Quantum optical synthesis in 2D time–frequency space

Jin, Rui; Tazawa, Kurumi; Asamura, Naoto; Yabuno, Masahiro; Miki, Shigehito; China, Fumihiro; Terai, Hirotaka; Minoshima, Kaoru; Shimizu, Ryosuke

doi:10.1063/5.0059895

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…Therefore, the convergence shows the feasibility of our work, meanwhile, it shows that PSO is a versatile tool in the crystal structure design. In addition, we believe our method can be utilized for designing special non-linear crystals to generate exotic quantum states for quantum sensing and metrology [33,45,48,56]. We note that other optimization algorithms, such as simulated annealing or genetic algorithms, are also suitable for this kind of optimization problem.…”

Section: Discussionmentioning

confidence: 99%

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Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Cai,

Tian,

Wang

et al. 2022

Preprint

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Quantum light sources in the mid-infrared (MIR) band play an important role in many applications, such as quantum sensing, quantum imaging, and quantum communication. However, there is still a lack of high-quality quantum light sources in the MIR band, such as the spectrally pure single-photon source. In this work, we present the generation of spectrally-pure state in an optimized poled lithium niobate crystal using a metaheuristic algorithm. In particular, we adopt the particle swarm optimization algorithm to optimize the duty cycle of the poling period of the lithium niobate crystal. With our approach, the spectral purity can be improved from 0.820 to 0.998 under the third group-velocity-matched condition, and the wavelength-tunable range is from 3.0 µm to 4.0 µm for the degenerate case and 3.0 µm to 3.7 µm for the nondegenerate case. Our work paves the way for developing quantum photonic technologies at the MIR wavelength band.

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Section: Discussionmentioning

confidence: 99%

“…As shown in Fig. 1(a), the single photons generated from the standard PPLN crystal have a rectangular shape in the time domain and sinc shape in the frequency domain [32,33]. The side lobes in the sinc profile degraded the purity.…”

Section: Introductionmentioning

confidence: 99%

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Cai,

Tian,

Wang

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, we believe our method can be utilized for designing special nonlinear crystals to generate exotic quantum states for quantum sensing and metrology. [ 33,45 ] [ 48,56 ]…”

Section: Discussionmentioning

confidence: 99%

“…[ 15 ] As shown in Figure a, the single photons generated from the standard PPLN crystal have a rectangular shape in the time domain and sinc shape in the frequency domain. [ 32,33 ] The side lobes in the sinc profile degraded the purity. In order to improve the purity, the poling period can be designed so that the biphotons have a Gaussian profile in both time and frequency domains.…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of the Lithium Niobate for Spectrally‐Pure‐State Generation at MIR Wavelengths Using Metaheuristic Algorithm

et al. 2022

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Quantum light sources in the mid‐infrared (MIR) band play an important role in many applications, such as quantum sensing, quantum imaging, and quantum communication. However, there is still a lack of high‐quality quantum light sources in the MIR band, such as the spectrally pure single‐photon source. In this work, the generation of a spectrally‐pure state in an optimized poled lithium niobate crystal using a metaheuristic algorithm is presented. In particular, the particle swarm optimization algorithm is adopted to optimize the duty cycle of the poling period of the lithium niobate crystal. With this approach, the spectral purity can be improved from 0.820 to 0.998 under the third group‐velocity‐matched condition, and the wavelength‐tunable range from 3.0 to 4.0 µm for the degenerate case and 3.0 to 3.7 µm for the nondegenerate case. This work paves the way for developing quantum photonic technologies at the MIR wavelength band.

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“…The domain engineering technique used here could be combined with other methods of shaping the joint spectrum such as pump shaping to produce time-frequency grid states [31] or using time-frequency synthesis techniques [32] to double the number of spectral features produced from domain engineering. An open question for future work is if domain engineering can be used to generate biphotons in hybrid encodings (see Fig.…”

mentioning

confidence: 99%

Frequency-bin entanglement from domain-engineered down-conversion

Morrison,

Graffitti,

Barrow

et al. 2022

Preprint

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Frequency encoding is quickly becoming an attractive prospect for quantum information protocols owing to larger Hilbert spaces and increased resilience to noise compared to other photonic degrees of freedom. To fully make use of frequency encoding as a practical paradigm for QIP, an efficient and simple source of frequency entanglement is required. Here we present a single-pass source of discrete frequency-bin entanglement which does not use filtering or a resonant cavity. We use a domain-engineered nonlinear crystal to generate an eight-mode frequency-bin entangled source at telecommunication wavelengths. Our approach leverages the high heralding efficient and simplicity associated with bulk crystal sources.

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Quantum optical synthesis in 2D time–frequency space

Cited by 13 publications

References 35 publications

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Optimized Design of the Lithium Niobate for Spectrally‐Pure‐State Generation at MIR Wavelengths Using Metaheuristic Algorithm

Frequency-bin entanglement from domain-engineered down-conversion

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