Two-color optical nonlinearity in an ultracold Rydberg atom gas mixture

Chen, Cheng; Yang, Fan; Wu, Xiaoling; Shen, Chuyang; Tey, Meng Khoon; You, Li

doi:10.1103/physreva.103.053303

Cited by 9 publications

(12 citation statements)

References 43 publications

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“…In the rest of the work, we will consider the propagation dynamics of the probe field, and show that a facilitated single-photon switching can be realized in the dual-channel system. For small and elongated atomic gases, we focus on evolution of the probe field along propagation z direction, while neglecting the diffraction as the optical medium is short [38,40,43]. The photon propagation in the medium is governed by the Hamiltonian, Ĥp = −c/L dz Ê † p (z, t)i∂ z Êp (z, t).…”

Section: Dressed-state Theorymentioning

confidence: 99%

“…In this work, we theoretically investigate the optical property of a dual-channel Rydberg ensemble [36][37][38][39][40], and illustrate that the facilitation mechanism can translate to an effective interaction to probe photons and can be directly measured by using atomic absorption spectrum. The system we consider consists of two optical channels that are remotely separated in space, in which the channel A is resonantly excited to a Rydberg state via electromagnetically induced transparency (EIT) [41], and coupled to the control channel B via long-range Rydberg interaction.…”

Section: Introductionmentioning

confidence: 99%

“…The system we consider consists of two optical channels that are remotely separated in space, in which the channel A is resonantly excited to a Rydberg state via electromagnetically induced transparency (EIT) [41], and coupled to the control channel B via long-range Rydberg interaction. Such a setting is available to realize experimentally with current techniques [38,40].…”

Section: Introductionmentioning

confidence: 99%

“…Based on these results, we demonstrate that the system proposed here can be used to design contactless single-photon switches. Different from stationary Rydberg single-photon switches [40,[42][43][44], the efficiency of the FIT-based photon switch can be manipulated dynamically.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Ding¹,

Bai²,

Huang³

et al. 2022

Preprint

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We investigate the facilitation induced transparency (FIT) enabled by strong and long-range Rydberg atom interaction between two spatially separated optical channels. In this setting, resonant two-photon excitation of Rydberg states in a gate channel is conditioned by a single Rydberg excitation in a control channel. Through the contactless coupling enabled by the Rydberg interaction, the optical transparency of the gate channel can be actively manipulated by steering the optical detuning in the control channel. By adopting a dressed-state picture, we identify two different interference pathways, one corresponding to Rydberg blockade and an emergent one contributed from facilitation. We show that the FIT is originated from the Rydberg interaction and the quantum interference between the two pathways, which is different from electromagnetically induced transparency by single-body laser-atom coupling. We found that the FIT in the dual-channel setting is robust and insensitive to systemic parameters, and can be extended to multi-channel regimes. Moreover, we demonstrate that such a FIT permits to realize controllable single-photon switch, which paves a route to detect Rydberg facilitation from optical absorption spectrum. Our study contributes to current efforts in probing correlated many-body dynamics and developing single photon devices with Rydberg atomic ensembles.

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Section: Dressed-state Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Ding¹,

Bai²,

Huang³

et al. 2022

Preprint

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“…Strong atomic interactions can be effectively mapped onto photon-photon interactions via electromagnetically induced transparency (EIT) [6]. Due to the cooperative effects, the optical nonlinearity can be greatly enhanced [6,[14][15][16]. Based on this, Rydberg EIT experiments are employed to measure a radio-frequency electric field [17] with a roomtemperature cell, and to realize few-photon optical nonlinearities [18][19][20][21] with an ultracold sample, such as the efficient single photon generation [18], entanglement generation between light and atomic excitations [20], singlephoton switches [16,19,22] and transistors [21,23,24].…”

Section: Introductionmentioning

confidence: 99%

Dephasing of ultracold cesium 80D_5/2-Rydberg electromagnetically induced transparency

et al. 2023

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We study Rydberg electromagnetically induced transparency (EIT) of a cascade three-level atom involving 80D 5/2 state in a strong interaction regime employing a cesium ultracold cloud. In our experiment, a strong coupling laser couples 6P 3/2 to 80D 5/2 transition, while a weak probe, driving 6S 1/2 to 6P 3/2 transition, probes the coupling induced EIT signal. At the two-photon resonance, we observe that the EIT transmission decreases slowly with time, which is a signature of interaction induced metastability. The dephasing rate γOD is extracted with optical depth OD = γODt. We find that the optical depth linearly increases with time at onset for a fixed probe incident photon number Rin before saturation. The dephasing rate shows a nonlinear dependence on Rin. The dephasing mechanism is mainly attributed to the strong dipole-dipole interactions, which leads to state transfer from nD 5/2 to other Rydberg states. We demonstrate that the typical transfer time τ 0(80D) obtained by the state selective field ionization technique is comparable with the decay time of EIT transmission τ 0(EIT) . The presented experiment provides a useful tool for investigating the strong nonlinear optical effects and metastable state in Rydberg many-body systems.

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Wheeler’s delayed-choice experiment based on Rydberg atoms

Ye¹,

Xu²,

Kuang³

et al. 2022

J. Phys. B: At. Mol. Opt. Phys.

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The delayed choice gedanken-experiment initially proposed by J A Wheeler reveals the nontrivial features of wave–particle duality in quantum world, that is, the choice of whether to observe the particle/wave character of a quantum system at a delayed time can affect its evolution history. In this work, the Wheeler’s delayed-choice experiment is conducted and tested in a new regime based on a Rydberg-ground level atomic Mach–Zehnder interferometer with optical coherent manipulation. Our quantum system exhibits an excellent single-excitation of the collective atomic state due to the Rydberg blockade effect, and the delayed choice of the interferometer configuration is realized by a quantum random number generator based on high-quality Rydberg single-photon source. Our experimental results demonstrate the Wheeler’s nontrivial time order inversion in this quantum system and confirm the Copenhagen interpretation of the physical reality of quantum state, which means the particle/wave character can only be ascribed to a quantum system when it was measured. This work is encouraging toward testing the foundations of quantum mechanics using the Rydberg atoms.

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Two-color optical nonlinearity in an ultracold Rydberg atom gas mixture

Cited by 9 publications

References 43 publications

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Dephasing of ultracold cesium 80D_5/2-Rydberg electromagnetically induced transparency

Wheeler’s delayed-choice experiment based on Rydberg atoms

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Two-color optical nonlinearity in an ultracold Rydberg atom gas mixture

Cited by 9 publications

References 43 publications

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions

Dephasing of ultracold cesium 80D5/2-Rydberg electromagnetically induced transparency

Wheeler’s delayed-choice experiment based on Rydberg atoms

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Dephasing of ultracold cesium 80D_5/2-Rydberg electromagnetically induced transparency