Ofer Firstenberg and Thibault Peyronel and Qi-Yu Liang and Alexey V. Gorshkov and Mikhail D. Lukin and Vladan Vuletic}
}
@article {1182,
	title = {Fast Entanglement Distribution with Atomic Ensembles and Fluorescent  Detection
},
	journal = {Physical Review A},
	volume = {81},
	year = {2010},
	month = {2010/2/12},
	abstract = {  Quantum repeaters based on atomic ensemble quantum memories are promising
candidates for achieving scalable distribution of entanglement over long
distances. Recently, important experimental progress has been made towards
their implementation. However, the entanglement rates and scalability of
current approaches are limited by relatively low retrieval and single-photon
detector efficiencies. We propose a scheme, which makes use of fluorescent
detection of stored excitations to significantly increase the efficiency of
connection and hence the rate. Practical performance and possible experimental
realizations of the new protocol are discussed.
},
	doi = {10.1103/PhysRevA.81.020303},
	url = {http://arxiv.org/abs/0907.3839v2},
	author = {Jonatan B. Brask and Liang Jiang and Alexey V. Gorshkov and Vladan Vuletic and Anders S. Sorensen and Mikhail D. Lukin}
}
@article {1296,
	title = {Ultracold Cs$_2$ Feshbach Spectroscopy},
	year = {2003},
	month = {2003/12/23},
	abstract = {  We have observed and located more than 60 magnetic field-induced Feshbach
resonances in ultracold collisions of ground-state $^{133}$Cs atoms. These
resonances are associated with molecular states with up to four units of
rotational angular momentum, and are detected through variations in the
elastic, inelastic, and radiative collision cross sections. These observations
allow us to greatly improve upon the interaction potentials between two cesium
atoms and to reproduce the positions of most resonances to accuracies better
than 0.5\%. Based on the relevant coupling scheme between the electron spin,
nuclear spin, and orbital angular momenta of the nuclei, quantum numbers and
energy structure of the molecular states beneath the dissociation continuum are
revealed. Finally, we predict the relevant collision properties for cesium
Bose-Einstein condensation experiments.
},
	url = {http://arxiv.org/abs/cond-mat/0312613v2},
	author = {Cheng Chin and Vladan Vuletic and Andrew J. Kerman and Steven Chu and Eite Tiesinga and Paul J. Leo and Carl J. Williams}
}
