CN102254474A - Small quantum entangled source teaching system - Google Patents
Small quantum entangled source teaching system Download PDFInfo
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- CN102254474A CN102254474A CN2011101701772A CN201110170177A CN102254474A CN 102254474 A CN102254474 A CN 102254474A CN 2011101701772 A CN2011101701772 A CN 2011101701772A CN 201110170177 A CN201110170177 A CN 201110170177A CN 102254474 A CN102254474 A CN 102254474A
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Abstract
The invention relates to a small quantum entangled source teaching system which comprises a laser, wherein the laser emitting side of the laser is provided with a focusing device; the emergent side of the focusing device is provided with a first reflecting device; the first reflecting device is positioned between the focusing device and an entangled device; the emergent side of the entangled device is provided with a compensating device; a second reflecting device is positioned between the entangled device and the compensating device; the emergent side of the compensating device is provided with a collecting device; and a measuring device is positioned between the compensating device and the collecting device. The invention can lead students to finish a quantum entangled generation process personally through debugging an experiment light path, visually view the basic properties of quantum mechanics through measuring a polarized relevant curve, and finish the inspection test of Bell inequation, thereby directly inspecting the quantum mechanic basic principle. The small quantum entangled source teaching system has a simple structure, can integrate all devices on one platform and is convenient for carrying and using.
Description
Technical field
The present invention relates to tutoring system, especially a kind of small-sized quantum entanglement source tutoring system.
Background technology
Quantum-mechanical ultimate principle is different fully with classical theory, and a lot of ideas are run counter to classical intuition, particularly wherein tangle character, allow the people unimaginably queer especially.Be difficult to find suitable example to verify quantum-mechanical impression from life, quantum nature only may just can obtain embodying in the quantized system under the micro-scale.Quantum entanglement is as character very marvellous in the Nature, and it can between the middle even space without any the medium that can propagate or thoroughly shielding association take place so that two very far away apart.
In order to save classical idea, the realism that has been born attempts to explain existing all quantum appearances.On problems, local realism and quantum mechanics all are of equal value.Yet, the appearance of Bell inequality, given a check local realism and quantum mechanics who to the method for who mistake.In order to allow the student deeply understand quantum-mechanical ultimate principle and character, be necessary to research and develop a cover and be convenient for carrying, the convenient use, the convenient incorporate small-sized origin system that tangles of regulating parameter.
Summary of the invention
The object of the present invention is to provide a kind of carrying and small-sized quantum entanglement source tutoring system easy to use, that be convenient to regulate parameter.
For achieving the above object, the present invention has adopted following technical scheme: a kind of small-sized quantum entanglement source tutoring system, comprise laser instrument, the side that laser instrument sends laser is provided with focalizer, the bright dipping side of focalizer is provided with first reflection unit, first reflection unit is at focalizer and tangle between the device, the bright dipping side of tangling device is provided with compensation system, second reflection unit is tangling between device and the compensation system, the bright dipping side of compensation system is provided with gathering-device, and measurement mechanism is between compensation system and gathering-device.
As shown from the above technical solution, the present invention can allow the student take action on one's own by the debugging to the experiment light path, finish the process that quantum entanglement produces, and see quantum-mechanical fundamental property intuitively by measuring the polarization correlation curve, and can finish the check experiment of Bell inequality, thereby Direct Test quantum mechanics ultimate principle.Of the present invention simple in structure, all devices can be integrated on the platform, and are easy to carry and use.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Embodiment
A kind of small-sized quantum entanglement source tutoring system, comprise laser instrument 1, the side that laser instrument 1 sends laser is provided with focalizer, the bright dipping side of focalizer is provided with first reflection unit, first reflection unit is at focalizer and tangle between the device, the bright dipping side of tangling device is provided with compensation system, second reflection unit is tangling between device and the compensation system, the bright dipping side of compensation system is provided with gathering-device, measurement mechanism is between compensation system and gathering-device, described gathering-device links to each other with single-photon detector by optical fiber 16, as shown in Figure 1.
As shown in Figure 1, described laser instrument 1, focalizer, first reflection unit, tangle that device, second reflection unit, compensation system, measurement mechanism and gathering-device are integrated to be installed on the experiment porch, volume is little, is easy to carry.Compensation system is used to tangle compensation, improves and tangles performance; Measurement mechanism is used for detection and tangles character, is collected by gathering-device again.
