Photon entanglement quantum switching system based on Rydberg blockage effect
A switching system and blocking effect technology, applied in the field of quantum information, can solve problems such as single-photon blocking, and achieve the effect of increasing the principal quantum number and enhancing the interaction
Pending Publication Date: 2019-08-23
UNIV OF SCI & TECH OF CHINA
View PDF0 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
These experiments have achieved the blocking of weakly coherent light, but they cannot block single photons
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] Most of the existing technologies realize the blocking of weakly coherent light, but not the blocking of single photons. In view of this, the present invention provides a photon entanglement quantum switch system based on the Rydberg blocking effect to realize the control of single photon Quantum switch, the photon entanglement quantum switch system based on the Rydberg blocking effect, includes an entangled photon generation unit and an entangled photon switch unit, wherein:
[0038] The entangled photon generating unit is used to generate entangled photon pairs, wherein a beam of entangled photons is used as a detection signal of the entangled photon switch unit; and
[0039] The entangled photon switch unit includes:
[0040] A three-dimensional magneto-optical trap in which a three-dimensional atomic ensemble is trapped;
[0041] A dichroic mirror, which is used to reflect the externally input coupling light on the three-dimensional magneto-optical trap, and cooper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a photon entanglement quantum switching system based on a Rydberg blockage effect. The system comprises an entangled photon generation unit and an entangled photon switching unit, wherein the entangled photon generation unit is used for generating an entangled photon pair, and one entangled photon in the entangled photon pair serves as a detection signal of the entangled photon switching unit; and the entangled photon switching unit comprises a three-dimensional magneto-optical trap, a dichroscope and a polarization beam splitter, wherein the three-dimensional magneto-optical trap provides a three-dimensional atomic ensemble; the dichroscope is used for reflecting externally-input coupling light onto the three-dimensional magneto-optical trap and cooperating with the detection signal to realize transparent electromagnetic induction; and the polarization beam splitter is used for coupling switching control light of externally-input coherent pulses to the three-dimensional magneto-optical trap to realize photon switching control. According to the system, by adjusting the collimation and focusing of the coupling light and the switching control light and increasing the principal quantum number in a Rydberg atom highly-excited state (|nD>) in the three-dimensional atomic ensemble, switching with the switching contrast ratio exceeding 50% is realized, and thesystem plays and important role in construction of a quantum network.
Description
technical field [0001] The invention belongs to the field of quantum information, in particular to a photon entanglement quantum switch system based on the Rydberg blocking effect. Background technique [0002] With the development of quantum information technology in recent years, the research on quantum communication and quantum computing continues to advance, and the important goal of future development is the realization of quantum network. Single-photon switches are a fundamental building block required for quantum networks. Rydberg atoms have an impressive long-range Rydberg interaction, which endows the medium with great nonlinear properties, and the resulting even-order blocking effect can be used to make single-photon quantum switches, which is very important for the construction of quantum networks. Very important. Realizing the task of controlling the entire entangled system with a single quantum particle is a milestone and long-term goal of quantum information ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G02F1/35G21K1/00
CPCG02F1/3517G02F1/353G02F1/3536G21K1/006
Inventor 丁冬生张力华史保森
Owner UNIV OF SCI & TECH OF CHINA