High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip

Mazeas, Florent; Traetta, Michele; Bentivegna, Marco; Kaiser, Florian; Aktas, Djeylan; Zhang, Weiwei; Ramos, Carlos; Ngah, Lutfi Arif; Lunghi, Tommaso; Picholle, Éric; Belabas, Nadia; Roux, Xavier Le; Cassan, Éric; Marris‐Morini, Delphine; Vivien, Laurent; Sauder, Grégory; Labonté, Laurent; Tanzilli, Sébastien

doi:10.1364/oe.24.028731

Cited by 70 publications

(64 citation statements)

References 32 publications

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“…(Here, instead of using two interferometers, we sent signal and idler sidebands (S 2−4 I 2−4 ) through one interferometer and they were split at the output using a pulse shaper.) The interference pattern is similar to those reported in previous microcavity BFC experiments that examined only a single signal-idler pair [4,9,10]. The high visibility [16] shows for the first time that we maintain energy-time entanglement even for biphotons consisting of a multiplicity of sideband mode pairs.…”

Section: Compiled June 13 2017supporting

confidence: 85%

“…These demonstrations suggest the use of chip-scale sources for high-dimensional quantum processing [11][12][13]. However, studies such as [4,9,10] only focused on single sideband pairs-the multifrequency nature of their sources (important for high-dimensional quantum processing) was not explored. In this Letter, we present the first examination of the time-frequency signatures of an on-chip BFC generated from a silicon nitride microring resonator.…”

Section: Compiled June 13 2017mentioning

confidence: 99%

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Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb

Jaramillo-Villegas

Imany

Odele

et al. 2017

Optica

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We investigate the time-frequency signatures of an on-chip biphoton frequency comb (BFC) generated from a silicon nitride microring resonator. Using a Franson interferometer, we examine, for the first time, the multifrequency nature of the photon pair source in a time entanglement measurement scheme; having multiple frequency modes from the BFC results in a modulation of the interference pattern. This measurement together with a Schmidt mode decomposition shows that the generated continuous variable energy-time entangled state spans multiple pair-wise modes. Additionally, we demonstrate nonlocal dispersion cancellation, a foundational concept in time-energy entanglement, suggesting the potential of the chip-scale BFC for large-alphabet quantum key distribution. © 2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Quantum information processing (QIP) promises to improve the security of our communications as well as to solve some algorithms with exponential complexity in polynomial time [1]. The fundamental unit of quantum information is based on a superposition of two states, the so-called qubit. It has been proposed to extend this concept to a superposition of many states (known as a high-dimensional state) for higher density information encodings, fault-tolerant quantum computing, and even for secure protocols in dense quantum key distribution.Entangled photon pairs have been demonstrated as one of the most promising platforms for implementing QIP systems. In recent years, generation of entangled photons on chip has gained attention because of its reduced cost and compatibility with semiconductor foundries [2][3][4][5]. Despite Biphoton Frequency Combs (BFC) have been generated using cavity-filtered broadband biphotons [6] and cavity-enhanced spontaneous parametric down conversion [7], it was only recently that on-chip microresonators have been used to generate entangled photons in the form of a BFC [8][9][10]. These demonstrations suggest the use of chip-scale sources for high-dimensional quantum processing [11][12][13]. However, studies such as [4, 9, 10] only focused on single sideband pairs-the multifrequency nature of their sources (important for high-dimensional quantum processing) was not explored. In this Letter, we present the first examination of the time-frequency signatures of an on-chip BFC generated from a silicon nitride microring resonator. Through Franson interferometry and a demonstration of nonlocal dispersion compensation, we are able to examine the multifrequency nature of our photon-pair source. Figure 1 is a depiction of our experimental setup. To generate our BFC, we use a tunable continuous-wave (CW) laser to pump a microring at the resonance located at the frequency ω p (λ p ∼ 1550.9 nm). Through spontaneous four-wave mixing process, two pump photons decay int...