As shown in Figure 1, described focalizer is lens 2, the purple light that pump light source---laser instrument 1 sends, focus on through lens 2, described first reflection unit is made up of first and second purple light catoptron 3,4 that is used to change optical path direction, the first purple light catoptron 3 is+the miter angle layout, the second purple light catoptron 4 be positioned at the first purple light catoptron 3 under and be-miter angle arranges, the described device that tangles adopts nonlinear crystal BBO 5, and nonlinear crystal BBO 5 realizes producing the suitable focused beam that tangles high-level efficiency, high collection efficiency in the distance of 30cm.
Described second reflection unit is made up of first, second, third and fourth ir reflector 6,7,8,9 that is used to change optical path direction, be used to receive the first via that nonlinear crystal BBO 5 sends tangle first ir reflector 6 of light and be-miter angle arranges, second ir reflector 7 be positioned at first ir reflector 6 under and be+miter angle arranges, be used to receive the second tunnel the 3rd ir reflector 8 that tangles light that nonlinear crystal BBO 5 sends be+miter angle arranges, quatre external mirror 9 be positioned at the 3rd ir reflector 8 directly over and be-miter angle arranges.Light is tangled on described first and second road, through two infrared band catoptrons, realizes the collection of tangling the light word to the single photon level in the space long at 30cm, that 10cm is wide.The non-light that tangles that nonlinear crystal BBO 5 sends is to light dust basket 17.
Described compensation system is made up of first and second compensation system 10,11, described measurement mechanism is made up of first and second measurement mechanism 12,13, described gathering-device is made up of first and second gathering- device 14,15, first compensation system 10 is between second ir reflector 7 and first measurement mechanism 12, first measurement mechanism 12 is between first compensation system 10 and first gathering-device 14, second compensation system 11 is between the quatre external mirror 9 and second measurement mechanism 13, and second measurement mechanism 13 is between second compensation system 11 and second gathering-device 15.
As shown in Figure 1, described first and second compensation system 10,11 is formed by half-wave plate and compensating non-linear crystal BBO, and the thickness of compensating non-linear crystal BBO is half of nonlinear crystal BBO 5 thickness; Described first and second measurement mechanism 12,13 is formed by half-wave plate and beam splitter.Described laser instrument 1, lens 2 and the first purple light catoptron 3 are positioned on the same central horizontal axis, the second purple light catoptron 4 is positioned on the same central horizontal axis with nonlinear crystal BBO 5, described second ir reflector 7, first compensation system 10, first measurement mechanism 12, first gathering-device 14 are positioned on the same central horizontal axis, and quatre external mirror 9, second compensation system 11, second measurement mechanism 13, second gathering-device 15 are positioned on the same central horizontal axis.
The present invention allows experiment light path parameter debugged, and can utilize supporting software to show original experimental data and experimental result, can help the student to deepen understanding to quantum-mechanical ultimate principle.As the quantized system on a basis, this device can be used for a lot of follow-up quantum optics experiments, interferes such as single photon, and the Shuangzi interference experiment has good teaching demonstration.
Claims (6)
1. small-sized quantum entanglement source tutoring system, it is characterized in that: comprise laser instrument (1), the side that laser instrument (1) sends laser is provided with focalizer, the bright dipping side of focalizer is provided with first reflection unit, first reflection unit is at focalizer and tangle between the device, the bright dipping side of tangling device is provided with compensation system, second reflection unit is tangling between device and the compensation system, the bright dipping side of compensation system is provided with gathering-device, and measurement mechanism is between compensation system and gathering-device.
2. small-sized quantum entanglement according to claim 1 source tutoring system is characterized in that: described gathering-device links to each other with single-photon detector by optical fiber (16).
3. small-sized quantum entanglement according to claim 1 source tutoring system is characterized in that: described laser instrument (1), focalizer, first reflection unit, tangle that device, second reflection unit, compensation system, measurement mechanism and gathering-device are integrated to be installed on the experiment porch.
