Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Olislager, Laurent; Mbodji, I.; Woodhead, Erik; Cussey, Johann; Furfaro, Luca; Emplit, Philippe; Massar, Serge; Huy, Kien Phan; Mérolla, Jean-Marc

doi:10.1088/1367-2630/14/4/043015

Cited by 28 publications

(43 citation statements)

References 28 publications

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“…The quantum optics experiment follows closely that reported in [28] (except for the frequency filters that are of the type used in [27]). In detail, a continuous-wave laser (from Sacher Lasertechnik) with wavelength λp = 2πc/ωp = 776.04 nm pumps a periodically-poled lithium niobate waveguide (from HC Photonics), thus generating frequency-entangled photons around wavelength λ 0 = 2πc/ω 0 = 1552.08 nm.…”

Section: Measurement Of Frequency-bin Entanglementmentioning

confidence: 65%

“…After subtraction of the background noise, large net visibilities are obtained, see table 1. As shown in [26][27][28], frequency-bin entanglement can be used to violate the Clauser-Horne Bell inequality, by a theoretical maximal value of S = 2.389. Measured visibilities should allow a violation of at least 2.2.…”

Section: Quantum Studymentioning

confidence: 99%

“…Manipulating energy-time entangled photons directly in the frequency domain allows robust transmission through telecommunication fibers, high-visibility two-photon interference and violation of Bell inequalities [26][27][28]. Here we present an analysis of interactions of frequency-bin entangled photons with different plasmophotonic nanostructures.…”

Section: Introductionmentioning

confidence: 99%

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Propagation and survival of frequency-bin entangled photons in metallic nanostructures

et al. 2015

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Abstract:We report on the design of two plasmonic nanostructures and the propagation of frequency-bin entangled photons through them. The experimental findings clearly show the robustness of frequency-bin entanglement, which survives after interactions with both a hybrid plasmo-photonic structure, and a nano-pillar array. These results confirm that quantum states can be encoded into the collective motion of a many-body electronic system without demolishing their quantum nature, and pave the way towards applications of plasmonic structures in quantum information.

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Section: Measurement Of Frequency-bin Entanglementmentioning

confidence: 65%

Section: Quantum Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Propagation and survival of frequency-bin entangled photons in metallic nanostructures

et al. 2015

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“…These include encodings based on energy time [6][7][8], time bins [9][10][11][12], orbital angular momentum [13][14][15], and frequency modes [16][17][18]. Thus, highly entangled states are now routinely created in all of these platforms.…”

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confidence: 99%

Quantifying Photonic High-Dimensional Entanglement

et al. 2017

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High-dimensional entanglement offers promising perspectives in quantum information science. In practice, however, the main challenge is to devise efficient methods to characterize high-dimensional entanglement, based on the available experimental data which is usually rather limited. Here we report the characterization and certification of high-dimensional entanglement in photon pairs, encoded in temporal modes. Building upon recently developed theoretical methods, we certify an entanglement of formation of 2.09(7) ebits in a time-bin implementation, and 4.1(1) ebits in an energy-time implementation. These results are based on very limited sets of local measurements, which illustrates the practical relevance of these methods.

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“…The nonclassical nature of the single-photon state, characterized by the heralded degree of second-order coherence g h (0), is also shown to remain unchanged by the frequency shear operation. Electro-optic phase modulation enables high-fidelity operations on both continuous-wave light at the single-photon level [25][26][27], and pulsed quantum light arXiv:1605.00640v2 [quant-ph] …”

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confidence: 99%

Spectral Shearing of Quantum Light Pulses by Electro-Optic Phase Modulation

et al. 2017

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Frequency conversion of nonclassical light enables robust encoding of quantum information based upon spectral multiplexing that is particularly well-suited to integrated-optics platforms. Here we present an intrinsically deterministic linear-optics approach to spectral shearing of quantum light pulses and show it preserves the wavepacket coherence and quantum nature of light. The technique is based upon an electro-optic Doppler shift to implement frequency shear of heralded single-photon wave packets by ±200 GHz, which can be scaled to an arbitrary shift. These results demonstrate a reconfigurable method to controlling the spectral-temporal mode structure of quantum light that could achieve unitary operation.The frequency of a single light quantum, or photon, is a key physical property of individual excitations of the quantized electromagnetic field [1], which were introduced to describe the photoelectric effect [2]. Frequency is a mode characteristic, just as polarization, transverse-spatial amplitude, and direction of propagation define the modes of electromagnetic radiation. Thus frequency can be transformed using linear-optical elements in much the same way lenses transform transverse-spatial modes and wave plates manipulate polarization modes. Frequency is not an immutable property of photons-it can be coherently and deterministically modified. For example, retroreflection from a moving mirror results in a frequency shift due to the Doppler effect [3,4]. The various independent degrees of freedom that comprise the modes of light can be used to encode information in the electromagnetic field, namely position-momentum, time-frequency, and polarization. Information-technology applications require precise means for manipulation and measurement of light in the encoding degree of freedom. Many preliminary demonstrations of quantum optical technologies have utilized polarization, path or transverse-spatial mode encoding. These degrees of freedom are limited to relatively few quantum bits that can be practically addressed per photon within an integrated-optics platform, in which high-stability, low-loss multiphoton interference, necessary for optical quantum technologies, can occur. Recently, the time-frequency (TF) mode structure of light has come to the fore in quantum photonics as an ideal means of quantum information encoding for integrated optical quantum technologies [5][6][7][8][9][10][11].Essential to both quantum and classical technologies based upon TF mode encoding is the ability to control the pulsemode structure of light-where the central frequency and arrival time play prominent roles. In the classical domain the primary methods to control an optical pulse are based upon direct modification of the wave packet by amplifying and filtering different frequency and time components [12,13]. This approach to pulse shaping is incompatible with quantum states of light owing to noise and signal degradation arising from amplification and loss, resulting in destruction of the fragile quantum coherences between di...

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Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Cited by 28 publications

References 28 publications

Propagation and survival of frequency-bin entangled photons in metallic nanostructures

Propagation and survival of frequency-bin entangled photons in metallic nanostructures

Quantifying Photonic High-Dimensional Entanglement

Spectral Shearing of Quantum Light Pulses by Electro-Optic Phase Modulation

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