Quantum enhancement in time-delays estimation through spectrally resolved two-photon interference

Triggiani, Danilo; Psaroudis, Giorgos; Tamma, Vincenzo

doi:10.48550/arxiv.2112.12102

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…𝐴 denotes the quantum-mechanical probability amplitude for the coincidence detection event and can be obtained from the Fourier transform of the TPSA at the coordinates marked in Eq. (10). It can be seen from Eq.…”

Section: Spectrally Resolved Two-photon Interference In a Modified Ho...mentioning

confidence: 91%

“…In a two-photon interference experiment, the measurements were generally performed in the time domain where the spectral information of the involved photons was integrated and lost during the measurement. With the development of high-resolved spectral technology at singlephoton level, more rich phenomenons can be found in spectrally resolved two-photon [5][6][7][8][9][10], three-photon [11] or four-photon interferences [12]. This allows us to observe useful spectral information with high visibility that cannot be extracted from the time domain, especially when the visibility of time-domain interference is very low or zero [9].…”

Section: Introductionmentioning

confidence: 99%

“…Another advantage of this technology is that the time-domain interferogram, which would have been obtained through a standard delay-scanning with long acquisition times, can be recovered fast from the spectrally resolved two-photon interference [7]. Moreover, spectrally resolved interference can also provide a quantum enhancement on the measurement precision, for example in time-delays estimation [10], and has a higher Fisher information than non-spectrally resolved results [9,10]. However, spectrally resolved two-photon interference for the modified HOM interferometer has not yet been explored, to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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Spectrally resolved two-photon interference in a modified Hong-Ou-Mandel interferometer

Li¹,

Zhai²,

Xi³

et al. 2022

Preprint

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A modified Hong-Ou-Mandel(HOM) interference reveals that the two-photon interference phenomenon can be explained only by the concept of a two-photon wave packet rather than the single-photon one. Previously, the measurements for this interference were usually performed in the time domain where the spectral information of the involved photons was integrated and lost during the measurement. Here, we theoretically explore the spectrally resolved two-photon interference for the modified HOM interferometer both in the cases of CW pump and pulse pump. It is found that, in the CW-pumped case, we can obtain a 2D spectrally resolved interferogram at different phases, from which a 1D temporal interferogram can be directly recovered without a standard delay-scanning. In the pulse-pumped case, the joint spectral intensity is phase-dependent and can be modulated by the time delay along the directions of both frequency sum and frequency difference between signal and idler photons, which may provide a versatile way to generate high-dimensional frequency entanglement and engineer high-dimensional quantum states. These results not only show more rich spectral information that cannot be extracted from the time domain, but also shed new light on a comprehensive understanding of the two-photon interference phenomenon in the frequency domain.

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Section: Spectrally Resolved Two-photon Interference In a Modified Ho...mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectrally resolved two-photon interference in a modified Hong-Ou-Mandel interferometer

Li¹,

Zhai²,

Xi³

et al. 2022

Preprint

View full text Add to dashboard Cite

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Two-dimensional control of a biphoton joint spectrum

Shukhin,

Hurvitz,

Trajtenberg-Mills

et al. 2024

Opt. Express

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Control over the joint spectral amplitude of a photon pair has proved highly desirable for many quantum applications, since it contains the spectral quantum correlations, and has crucial effects on the indistinguishability of photons, as well as promising emerging applications involving complex quantum functions and frequency encoding of qudits. Until today, this has been achieved by engineering a single degree of freedom, either by custom poling nonlinear crystal or by shaping the pump pulse. We present a combined approach where two degrees of freedom, the phase-matching function, and the pump spectrum, are controlled. This approach enables the two-dimensional control of the joint spectral amplitude, generating a variety of spectrally encoded quantum states - including frequency uncorrelated states, frequency-bin Bell states, and biphoton qudit states. In addition, the joint spectral amplitude is controlled by photon bunching and anti-bunching, reflecting the symmetry of the phase-matching function.

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Quantum enhancement in time-delays estimation through spectrally resolved two-photon interference

Abstract: The quantum interference occurring between two indistinguishable photons impinging on the two input faces of a beam-splitter can be exploited for a range of applications, from quantum optical coherence to-*

Cited by 2 publications

References 26 publications

Spectrally resolved two-photon interference in a modified Hong-Ou-Mandel interferometer

Spectrally resolved two-photon interference in a modified Hong-Ou-Mandel interferometer

Two-dimensional control of a biphoton joint spectrum

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