Time-resolved second-order autocorrelation function of parametric downconversion

• URL: http://arxiv.org/abs/2502.07691v1
• Date: Tue, 11 Feb 2025 16:44:52 GMT
• Title: Time-resolved second-order autocorrelation function of parametric downconversion
• Authors: D. B. Horoshko, S. Srivastava, F. Sośnicki, M. Mikołajczyk, M. Karpiński, B. Brecht, M. I. Kolobov,
• Abstract summary: We study a possibility of measuring the time-resolved second-order autocorrelation function of one of two beams generated in type-II parametricconversion. We show that such a measurement enables one to infer directly the degree of global coherence of that beam. Our theoretical model also shows that the magnified double-heralded autocorrelation function of one beam exhibits a local maximum around zero delay time.
• Score: 0.0
• License:
• Abstract: We study a possibility of measuring the time-resolved second-order autocorrelation function of one of two beams generated in type-II parametric downconversion by means of temporal magnification of this beam, bringing its correlation time from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors. We show that such a measurement enables one to infer directly the degree of global coherence of that beam, which is linked by a simple relation to the number of modes characterizing the entanglement between the two generated beams. We illustrate the proposed method by an example of photon pairs generated in a periodically poled KTP crystal with a symmetric group velocity matching for various durations of the pump pulse, resulting in different numbers of modes. Our theoretical model also shows that the magnified double-heralded autocorrelation function of one beam exhibits a local maximum around zero delay time, corresponding to photon bunching at a short time scale.

Related papers

• Measurement of ultrashort bi-photon correlation times with an integrated two-colour broadband SU(1,1)-interferometer [0.0]
  The bi-photon correlation time is a key performance identifier for many quantum spectroscopy applications. Here, we retrieve ultrashort bi-photon correlation times of around $100,mathrmfs$ by measuring simultaneously spectral and temporal interferograms.
  arXiv  Detail & Related papers  (2023-10-06T14:51:30Z)
• High-dimensional quantum correlation measurements with an adaptively gated hybrid single-photon camera [58.720142291102135]
  We propose an adaptively-gated hybrid intensified camera (HIC) that combines a high spatial resolution sensor and a high temporal resolution detector. With a spatial resolution of nearly 9 megapixels and nanosecond temporal resolution, this system allows for the realization of previously infeasible quantum optics experiments.
  arXiv  Detail & Related papers  (2023-05-25T16:59:27Z)
• Modeling the space-time correlation of pulsed twin beams [68.8204255655161]
  Entangled twin-beams generated by parametric down-conversion are among the favorite sources for imaging-oriented applications. We propose a semi-analytic model which aims to bridge the gap between time-consuming numerical simulations and the unrealistic plane-wave pump theory.
  arXiv  Detail & Related papers  (2023-01-18T11:29:49Z)
• Heisenberg treatment of multiphoton pulses in waveguide QED with time-delayed feedback [62.997667081978825]
  We propose a projection onto a complete set of states in the Hilbert space to decompose the multi-time correlations into single-time matrix elements. We consider the paradigmatic example of a two-level system that couples to a semi-infinite waveguide and interacts with quantum light pulses.
  arXiv  Detail & Related papers  (2021-11-04T12:29:25Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Auto-heterodyne characterization of narrow-band photon pairs [68.8204255655161]
  We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique is well suited to characterize pairs of photons, each of which can interact with a single atomic species.
  arXiv  Detail & Related papers  (2021-01-08T18:21:30Z)
• Spatiotemporal entanglement in a noncollinear optical parametric amplifier [0.0]
  We investigate the generation of two entangled beams of light in the process of single-pass type parametric conversion down with an ultra-short pulsed pump. We find the degenerate-temporal eigenmodes and the corresponding squeezing eigenvalues of the generated field both numerically and analytically.
  arXiv  Detail & Related papers  (2020-09-22T13:04:21Z)
• Observation of photon antibunching with a single conventional detector [7.315229390615172]
  We show a new method to measure and extract the second-order correlation function with a standard single-photon avalanche photodiode. This is realized by shifting the informative coincidence counts near the zero-time delay to a time window which is not obliterated by the dead-time and after-pulse of detection system. The new scheme is verified by measuring the second-order correlation from a single colloidal nanocrystal.
  arXiv  Detail & Related papers  (2020-08-28T14:12:33Z)
• Beyond coincidence: using all the data in Hong-Ou-Mandel interferometry [0.0]
  The Hong-Ou-Mandel effect provides a mechanism to determine the distinguishability of a photon pair by measuring the bunching rates of two photons interfering at a beam splitter. By modelling detectors with number and temporal resolution we demonstrate a greater precision than coincidence rates or temporal data alone afford.
  arXiv  Detail & Related papers  (2020-05-29T17:37:16Z)
• Observing coherences with time-resolved photoemission [77.34726150561087]
  We discuss the potential creation and measurement of coherences in both dispersive solids and qubit-like single levels using current generation time- and angle-resolved photoemission technology. We show that in both cases, when both the pump and the probe overlap energetically with the coherent levels, that the time-resolved photoemission signal shows a beating pattern at the energy difference between the levels. In the case of dispersive bands, this leads to momentum-dependent oscillations, which may be used to map out small energy scales in the band structure.
  arXiv  Detail & Related papers  (2020-05-18T18:00:02Z)
• Remotely projecting states of photonic temporal modes [0.0]
  We show remote spectral shaping of single photon states and probe the coherence properties of two-photon quantum correlations in the time-frequency domain. We control the temporal mode structure between the generated photon pairs and show remote state-projections over a range of time-frequency mode superpositions.
  arXiv  Detail & Related papers  (2020-04-22T22:38:46Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.