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Photon-level spatial mapping correlation measurement method based on single-photon imaging device

A space mapping, single-photon technology, applied in the field of quantum optics, can solve problems such as high resource consumption and inability to apply large-scale photonic chips for quantum correlation detection

Active Publication Date: 2020-05-05
SHANGHAI JIAODA INTELLECTUAL PORPERTY MANAGEMENT CO LTD
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Problems solved by technology

[0004] Aiming at the defect that the existing quantum correlation detection cannot be applied to large-scale photonic chips and consumes huge resources, the present invention proposes a photon-level spatial mapping correlation measurement method based on single-photon imaging devices

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  • Photon-level spatial mapping correlation measurement method based on single-photon imaging device

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Embodiment Construction

[0021] In this embodiment, the enhanced single-photon imaging device is used as the detection device. The enhanced single-photon imaging device is a device with a gain device, a gate width control, and an imaging screen, which can detect the position of each photon and display it on the screen.

[0022] Such as image 3 As shown, the specific steps of this embodiment include:

[0023] Step 1: Determine the target space. For example, polarization, frequency, wavelength, momentum, and angular momentum can all be expanded into the target space to be measured, and the quantum state of a single quantum can be expanded in various spaces, such as the energy, momentum, angular momentum, spin of electrons, and the quantum state of photons. Wavelength, frequency, polarization, etc. When it is necessary to measure the associated information of variables in these spaces, the space spanned by these variables can be set as the target space. Such as image 3 As shown, use {u 1 i} with {...

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Abstract

The invention provides a photon-level spatial mapping correlation measurement method based on a single photon imaging device. The quantum variables in the target space are converted into the positionvariables of photons by the detection device. The correlation of the target spatial variables is transformed into the correlation of the position spatial variables. Performing photographing frame by frame according to the time sequence by the detection device and performing division according to the time interval, and the temporal correlations events in the division are recorded in the correlationmatrix so as to construct the time-related correlation matrix. In the position space, the spatial correlation of the photons is obtained by using the detection device, and temporal correlation measurement and non-temporal correlation measurement of the target spatial variables are realized indirectly. The gate width time of the imaging system is set, the temporal correlation and non-temporal correlation information is measured and the continuity is recovered by using the Fourier filtering mode.

Description

technical field [0001] The present invention relates to a technology in the field of quantum optics, in particular to a photon-level spatial mapping correlation measurement (Correlation on Spatially-mapped Photon Level Imaging, COSPLI) method based on a single-photon imaging device. Background technique [0002] Quantum correlations and their measurement are crucial for exploring fundamental questions of quantum physics and developing quantum-enhanced technologies. Quantum correlations can be generated and manipulated in different spaces, which requires different methods to measure various quantum variables such as time, frequency and polarization in a targeted manner. Furthermore, early proofs of principle indicate that there is a great need today for the measurement of quantum correlations, especially in a sufficiently large Hilbert space for practical quantum applications. [0003] However, single-mode addressing is not economically feasible when the number of modes reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 金贤敏孙轲高俊曹明明刘煜
Owner SHANGHAI JIAODA INTELLECTUAL PORPERTY MANAGEMENT CO LTD
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