Nonlinear Interactions and Non-classical Light

Strekalov, Dmitry; Leuchs, Gerd

doi:10.1007/978-3-319-98402-5_3

Cited by 15 publications

(18 citation statements)

References 296 publications

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“…In summary, we demonstrated EIT-based LSR and SLPs for weak coherent light pulses containing as low asn = 1.1(2) photons per pulse, implemented in a medium of cold atoms inside a HCPBGF. We observed a LSR and SLP efficiency of up to 0.36(4) and 0.16 (2), respectively, with an unconditional noise floor ofn noise = 0.017(4) photons per pulse. This was enabled, amongst others, by a careful characterization of a strongly birefringent HCPBGF, resulting in an efficient suppression of noise.…”

Section: Discussionmentioning

confidence: 89%

“…This small signal in addition is delayed with respect to the switch-off time of the backward control field. The delayed read-out can be well-explained by considering the SLP group velocity v SLP gr = v gr cos 2φ with tan 2 [48]. For Ω − c /Ω + c = 1.84 the SLP propagates backward at around −0.55 × v gr during ∆t SLP and thus exits the medium at later times during the retrieval in the forward direction.…”

Section: Stationary Light Pulsesmentioning

confidence: 99%

“…Optical quantum information processing [1] requires generation, processing and detection of individual photons. Huge efforts have been dedicated to building high-brightness single-photon sources [2], implementing efficient quantum memories [3,4], and developing schemes to provide strong light-matter coupling, allowing for interactions between individual photons [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Single-photon-level narrowband memory in a hollow-core photonic bandgap fiber

Peters¹,

Wang²,

Neumann³

et al. 2020

Opt. Express

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An experimental platform operating at the level of individual quanta and providing strong light-matter coupling is a key requirement for quantum information processing. In our work, we show that hollow-core photonic bandgap fibers filled with laser-cooled atoms might serve as such a platform, despite their typical complicated birefringence properties. To this end, we present a detailed theoretical and experimental study to identify a fiber with suitable properties to achieve operation at the single-photon level. In the fiber, we demonstrate the storage and on-demand retrieval as well as the creation of stationary light pulses, based on electromagnetically induced transparency, for weak coherent light pulses down to the single-photon level with an unconditional noise floor of 0.017(4) photons per pulse. These results clearly demonstrate the prospects of such a fiber-based platform for applications in quantum information networks.

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Section: Discussionmentioning

confidence: 89%

Section: Stationary Light Pulsesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single-photon-level narrowband memory in a hollow-core photonic bandgap fiber

Peters¹,

Wang²,

Neumann³

et al. 2020

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Let H be an infinite dimensional (complex) Hilbert space, with orthonormal basis {|n } n∈N0 . This could for example be the space corresponding to a single mode of the electro-magnetic field [50]. For simplicity we consider X = R and define the feature map ϕ : R → H as…”

Section: Coherent States and Gaussian Kernelmentioning

confidence: 99%

“…Coherent states are commonly considered the most classical states in quantum optics, and are easy to simulate on a classical device. Working with a quantum device becomes interesting when the states become nonclassical [50]. When using the coherent feature map (19), the embedding of a sample (11) corresponds to the so-called cat-states [13,38,39].…”

Section: Coherent States and Gaussian Kernelmentioning

confidence: 99%

Quantum mean embedding of probability distributions

Kübler

Muandet

Schölkopf

2019

Phys. Rev. Research

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The kernel mean embedding of probability distributions is commonly used in machine learning as an injective mapping from distributions to functions in an infinite dimensional Hilbert space. It allows us, for example, to define a distance measure between probability distributions, called maximum mean discrepancy (MMD). In this work we propose to represent probability distributions in a pure quantum state of a system that is described by an infinite dimensional Hilbert space. This enables us to work with an explicit representation of the mean embedding, whereas classically one can only work implicitly with an infinite dimensional Hilbert space through the use of the kernel trick. We show how this explicit representation can speed up methods that rely on inner products of mean embeddings and discuss the theoretical and experimental challenges that need to be solved in order to achieve these speedups.

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A perspective on high photon flux nonclassical light and applications in nonlinear optics

Lamprou

Liontos

Papadakis

et al. 2020

High Pow Laser Sci Eng

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Nonclassical light sources have a vital role in quantum optics as they offer a unique resource for studies in quantum technology. However, their applicability is restricted by their low intensity, while the development of new schemes producing intense nonclassical light is a challenging task. In this perspective article, we discuss potential schemes that could be used towards the development of high photon flux nonclassical light sources and their future prospects in nonlinear optics.

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Nonlinear Interactions and Non-classical Light

Cited by 15 publications

References 296 publications

Single-photon-level narrowband memory in a hollow-core photonic bandgap fiber

Single-photon-level narrowband memory in a hollow-core photonic bandgap fiber

Quantum mean embedding of probability distributions

A perspective on high photon flux nonclassical light and applications in nonlinear optics

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