4. small-sized quantum entanglement according to claim 1 source tutoring system, it is characterized in that: described focalizer is lens (2), described first reflection unit is by first, two purple light catoptrons (3,4) form, the first purple light catoptron (3) is+the miter angle layout, the second purple light catoptron (4) be positioned at the first purple light catoptron (3) under and be-miter angle arranges, the described device that tangles adopts nonlinear crystal BBO(5), described second reflection unit is by first, two, three, quatre external mirror (6,7,8,9) form, being used to receive nonlinear crystal BBO(5) first via sent first ir reflector (6) that tangles light is-and miter angle arranges, second ir reflector (7) be positioned at first ir reflector (6) under and be+miter angle arranges, being used to receive nonlinear crystal BBO(5) the second tunnel the 3rd ir reflector (8) that tangles light that sends is+and miter angle arranges, quatre external mirror (9) be positioned at the 3rd ir reflector (8) directly over and be-miter angle arranges, described compensation system is by first, two compensation systems (10,11) form, described measurement mechanism is by first, two measurement mechanisms (12,13) form, described gathering-device is by first, two gathering-devices (14,15) form, first compensation system (10) is positioned between second ir reflector (7) and first measurement mechanism (12), first measurement mechanism (12) is positioned between first compensation system (10) and first gathering-device (14), second compensation system (11) is positioned between quatre external mirror (9) and second measurement mechanism (13), and second measurement mechanism (13) is positioned between second compensation system (11) and second gathering-device (15).
5. small-sized quantum entanglement according to claim 4 source tutoring system, it is characterized in that: described first and second compensation system (10,11) is formed by half-wave plate and compensating non-linear crystal BBO, and the thickness of compensating non-linear crystal BBO is nonlinear crystal BBO(5) half of thickness; Described first and second measurement mechanism (12,13) is formed by half-wave plate and beam splitter.
6. small-sized quantum entanglement according to claim 4 source tutoring system, it is characterized in that: described laser instrument (1), the lens (2) and the first purple light catoptron (3) are positioned on the same central horizontal axis, the second purple light catoptron (4) and nonlinear crystal BBO(5) be positioned on the same central horizontal axis, described second ir reflector (7), first compensation system (10), first measurement mechanism (12), first gathering-device (14) is positioned on the same central horizontal axis, quatre external mirror (9), second compensation system (11), second measurement mechanism (13), second gathering-device (15) is positioned on the same central horizontal axis.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898288A (en) * | 2015-06-02 | 2015-09-09 | 清华大学 | Compact semiconductor laser apparatus and two-photon polarization entangled source generation system |
| CN107392322A (en) * | 2017-09-13 | 2017-11-24 | 刘东升 | A kind of quantum entanglement pipe |
| CN110428710A (en) * | 2019-07-30 | 2019-11-08 | 安徽问天量子科技股份有限公司 | A kind of dummy emulation method of quantum entangled source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101398590A (en) * | 2008-11-06 | 2009-04-01 | 天津大学 | All-optical frequency entangled photon source |
| CN202126780U (en) * | 2011-06-23 | 2012-01-25 | 安徽量子通信技术有限公司 | Miniature quantum entanglement source teaching system |
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- 2011-06-23 CN CN2011101701772A patent/CN102254474A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398590A (en) * | 2008-11-06 | 2009-04-01 | 天津大学 | All-optical frequency entangled photon source |
| CN202126780U (en) * | 2011-06-23 | 2012-01-25 | 安徽量子通信技术有限公司 | Miniature quantum entanglement source teaching system |
Non-Patent Citations (2)
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| 孙文博 等: "《用光子纠缠源验证BELL不等式》", 《物理实验》 * |
| 王合英 等: "《光量子纠缠态的制备和测量实验》", 《物理实验》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898288A (en) * | 2015-06-02 | 2015-09-09 | 清华大学 | Compact semiconductor laser apparatus and two-photon polarization entangled source generation system |
| CN104898288B (en) * | 2015-06-02 | 2017-04-12 | 清华大学 | Compact semiconductor laser apparatus and two-photon polarization entangled source generation system |
| CN107392322A (en) * | 2017-09-13 | 2017-11-24 | 刘东升 | A kind of quantum entanglement pipe |
| CN107392322B (en) * | 2017-09-13 | 2020-10-02 | 刘东升 | Quantum entanglement tube |
| CN110428710A (en) * | 2019-07-30 | 2019-11-08 | 安徽问天量子科技股份有限公司 | A kind of dummy emulation method of quantum entangled source |
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Application publication date: 20111123 |