



@article {1166,
	title = {Photon storage in Lambda-type optically dense atomic media. I. Cavity  model
},
	journal = {Physical Review A},
	volume = {76},
	year = {2007},
	month = {2007/9/7},
	abstract = {  In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)], we
used a universal physical picture to optimize and demonstrate equivalence
between a wide range of techniques for storage and retrieval of photon wave
packets in Lambda-type atomic media in free space, including the adiabatic
reduction of the photon group velocity, pulse-propagation control via
off-resonant Raman techniques, and photon-echo-based techniques. In the present
paper, we perform the same analysis for the cavity model. In particular, we
show that the retrieval efficiency is equal to C/(1+C) independent of the
retrieval technique, where C is the cooperativity parameter. We also derive the
optimal strategy for storage and, in particular, demonstrate that at any
detuning one can store, with the optimal efficiency of C/(1+C), any smooth
input mode satisfying T C gamma >> 1 and a certain class of resonant input
modes satisfying T C gamma ~ 1, where T is the duration of the input mode and 2
gamma is the transition linewidth. In the two subsequent papers of the series,
we present the full analysis of the free-space model and discuss the effects of
inhomogeneous broadening on photon storage.
},
	doi = {10.1103/PhysRevA.76.033804},
	url = {http://arxiv.org/abs/quant-ph/0612082v2},
	author = {Alexey V. Gorshkov and Axel Andre and Mikhail D. Lukin and Anders S. Sorensen}
}
@article {1167,
	title = {Photon storage in Lambda-type optically dense atomic media. II.  Free-space model
},
	journal = {Physical Review A},
	volume = {76},
	year = {2007},
	month = {2007/9/7},
	abstract = {  In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)], we
presented a universal physical picture for describing a wide range of
techniques for storage and retrieval of photon wave packets in Lambda-type
atomic media in free space, including the adiabatic reduction of the photon
group velocity, pulse-propagation control via off-resonant Raman techniques,
and photon-echo based techniques. This universal picture produced an optimal
control strategy for photon storage and retrieval applicable to all approaches
and yielded identical maximum efficiencies for all of them. In the present
paper, we present the full details of this analysis as well some of its
extensions, including the discussion of the effects of non-degeneracy of the
two lower levels of the Lambda system. The analysis in the present paper is
based on the intuition obtained from the study of photon storage in the cavity
model in the preceding paper [Gorshkov et al., Phys. Rev. A 76, 033804 (2007)].
},
	doi = {10.1103/PhysRevA.76.033805},
	url = {http://arxiv.org/abs/quant-ph/0612083v2},
	author = {Alexey V. Gorshkov and Axel Andre and Mikhail D. Lukin and Anders S. Sorensen}
}
@article {1168,
	title = {Photon storage in Lambda-type optically dense atomic media. III. Effects  of inhomogeneous broadening
},
	journal = {Physical Review A},
	volume = {76},
	year = {2007},
	month = {2007/9/7},
	abstract = {  In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)] and
in the two preceding papers [Gorshkov et al., Phys. Rev. A 76, 033804 (2007);
76, 033805 (2007)], we used a universal physical picture to optimize and
demonstrate equivalence between a wide range of techniques for storage and
retrieval of photon wave packets in homogeneously broadened Lambda-type atomic
media, including the adiabatic reduction of the photon group velocity,
pulse-propagation control via off-resonant Raman techniques, and
photon-echo-based techniques. In the present paper, we generalize this
treatment to include inhomogeneous broadening. In particular, we consider the
case of Doppler-broadened atoms and assume that there is a negligible
difference between the Doppler shifts of the two optical transitions. In this
situation, we show that, at high enough optical depth, all atoms contribute
coherently to the storage process as if the medium were homogeneously
broadened. We also discuss the effects of inhomogeneous broadening in solid
state samples. In this context, we discuss the advantages and limitations of
reversing the inhomogeneous broadening during the storage time, as well as
suggest a way for achieving high efficiencies with a nonreversible
inhomogeneous profile.
},
	doi = {10.1103/PhysRevA.76.033806},
	url = {http://arxiv.org/abs/quant-ph/0612084v2},
	author = {Alexey V. Gorshkov and Axel Andre and Mikhail D. Lukin and Anders S. Sorensen}
}
@article {1180,
	title = {Universal Approach to Optimal Photon Storage in Atomic Media},
	journal = {Physical Review Letters},
	volume = {98},
	year = {2007},
	month = {2007/3/19},
	abstract = {  We present a universal physical picture for describing storage and retrieval
of photon wave packets in a Lambda-type atomic medium. This physical picture
encompasses a variety of different approaches to pulse storage ranging from
adiabatic reduction of the photon group velocity and pulse-propagation control
via off-resonant Raman fields to photon-echo based techniques. Furthermore, we
derive an optimal control strategy for storage and retrieval of a photon wave
packet of any given shape. All these approaches, when optimized, yield
identical maximum efficiencies, which only depend on the optical depth of the
medium.
},
	doi = {10.1103/PhysRevLett.98.123601},
	url = {http://arxiv.org/abs/quant-ph/0604037v3},
	author = {Alexey V. Gorshkov and Axel Andre and Michael Fleischhauer and Anders S. Sorensen and Mikhail D. Lukin}
}
