Nonclassical correlations between a C-band telecom photon and a stored spin-wave

Farrera, Pau; Maring, Nicolas; Albrecht, Boris; Heinze, Georg; Riedmatten, Hugues de

doi:10.1364/optica.3.001019

Cited by 37 publications

(46 citation statements)

References 46 publications

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“…Relationship between CSI violation and Bell-type inequality violation -We briefly mention how to relate the CSI to Bell-type inequalities; see for example a similar discussion in Ref. [39]. Let us stress first that experimental violation of a Bell inequality witnesses a much stronger form of non-classicality, related to entanglement, than CSI violation does (see for example the discussion in [36]).…”

Section: Primer On the Cauchy-schwartz Inequality For Correlated Pmentioning

confidence: 99%

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

et al. 2018

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We propose and demonstrate a versatile technique to measure the lifetime of the one-phonon Fock state using two-color pump-probe Raman scattering and spectrally resolved, time-correlated photon counting. Following pulsed laser excitation, the n=1 phonon Fock state is probabilistically prepared by projective measurement of a single Stokes photon. The detection of an anti-Stokes photon generated by a second, time-delayed laser pulse probes the phonon population with subpicosecond time resolution. We observe strongly nonclassical Stokes-anti-Stokes correlations, whose decay maps the single phonon dynamics. Our scheme can be applied to any Raman-active vibrational mode. It can be modified to measure the lifetime of n≥1 Fock states or the phonon quantum coherences through the preparation and detection of two-mode entangled vibrational states.

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Section: Primer On the Cauchy-schwartz Inequality For Correlated Pmentioning

confidence: 99%

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

et al. 2018

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“…In this perspective, recent frequency conversion experiments of photons correlated with a rubidium quantum memory have been performed at Osaka University [181] and at ICFO-Barcelona (Spain) [182].…”

Section: A Quantum Interfaces For Coherent Wavelength Transpositionmentioning

confidence: 99%

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Alibart¹,

D’Auria²,

Micheli³

et al. 2016

J. Opt.

161

116

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Integrated optical components on lithium niobate play a major role in standard high-speed communication systems. Over the last two decades, after the birth and positioning of quantum information science, lithium niobate waveguide architectures have emerged as one of the key platforms for enabling photonics quantum technologies. Due to mature technological processes for waveguide structure integration, as well as inherent and efficient properties for nonlinear optical effects, lithium niobate devices are nowadays at the heart of many photon-pair or triplet sources, single-photon detectors, coherent wavelength-conversion interfaces, and quantum memories. Consequently, they find applications in advanced and complex quantum communication systems, where compactness, stability, efficiency, and interconnectability with other guided-wave technologies are required. In this review paper, we first introduce the material aspects of lithium niobate, and subsequently discuss all of the above mentioned quantum components, ranging from standard photon-pair sources to more complex and advanced circuits.

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“…To be compatible with large-scale fiber networks, the nearinfrared wavelength around 852 nm of the obtained nonclassical state can be converted to telecommunication wavelength by using the cascade schemes [39,40] or on-chip frequency converters [41][42][43].…”

Section: Discussionmentioning

confidence: 99%

Direct observation of broadband nonclassical states in a room-temperature light–matter interface

Dou¹,

Yang²,

Du³

et al. 2018

npj Quantum Inf

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Nonclassical state is an essential resource for quantumenhanced communication, computing and metrology to outperform their classical counterpart. The nonclassical states that can operate at high bandwidth and room temperature while being compatible with quantum memory are highly desirable to enable the scalability of quantum technologies. Here, we present a direct observation of broadband nonclasscal states in a room-temperature lightmatter interface, where the atoms can also be controlled to store and interfere with photons. With a single coupling pulse and far off-resonance configuration, we are able to induce a multi-field interference between light and atoms to create the desired nonclassical states by spectrally selecting the two correlated photons out of seven possible emissions. We explicitly confirm the nonclassicality by observing a cross correlation up to 17 and a violation of Cauchy-Schwarz inequality with 568 standard deviations. Our results demonstrate the potential of a state-built-in, broadband and room-temperature light-matter interface for scalable quantum information networks.

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Nonclassical correlations between a C-band telecom photon and a stored spin-wave

Cited by 37 publications

References 46 publications

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Direct observation of broadband nonclassical states in a room-temperature light–matter interface

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