Photon echo with a few photons in two-level atoms

Bonarota, M.; Dajczgewand, Julian; Louchet-Chauvet, Anne; Gouët, J.-L. Le; Chanelière, Thierry

doi:10.1088/1054-660x/24/9/094003

Cited by 27 publications

(18 citation statements)

References 37 publications

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“…The ROSE scheme is free from the noise induced by the inversion of medium population in the conventional two-pulse photon echo scheme [34], thus has the potential to demonstrate optical storage at the single-photon level [31] [35]. In ROSE scheme, a second rephasing pulse is applied to bring the atoms excited by the first rephasing pulse back to the ground state, and to reverse the phases of them, leading to a secondary echo.…”

Section: B Rose Storagementioning

confidence: 99%

Reliable coherent optical memory based on a laser-written waveguide

Liu¹,

Zhou²,

Zhu³

et al. 2020

Optica

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151 Eu 3+ -doped yttrium silicate ( 151 Eu 3+ : Y 2 SiO 5 ) crystal is a unique material that possesses hyperfine states with coherence time up to 6 h. Many efforts have been devoted to the development of this material as optical quantum memories based on the bulk crystals, but integrable structures (such as optical waveguides) that can promote 151 Eu 3+ : Y 2 SiO 5 -based quantum memories to practical applications, have not been demonstrated so far. Here we report the fabrication of type II waveguides in a 151 Eu 3+ : Y 2 SiO 5 crystal using femtosecond-laser micromachining. The resulting waveguides are compatible with single-mode fibers and have the smallest insertion loss of 4.95 dB. On-demand light storage is demonstrated in a waveguide by employing the spinwave atomic frequency comb (AFC) scheme and the revival of silenced echo (ROSE) scheme. We implement a series of interference experiments based on these two schemes to characterize the storage fidelity. Interference visibility of the readout pulse is 0.99 ± 0.03 for the spin-wave AFC scheme and 0.97 ± 0.02 for the ROSE scheme, demonstrating the reliability of the integrated optical memory.

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Section: B Rose Storagementioning

confidence: 99%

Reliable coherent optical memory based on a laser-written waveguide

Liu¹,

Zhou²,

Zhu³

et al. 2020

Optica

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“…However, since these protocols are based on strong rephasing pulses at the same frequency as the retrieved echo, the ability to use them as a quantum memory remains technically challenging. In a different system, the ROSE protocol was limited to input weak coherent states of 14 photons per pulse, due to the noise created by the strong control pulses [27].…”

Section: Introductionmentioning

confidence: 99%

Storage of up-converted telecom photons in a doped crystal

et al. 2014

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We report on an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a + Pr 3 :Y SiO 2 5 crystal. We convert the telecom photons at 1570 nm to 606 nm using a periodically-poled potassium titanyl phosphate nonlinear waveguide. The maximum device efficiency (which includes all optical loss) is inferred to be η = ± 22 1% dev max (internal efficiency η = ± 75 8% int ) with a signal to noise ratio exceeding 1 for single-photon-level pulses with durations of up to 560 ns. The converted light is then stored in the crystal using the atomic frequency comb scheme with storage and retrieval efficiencies exceeding η = 20% AFC for predetermined storage times of up to μ 5 s. The retrieved light is time delayed from the noisy conversion process allowing us to measure a signal to noise ratio exceeding 100 with telecom single-photon-level inputs. These results represent the first demonstration of single-photon-level optical storage interfaced with frequency up-conversion.

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“…We consider a propagation constant given bỹ excitation of the wings). The Lorentzian 1 1 + iω/Γ 0 simplifies to the first order in Γ 0 iω leading to the solution in the spectral domain: 42) or alternatively in the time domain…”

Section: Dispersion Of a Lorentzianmentioning

confidence: 99%

Quantum Optical Memory Protocols in Atomic Ensembles

Chanelière

Hétet

Sangouard

2018

Advances in Atomic, Molecular, and Optical Physics

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We review a series of quantum memory protocols designed to store the quantum information carried by light into atomic ensembles. In particular, we show how a simple semiclassical formalism allows to gain insight into various memory protocols and to highlight strong analogies between them. These analogies naturally lead to a classification of light storage protocols into two categories, namely photon echo and slow-light memories. We focus on the storage and retrieval dynamics as a key step to map the optical information into the atomic excitation. We finally review various criteria adapted for both continuous variables and photon-counting measurement techniques to certify the quantum nature of these memory protocols.

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Photon echo with a few photons in two-level atoms

Cited by 27 publications

References 37 publications

Reliable coherent optical memory based on a laser-written waveguide

Reliable coherent optical memory based on a laser-written waveguide

Storage of up-converted telecom photons in a doped crystal

Quantum Optical Memory Protocols in Atomic Ensembles

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