Single-Photon Storage in a Ground-State Vapor Cell Quantum Memory

Buser, Gianni; Mottola, Roberto; Björn, Cotting,; Wolters, Janik; Treutlein, Philipp

doi:10.1103/prxquantum.3.020349

Cited by 39 publications

(25 citation statements)

References 50 publications

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“…There is not much physical insight to be gained by studying equation ( 14), with the subtleties of the atom-light interactions and the role of the polarisation of the light being obfuscated by the notation. In appendix A we provide a different approach to calculating relative linestrengths, by explicitly performing the decoupling of angular momentum in the uncoupled basis; more physical insight is gleaned form this alternative method of calculation (at the expense of the calculations taking longer) 6 .…”

Section: Relative Linestrengthsmentioning

confidence: 99%

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

et al. 2022

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The spectroscopy of hot atomic vapours is a hot topic. Many of the work-horse techniques of contemporary atomic physics were first demonstrated in hot vapours. Alkali-metal atomic vapours are ideal media for quantum-optics experiments as they combine: a large resonant optical depth; long coherence times; and well-understood atom-atom interactions. These features aid with the simplicity of both the experimental set up and the theoretical framework. The topic attracts much attention as these systems are ideal for studying both fundamental physics and has numerous applications, especially in sensing electromagnetic fields and quantum technology. This tutorial reviews the necessary theory to understand the Doppler broadened absorption spectroscopy of alkali-metal atoms, and explains the data taking and processing necessary to compare theory and experiment. The aim is to provide a gentle introduction to novice scientists starting their studies of the spectroscopy of thermal vapours whilst also calling attention to the application of these ideas in the contemporary literature. In addition, the work of expert practitioners in the field is highlighted, explaining the relevance of three extensively-used software packages that complement the presentation herein.

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Section: Relative Linestrengthsmentioning

confidence: 99%

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

et al. 2022

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“…7(f)]. In parallel, the rubidium quantum memory that suits storing quantum-dot photons is also under development [314–316] . These memories employ electromagnetically induced transparency to store external single photons at room temperatures.…”

Section: Quantum Dots For Quantum Networkmentioning

confidence: 99%

“…These memories employ electromagnetically induced transparency to store external single photons at room temperatures. The state-of-the-art memory [316] can store single photons of 370 MHz linewidth at 795 nm (created by a χ(2) nonlinear crystal rather than using a deterministic quantum-dot source) with an end-to-end efficiency of 1.1% and a signal-to-noise ratio of 10.8. To store photons from quantum dots, the memory bandwidth has to match the quantum-dot linewidth (∼600 MHz), and the collection efficiency of the source needs to be improved.…”

Section: Quantum Dots For Quantum Networkmentioning

confidence: 99%

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

2022

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Epitaxial quantum dots formed by III-V compound semiconductors are excellent sources of nonclassical photons, creating single photons and entangled multi-photon states on demand. Their semiconductor nature allows for a straightforward combination with mature integrated photonic technologies, leading to novel functional devices at the single-photon level. Integrating a quantum dot into a carefully engineered photonic cavity enables control of the radiative decay rate using the Purcell effect and the realization of photon-photon nonlinear gates. In this review, we introduce the basis of epitaxial quantum dots and discuss their applications as non-classical light sources. We highlight two interfaces-one between flying photons and the quantum-dot dipole, and the other between the photons and the spin. We summarize the recent development of integrated photonics and reconfigurable devices that have been combined with quantum dots or are suitable for hybrid integration. Finally, we provide an outlook of employing quantum-dot platforms for practical applications in large-scale quantum computation and the quantum Internet.

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“…Subsequent retrieval of the spin-wave excitation into the input optical mode can then be performed at some chosen time that is smaller than the spin-wave lifetime. Light storage for up to 1 s 12 and single-photon operation 13,14 have been demonstrated in separate experiments in warm atomic vapors.…”

Section: Introductionmentioning

confidence: 99%

Multiplexed random-access optical memory in warm cesium vapor

Meßner¹,

Robertson²,

Esguerra³

et al. 2023

Preprint

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The ability to store large amounts of photonic quantum states is regarded as substantial for future optical quantum computation and communication technologies. However, research for multiplexed quantum memories has been focused on systems that show good performance only after an elaborate preparation of the storage media. This makes it generally more difficult to apply outside a laboratory environment. In this work, we demonstrate a multiplexed random-access memory to store up to four optical pulses using electromagnetically induced transparency in warm cesium vapor. Using a Λ-System on the hyperfine transitions of the Cs D1 line, we achieve a mean internal storage efficiency of 36% and a 1/e lifetime of 3.2 µs. In combination with future improvements, this work facilitates the implementation of multiplexed memories in future quantum communication and computation infrastructures.

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Single-Photon Storage in a Ground-State Vapor Cell Quantum Memory

Cited by 39 publications

References 50 publications

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

Multiplexed random-access optical memory in warm cesium vapor

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