Entanglement-Induced Two-Photon Transparency

Fei, Hong-Bing; Jost, Bradley M.; Popescu, Sandu; Saleh, Bahaa E. A.; Teich, Malvin C.

doi:10.1103/physrevlett.78.1679

Cited by 190 publications

(323 citation statements)

References 27 publications

(39 reference statements)

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“…Two-photon induced transparency and entangled-photon virtual-state spectroscopy Entangled virtual-state spectroscopy, proposed in , suggests a means to detect far off-resonant intermediate states in the excitation of f -states by employing entanglement-induced two-photon transparency (Fei et al, 1997): The transition amplitude (100) of entangled photons created by a cw-source oscillates as a function of the entanglement time T . For infinite excited-state lifetimes (γ e = 0), the excitation of f is even completely suppressed whenever (ω 1 − ω e )T = n × 2π ∀n ∈ N -the medium becomes transparent.…”

Section: Two-photon Absorption Vs Two-photon-induced Fluorescencementioning

confidence: 99%

Nonlinear optical signals and spectroscopy with quantum light

2016

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Conventional nonlinear spectroscopy uses classical light to detect matter properties through the variation of its response with frequencies or time delays. Quantum light opens up new avenues for spectroscopy by utilizing parameters of the quantum state of light as novel control knobs and through the variation of photon statistics by coupling to matter. We present an intuitive diagrammatic approach for calculating ultrafast spectroscopy signals induced by quantum light, focusing on applications involving entangled photons with nonclassical bandwidth properties -known as "time-energy entanglement". Nonlinear optical signals induced by quantized light fields are expressed using time ordered multipoint correlation functions of superoperators in the joint field plus matter phase space. These are distinct from Glauber's photon counting formalism which use normally ordered products of ordinary operators in the field space. One notable advantage for spectroscopy applications is that entangled photon pairs are not subjected to the classical Fourier limitations on the joint temporal and spectral resolution. After a brief survey of properties of entangled photon pairs relevant to their spectroscopic applications, different optical signals, and photon counting setups are discussed and illustrated for simple multi-level model systems.

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Section: Two-photon Absorption Vs Two-photon-induced Fluorescencementioning

confidence: 99%

Nonlinear optical signals and spectroscopy with quantum light

2016

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“…Applications to spectroscopy received considerable attention in experiments [6][7][8][9] as well as in theoretical works [10][11][12][13][14][15][16]. These prospects necessitate the adaption of quantum information concepts to spectroscopic applications.…”

Section: Introductionmentioning

confidence: 99%

Photon statistics of intense entangled photon pulses

Schlawin

Mukamel

2013

J. Phys. B: At. Mol. Opt. Phys.

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Time-and frequency-gated two-photon counting is given by a four-time correlation function of the electric field. This reduces to two times with purely time gating. We calculate this function for entangled photon pulses generated by parametric down-conversion. At low intensity, the pulses consist of well-separated photon pairs, and crossover to squeezed light as the intensity is increased. This is illustrated by the two-photon absorption signal of a three-level model, which scales linearly for a weak pump intensity where both photons come from the same pair, and gradually becomes nonlinear as the intensity is increased. We find that the strong frequency correlations of entangled photon pairs persist even for higher photon numbers. This could help facilitate the application of these pulses to nonlinear spectroscopy, where these correlations can be used to manipulate congested signals.

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“…Such a reduced wavelength can be interesting for an improved spatial resolution in different concepts of advanced imaging methods in the area of quantum imaging [11,12]. In addition, nonclassical spatial correlations between the photons can play a key role [13] for these advanced imaging methods. In this paper we report on the characterization of the spatial correlation strength of biphotons from parametric down conversion by Fraunhofer far field distributions behind a blazed grating.…”

Section: Introductionmentioning

confidence: 99%

Quantum diffraction of biphotons at a blazed grating

Ostermeyer¹,

Puhlmann²,

Korn³

2009

J. Opt. Soc. Am. B

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Abstract:Correlations between photons are interesting for a number of applications and concepts in metrology in particular for resolution improvements in different methods of quantum imaging. Since Fock-states of N-photons of wavelength λ in interference schemes acquire N-times the phase shift of single photons these states can appear as if they had a de Broglie wavelength of λ/N. A biphoton beam diffracted at a blazed grating shows this reduced de Broglie wavelength. This experiment can be seen as a purification of biphotons of a certain correlation strength on the one hand. On the other hand the evaluation of the one-photon and two-photon rate distributions in the Fraunhofer far field of the grating allows for an analysis of the spatial correlation between the photons. An experimental demonstration of these ideas tested for a biphoton beam generated by parametric down conversion (PDC) is reported. We demonstrate in addition that the existence of higher order spatial modes is important to observe strong spatial correlations and to observe the photonic de Broglie wavelength of λ/2 for biphotons.

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Entanglement-Induced Two-Photon Transparency

Cited by 190 publications

References 27 publications

Nonlinear optical signals and spectroscopy with quantum light

Nonlinear optical signals and spectroscopy with quantum light

Photon statistics of intense entangled photon pulses

Quantum diffraction of biphotons at a blazed grating

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