Two-dimensional characterization of spatially entangled photon pairs

Ostermeyer, Martin; Korn, D.; Puhlmann, Dirk; Henkel, Carsten; Eisert, Jens

doi:10.1080/09500340903359962

Cited by 13 publications

(15 citation statements)

References 29 publications

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“…We build on these results by considering two optical pulses in the initial state, and investigate their scattering on the TLE for various pulse widths and separations. The twophoton input states can be experimentally produced using, for example, parametric down-conversion, as has been demonstrated [39][40][41]. In general, such a process creates two correlated photons, but the properties of the down-conversion crystal can be modified in such a way that uncorrelated photons are produced [42].…”

Section: Two-photon Input Statementioning

confidence: 99%

Scattering of two photons on a quantum emitter in a one-dimensional waveguide: exact dynamics and induced correlations

et al. 2015

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We develop a wavefunction approach to describe the scattering of two photons on a quantum emitter embedded in a one-dimensional waveguide. Our method allows us to calculate the exact dynamics of the complete system at all times, as well as the transmission properties of the emitter. We show that the nonlinearity of the emitter with respect to incoming photons depends strongly on the emitter excitation and the spectral shape of the incoming pulses, resulting in transmission of the photons which depends crucially on their separation and width. In addition, for counter-propagating pulses, we analyze the induced level of quantum correlations in the scattered state, and we show that the emitter behaves as a nonlinear beam-splitter when the spectral width of the photon pulses is similar to the emitter decay rate.

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Section: Two-photon Input Statementioning

confidence: 99%

Scattering of two photons on a quantum emitter in a one-dimensional waveguide: exact dynamics and induced correlations

et al. 2015

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“…The explanation of this puzzling experimental observation springs from the transverse mode structure of the pump with two intensity maxima that creates a superposition of two macroscopically distinguishable wave vectors of the signal photon. In the case of a Gaussian pump with a single maximum no such superposition arises (18).…”

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confidence: 99%

Wave-particle dualism and complementarity unraveled by a different mode

Menzel

Puhlmann

Heuer

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

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The precise knowledge of one of two complementary experimental outcomes prevents us from obtaining complete information about the other one. This formulation of Niels Bohr's principle of complementarity when applied to the paradigm of wave-particle dualism-that is, to Young's double-slit experiment-implies that the information about the slit through which a quantum particle has passed erases interference. In the present paper we report a double-slit experiment using two photons created by spontaneous parametric down-conversion where we observe interference in the signal photon despite the fact that we have located it in one of the slits due to its entanglement with the idler photon. This surprising aspect of complementarity comes to light by our special choice of the TEM 01 pump mode. According to quantum field theory the signal photon is then in a coherent superposition of two distinct wave vectors giving rise to interference fringes analogous to two mechanical slits.T he double-slit experiment has served as a source of inspiration for more than two centuries. Indeed, Thomas Young (1) has used it to argue in favor of the wave theory of light rather than the corpuscular one of Isaac Newton (2). In the early days of quantum mechanics it was central to the dialogue (3) between Albert Einstein and Bohr on epistemological problems in atomic physics. Moreover, it was the starting point of the path integral formulation (4) of quantum mechanics by Richard Feynman.Today the question of "which-slit" versus "interference" in the double-slit configuration (5) is as fascinating and relevant (6) as it was in the early days of quantum mechanics. In particular, the understanding of the physical origin (7) of the disappearance of the fringes in the presence of which-slit information has come a long way. Werner Heisenberg in the context of the uncertainty relation (8), Bohr in his discussion with Einstein (3) on the recoiling slit, and others (9) have argued in favor of an uncontrollable momentum transfer (7). However, the Gedanken experiments of the quantum eraser (10) and the micromaser "welcher Weg" detector (11) have identified entanglement and the availability of information as the main culprit. Indeed, the seminal atom interferometer experiment (12) as well as the realization (13) of the quantum eraser have made a clear decision against momentum transfer in favor of entanglement. As a result, today the principle of complementarity (14) is widely accepted (15) in the form (16): "If information on one complementary variable is in principle available even if we choose not to 'know' it… we will lose the possibility of knowing the precise value of the other complementary variable."In the present paper we report the results of a double-slit experiment that brings out an additional layer of this principle. We employ the entanglement between the signal and the idler photon created in spontaneous parametric down-conversion (SPDC) (17) to obtain by a coincidence measurement of the two photons which-slit information about the signal ...

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“…or with programmable optical devices [157]. Imaging of transverse spatial entanglement uses either a raster scanning method [158] or low-light imaging devices [159]. An alternative approach to spatial entanglement is by proper domain engineering and linear chirping of quasi phase-matched crystals [160,161].…”

Section: Spatial Entanglementmentioning

confidence: 99%

Entangled Photon-Pair Sources based on three-wave mixing in bulk crystals

Anwar,

Perumangatt,

Steinlechner

et al. 2020

Preprint

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Entangled photon-pairs are a critical resource in quantum communication protocols ranging from quantum key distribution to teleportation. The current workhorse technique for producing photon-pairs is via spontaneous parametric down conversion (SPDC) in bulk nonlinear crystals. The increased prominence of quantum networks has led to growing interest in deployable high performance entangled photon-pair sources. This manuscript provides a review of the state-of-the-art for bulk-optics-based SPDC sources with continuous wave pump, and discusses some of the main considerations when building for deployment.

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Two-dimensional characterization of spatially entangled photon pairs

Cited by 13 publications

References 29 publications

Scattering of two photons on a quantum emitter in a one-dimensional waveguide: exact dynamics and induced correlations

Scattering of two photons on a quantum emitter in a one-dimensional waveguide: exact dynamics and induced correlations

Wave-particle dualism and complementarity unraveled by a different mode

Entangled Photon-Pair Sources based on three-wave mixing in bulk crystals

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