Telecom-heralded single-photon absorption by a single atom

Lenhard, Andreas; Bock, Matthias; Becher, Christoph; Kucera, Stephan; Brito, José; Eich, Pascal; Müller, Philipp; Eschner, J.

doi:10.1103/physreva.92.063827

Cited by 32 publications

(27 citation statements)

References 46 publications

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“…With this technique, photon sources with line widths in the MHz range could be demonstrated with various designs [8][9][10][11][12][13][14][15][16][17][18]. Interfacing such photons effectively with atomic transitions has also been demonstrated [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories

et al. 2016

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We report on a source of heralded narrowband (»3 MHz) single photons compatible with solid-state spin-wave quantum memories based on praseodymium doped crystals. Widely non-degenerate narrow-band photon pairs are generated using cavity enhanced down conversion. One photon from the pair is at telecom wavelengths and serves as heralding signal, while the heralded single photon is at 606 nm, resonant with an optical transition of Pr 3+:Y 2 SiO 5 . The source offers a heralding efficiency of 28% and a generation rate exceeding 2000pairs mW −1 in a single-mode. The single photon nature of the heralded field is confirmed by a direct antibunching measurement, with a measured antibunching parameter down to 0.010(4). Moreover, we investigate in detail photon cross-and autocorrelation functions proving non-classical correlations between the two photons. The results presented in this paper offer prospects for the demonstration of single photon spin-wave storage in an on-demand solid state quantum memory, heralded by a telecom photon.

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Section: Introductionmentioning

confidence: 99%

Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories

et al. 2016

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“…The only issue here is that most of the atomic transitions of typical cavity QED atoms, which couple resonantly to the single-mode radiation field, are not at telecom wavelength and therefore the field state is not suitable for long-distance transmission over optical fibers due to high losses. There are two possible approaches: realizing cascade transitions [46,47] or using wavelength conversion [48]. These experiments are subject to the generation or conversion of single photons.…”

Section: A Experimental Considerationsmentioning

confidence: 99%

Hybrid quantum repeater based on resonant qubit-field interactions

Bernád

2017

Phys. Rev. A

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We propose a hybrid quantum repeater based on ancillary coherent field states and material qubits coupled to optical cavities. For this purpose, resonant qubit-field interactions and postselective field measurements are determined which are capable of realizing all necessary two-qubit operations for the actuation of the quantum repeater. We explore both theoretical and experimental possibilities of generating near-maximally-entangled qubit pairs (F > 0.999) over long distances. It is shown that our scheme displays moderately low repeater rates, between 5 × 10 −4 and 23 pairs per second, over distances up to 900 km, and it relies completely on current technology of cavity quantum electrodynamics.

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“…Thus, there is a demand for interfaces connecting the telecom-wavelength regime and the visible/NIR range in a coherent way, i.e., preserving quantum information encoded in a degree of freedom of a single photon, such as its polarization. Promising candidates for such interfaces are, e.g., non-degenerate photon-pair sources [11,12,13] or quantum frequency converters (QFC) [14]. The latter can be implemented either by four-wave mixing (FWM) using resonances in cold atomic ensembles [15,16] or by a solid-state approach utilizing three-wave mixing in χ 2 -or four-wave mixing in χ 3nonlinear media [17].…”

Section: Introductionmentioning

confidence: 99%

High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion

et al. 2018

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Entanglement between a stationary quantum system and a flying qubit is an essential ingredient of a quantum-repeater network. It has been demonstrated for trapped ions, trapped atoms, color centers in diamond, or quantum dots. These systems have transition wavelengths in the blue, red or near-infrared spectral regions, whereas long-range fiber-communication requires wavelengths in the low-loss, low-dispersion telecom regime. A proven tool to interconnect flying qubits at visible/NIR wavelengths to the telecom bands is quantum frequency conversion. Here we use an efficient polarization-preserving frequency converter connecting 854 nm to the telecom O-band at 1310 nm to demonstrate entanglement between a trapped 40Ca+ ion and the polarization state of a telecom photon with a high fidelity of 98.2 ± 0.2%. The unique combination of 99.75 ± 0.18% process fidelity in the polarization-state conversion, 26.5% external frequency conversion efficiency and only 11.4 photons/s conversion-induced unconditional background makes the converter a powerful ion–telecom quantum interface.

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Telecom-heralded single-photon absorption by a single atom

Cited by 32 publications

References 46 publications

Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories

Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories

Hybrid quantum repeater based on resonant qubit-field interactions

High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion

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