Electromagnetically induced transparency of ultra-long-range Rydberg molecules

Mirgorodskiy, Ivan; Christaller, Florian; Braun, Christoph; Paris-Mandoki, Asaf; Tresp, Christoph; Hofferberth, Sebastian

doi:10.1103/physreva.96.011402

Cited by 18 publications

(16 citation statements)

References 54 publications

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“…Therefore, understanding its interplay with coherent driving of internal impurity states is also important for the quality of light matter interfaces involving polaron physics. Examples include the storage [51] and propagation [52] of quantum light in strongly interacting nonlinear media [53] or atomic BECs coupled to an optical cavity [54].…”

Section: Resultsmentioning

confidence: 99%

Critical slowdown of non-equilibrium polaron dynamics

et al. 2019

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We study the quantum dynamics of a single impurity following its sudden immersion into a Bose-Einstein condensate. The ensuing formation of the Bose polaron in this general setting can be seen as impurity decoherence driven by the condensate, which we describe within a master equation approach. We derive rigorous analytical results for this decoherence dynamics, and thereby reveal distinct stages of its evolution from a universal stretched exponential initial relaxation to the final approach to equilibrium. The associated polaron formation time exhibits a strong dependence on the impurity speed and is found to undergo a critical slowdown around the speed of sound of the condensate. This rich non-equilibrium behavior of quantum impurities is of direct relevance to recent cold atom experiments, in which Bose polarons are created by a sudden quench of the impurity-bath interaction.

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Section: Resultsmentioning

confidence: 99%

Critical slowdown of non-equilibrium polaron dynamics

et al. 2019

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“…in Refs. [13,14,22] without much justification. A particularly simple example is obtained if additionally the |ψ r,n,i (0) for all n are eigenstates of the darktime Hamiltonian H r,i with eigenvalues E r,n,i .…”

Section: B Eit-based Storage and Retrievalmentioning

confidence: 99%

“…The quantities |ψ g,n,i (t) , |ψ r,n,i (t) , T † i , R n,i (t), and C(t) are still defined by Eqs. (7), (8), (14), (18), and (25). But now the operator T † i is no longer unitary and the single-particle state T † i |ψ g,n,i (t) which appears in the definition (18) of R n,i (t) is no longer properly normalized.…”

Section: E Beyond a Plane-wave Signal Light Fieldmentioning

confidence: 99%

“…The dark time between storage and retrieval was chosen to be 5 µs. This choice was made because except for really low density, the retrieval efficiency oscillates as a function of dark time because of atom-atom interactions [13,14]. For the 70S state the first revival of the efficiency occurs for t = 5 µs.…”

Section: Density Dependence Of the Visibilitymentioning

confidence: 99%

“…Aiming at the creation of strong interactions between photons, EIT has been combined with Rydberg states [8][9][10]. Coherence in Rydberg EIT suffers from the fact that the sensitivity of a Rydberg atom to interactions with surrounding ground-state atoms increases with atomic density and with increasing principal quantum number [11][12][13][14]. In addition, when the atoms are held in a reddetuned optical dipole trap, the differential light shifts between the ground and Rydberg state are large.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dark-time decay of the retrieval efficiency of light stored as a Rydberg excitation in a noninteracting ultracold gas

et al. 2020

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We study the dark-time decay of the retrieval efficiency for light stored in a Rydberg state in an ultracold gas of 87 Rb atoms based on electromagnetically induced transparency. Using low atomic density to avoid dephasing caused by atom-atom interactions, we measure a 1/e time of 30 µs for the 80S state in free expansion. One of the dominant limitations is the combination of photon recoil and thermal atomic motion at 0.2 µK. If the 1064-nm dipole trap is left on, then the 1/e time is reduced to 13 µs, in agreement with a model taking differential light shifts and gravitational sag into account. To characterize how coherent the retrieved light is, we overlap it with reference light and measure the visibility V of the resulting interference pattern, obtaining V > 90% for short dark time. We develop a model which maps the retrieval efficiency to single-atom properties and we show that the retrieval efficiency is related to the decay of fringe visibility in Ramsey spectroscopy and to the spatial first-order correlation function of the gas.

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Ultracold Rydberg molecules

2018

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Ultracold molecules formed from association of a single Rydberg atom with surrounding atoms or molecules and those from double Rydberg excitations are discussed in this review. Ultralong-range Rydberg molecules possess a novel molecular bond resulting from scattering of the Rydberg electron from the perturber atoms or molecules. The strong interactions between Rydberg atoms in ultracold gases may lead to formation of macroscopic Rydberg macrodimers. The exquisite control over the properties of the Rydberg electron means that interesting and unusual few-body and quantum many-body features can be realized in such systems.

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Electromagnetically induced transparency of ultra-long-range Rydberg molecules

Cited by 18 publications

References 54 publications

Critical slowdown of non-equilibrium polaron dynamics

Critical slowdown of non-equilibrium polaron dynamics

Dark-time decay of the retrieval efficiency of light stored as a Rydberg excitation in a noninteracting ultracold gas

Ultracold Rydberg molecules

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