Quantum Optical Memory Protocols in Atomic Ensembles

Chanelière, Thierry; Hétet, G.; Sangouard, Nicolas

doi:10.1016/bs.aamop.2018.02.002

Cited by 29 publications

(20 citation statements)

References 122 publications

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“…In this regime, the optical transitions are generally buried within a broad inhomogeneous absorption line, preventing direct coherent control. This issue is however routinely addressed either by isolating a narrow spectral subset of ions via spectral hole burning [55], or by rephasing techniques such as photon echo whose precision has been boosted recently in the quest towards quantum storage [56,57]. Applying these techniques to mechanically engineered rare-earth materials (e.g.…”

Section: B Perspectivesmentioning

confidence: 99%

Optomechanical backaction processes in a bulk rare-earth doped crystal

Louchet-Chauvet,

Verlot,

Poizat

et al. 2021

Preprint

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We investigate a novel hybrid system composed of an ensemble of room temperature rare-earth ions embedded in a bulk crystal, intrinsically coupled to internal strain via the surrounding crystal field. We evidence the generation of a mechanical response under resonant light excitation. Thanks to an ultra-sensitive time-and space-resolved photodeflection setup, we interpret this motion as the sum of two resonant optomechanical backaction processes: a conservative, piezoscopic process induced by the optical excitation of a well-defined electronic configuration, and a dissipative, nonradiative photothermal process related to the phonons generated throughout the atomic population relaxation. Parasitic heating processes, namely off-resonant dissipative contributions, are absent. This work demonstrates an unprecedented level of control of the conservative and dissipative relative parts of the optomechanical backaction, confirming the potential of rare-earth-based systems as promising hybrid mechanical systems.

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Section: B Perspectivesmentioning

confidence: 99%

Optomechanical backaction processes in a bulk rare-earth doped crystal

Louchet-Chauvet,

Verlot,

Poizat

et al. 2021

Preprint

Self Cite

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“…It is worth pointing out that the common features between different delay mechanisms (for example, the ATS delay due to the polarization-mediated coherence exchange between spin and photonic modes, or the AFC delay due to periodic dephasing and rephasing of polarization) are a consequence of the fact that signal delay through a linear system (in these cases, the quantum memory medium) depends only on the shape of absorption (and associated dispersion) profile of that system regardless of the physical origin (i.e.. light-induced absorption peaks of ATS or stationary absorption combs of the AFC). This principle is the essence of linear spectral- filtering theory for classical signal processing and can also be used to describe the presented features of the different delay mechanisms [31][32][33] as an alternative to the Maxwell-Bloch treatment in this work.…”

Section: Dispersion-vs-absorption Based Signal Delaymentioning

confidence: 99%

Discerning quantum memories based on electromagnetically-induced-transparency and Autler-Townes-splitting protocols

et al. 2019

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Electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS) are similar, but different quantum optical phenomena: EIT results from a Fano interference, whereas ATS is described by the AC-Stark effect. Likewise, despite their close resemblance, light-storage techniques based on the EIT memory protocol and the recently-proposed ATS memory protocol (E. Saglamyurek et al. Nature Photonics 12, 2018) are distinct: the EIT protocol relies on adiabatic elimination of absorption, whereas the ATS protocol is based on absorption. In this article, we elaborate on the distinction between EIT and ATS memory protocols through numerical analysis and experimental demonstrations in a cold rubidium ensemble. We find that their storage characteristics manifest opposite limits of the light-matter interaction due to their inherent adiabatic vs. non-adiabatic nature. Furthermore, we determine optimal memory conditions for each protocol and analyze ambiguous regimes in the case of broadband storage, where non-optimal memory implementations can possess characteristics of both EIT and ATS protocols. We anticipate that this investigation will lead to deeper understanding and improved technical development of quantum memories, while clarifying distinctions between the EIT and ATS protocols.

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“…Weak first pulse (θ 1 (0) π) This case typically corresponds to quantum memory schemes based on the photon echo in ensembles [19,50]. Assuming θ 1 (0) π, Eq.…”

Section: Standard Photon Echo (π/2π)-excitationmentioning

confidence: 99%

Two-pulse photon echo area theorem in an optically dense medium

Urmancheev¹,

Gerasimov²,

Minnegaliev³

et al. 2019

Opt. Express

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We perform a theoretical and experimental study of the two-pulse photon echo area conservation law in an optically dense medium. The experimental properties of the echo signal are studied at 4K on the optical transition 3 H 6 (1)→ 3 H 4 (1) (793 nm) of Tm 3+ in a YAG crystal for a wide range of pulse areas of the two incoming light pulses, up to θ 1 ≈ 4π and θ 2 ≈ 7π respectively, with optical depth 1.5. We analyze the experimental data by using the analytic solution of the photon echo area theorem for plane waves. We find that the transverse Gaussian spatial profile of the beam leads to an attenuation of the echo area nutation as function of θ 1 and θ 2. Additional spatial filtering of the photon echo beam allows to recover this nutation. The experimental data are in good agreement with the solution of photon echo pulse area theorem for weak incoming pulse areas θ 1,2 π. However at higher pulse areas, the observations diverge from the analytic solution requiring further theoretical and experimental studies.

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Quantum Optical Memory Protocols in Atomic Ensembles

Cited by 29 publications

References 122 publications

Optomechanical backaction processes in a bulk rare-earth doped crystal

Optomechanical backaction processes in a bulk rare-earth doped crystal

Discerning quantum memories based on electromagnetically-induced-transparency and Autler-Townes-splitting protocols

Two-pulse photon echo area theorem in an optically dense medium

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