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Section: Compiled June 13 2017supporting

confidence: 85%

Section: Compiled June 13 2017mentioning

confidence: 99%

Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb

Jaramillo-Villegas

Imany

Odele

et al. 2017

Optica

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“…To overcome these disadvantages, integrated optical microresonators offer a solution that is highly compatible with semiconductor foundries. Such chipscale devices have been used to generate entangled photons with a comb-like spectrum [20][21][22]. Time-bin entanglement for a single comb line pair from microresonators has been verified in [20,21,23], and in [22] time-bin entanglement was demonstrated for multiple comb line pairs simultaneously.…”

Section: Introductionmentioning

confidence: 99%

50-GHz-spaced comb of high-dimensional frequency-bin entangled photons from an on-chip silicon nitride microresonator

Imany¹,

Jaramillo-Villegas²,

Odele³

et al. 2018

Opt. Express

177

154

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Quantum frequency combs from chip-scale integrated sources are promising candidates for scalable and robust quantum information processing (QIP). However, to use these quantum combs for frequency domain QIP, demonstration of entanglement in the frequency basis, showing that the entangled photons are in a coherent superposition of multiple frequency bins, is required. We present a verification of qubit and qutrit frequency-bin entanglement using an on-chip quantum frequency comb with 40 mode pairs, through a two-photon interference measurement that is based on electro-optic phase modulation. Our demonstrations provide an important contribution in establishing integrated optical microresonators as a source for high-dimensional frequency-bin encoded quantum computing, as well as dense quantum key distribution.

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“…More importantly, this concept also provides a solution for state scalability and complexity by allowing several frequency modes (compatible with telecommunications wavelength-division multiplexing channels) to be accessible within a single waveguide spatial mode, and straightforward access to entanglement, superposition, and multi-partite states. Several multi-channel sources based on QFCs have already been demonstrated, among them combs of correlated photons 12 , cross-polarized photon pairs 14 , entangled photon pairs 7,15,16 , multi-photon states 7 , and frequency-bin entangled states [8][9][10] .…”

Section: Quantum Frequency Combsmentioning

confidence: 99%

Integrated generation of complex optical quantum states and their coherent control

Roztocki¹,

Kues

Reimer³

et al. 2018

Nanophotonics Australasia 2017

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Complex optical quantum states based on entangled photons are essential for investigations of fundamental physics and are the heart of applications in quantum information science. Recently, integrated photonics has become a leading platform for the compact, cost-efficient, and stable generation and processing of optical quantum states. However, onchip sources are currently limited to basic two-dimensional (qubit) two-photon states, whereas scaling the state complexity requires access to states composed of several (>2) photons and/or exhibiting high photon dimensionality. Here we show that the use of integrated frequency combs (on-chip light sources with a broad spectrum of evenly-spaced frequency modes) based on high-Q nonlinear microring resonators can provide solutions for such scalable complex quantum state sources. In particular, by using spontaneous four-wave mixing within the resonators, we demonstrate the generation of bi-and multi-photon entangled qubit states over a broad comb of channels spanning the S, C, and L telecommunications bands, and control these states coherently to perform quantum interference measurements and state tomography. Furthermore, we demonstrate the on-chip generation of entangled high-dimensional (quDit) states, where the photons are created in a coherent superposition of multiple pure frequency modes. Specifically, we confirm the realization of a quantum system with at least one hundred dimensions. Moreover, using off-the-shelf telecommunications components, we introduce a platform for the coherent manipulation and control of frequencyentangled quDit states. Our results suggest that microcavity-based entangled photon state generation and the coherent control of states using accessible telecommunications infrastructure introduce a powerful and scalable platform for quantum information science.

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High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip

Cited by 70 publications

References 32 publications

Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb

Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb

50-GHz-spaced comb of high-dimensional frequency-bin entangled photons from an on-chip silicon nitride microresonator

Integrated generation of complex optical quantum states and their coherent control

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