CN107871519A - The storage device of Entangled State photon, tangle condition checkout gear and method - Google Patents
The storage device of Entangled State photon, tangle condition checkout gear and method Download PDFInfo
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- CN107871519A CN107871519A CN201711097683.7A CN201711097683A CN107871519A CN 107871519 A CN107871519 A CN 107871519A CN 201711097683 A CN201711097683 A CN 201711097683A CN 107871519 A CN107871519 A CN 107871519A
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- 238000000034 method Methods 0.000 title abstract description 13
- 239000013307 optical fiber Substances 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
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- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The present invention relates to the storage device of Entangled State photon, tangle condition checkout gear and method, the device includes annular fiber, the annular fiber overhangs one section to ring and is used as photon input, photon is with critical angle after photon input is incided in inner layer optical fiber, with total reflection mode in inner layer optical fiber shuttling movement, realize the storage to Entangled State photon.Local photon in Entangled State two-photon signal is incided in inner layer optical fiber with critical angle from photon input, local photon shuttling movement in inner layer optical fiber with total reflection mode；Detection photon in Entangled State two-photon signal runs into the change of target generating state, cause the state change of local photon, the change of local photon fortune state is finally detected, so that it is determined that target so as to be spilled over to outer layer optical fiber from internal memory optical fiber after the output of photon output end by single photon detector.
Description
Technical field
The present invention relates to the detection of Entangled State photon, in particular to a kind of storage device of Entangled State photon, tangles state
Detection means and method.
Background technology
At present, in the detection of Entangled State photon, the status information of tangling of Entangled State photon, while side again such as why not are destroyed
Just detect, be the biggest obstacle that Entangled State photon is applied to quantum information technology field.Letter is tangled between Entangled State photon
Breath is applied to target acquisition, but because its original state can not measure in advance, so as to can not locally be entangled by direct measurement
The method for twining particle state, target information is obtained, that is, be used for the change for detecting the state of the Entangled State particle of target, it is impossible to pass through
Direct measurement is locally tangled the change of particle state and known.
The content of the invention
Present invention aims to overcome that above-mentioned the deficiencies in the prior art and a kind of storage device of Entangled State photon is provided, entangled
Condition checkout gear and method are twined, measurement (reception) echo can not had to and obtain target information and be imaged, so as to be answered
For in quantum radar.
It is a kind of Entangled State photon memory to realize the technical solution adopted by the present invention, and the device includes rectangular ring light
Fibre, the rectangular ring optical fiber overhang one section to ring and are used as photon input, and photon is entered with critical angle from photon input
After being mapped to ring, with total reflection mode in ring shuttling movement, realize the storage to Entangled State photon.
In the above-mentioned technical solutions, the photon input is located at the right angle of the rectangular ring optical fiber.
What the present invention also provided a kind of Entangled State photon tangles condition checkout gear, the detection means include inner layer optical fiber and
Outer layer optical fiber, outer layer optical fiber are wrapped in outside the inner layer optical fiber；
The inner layer optical fiber overhangs one section to ring and is used as photon input, and the outer layer optical fiber overhangs one section of work to ring
For photon output end, photon output end is provided with single photon detector；
Local photon in Entangled State two-photon signal with critical angle after photon input is incided in inner layer optical fiber,
With total reflection mode in inner layer optical fiber shuttling movement；Detection photon in Entangled State two-photon signal runs into target generating state
Change, cause the state change of local photon, the change of local photon states makes local photon be spilled over to outer layer from inner layer optical fiber
Optical fiber, finally detected after the output of photon output end by single photon detector, so that it is determined that target.
In the above-mentioned technical solutions, the photon input of the inner layer optical fiber is located at the right angle of rectangle；The outer light
Fine photon output end is located at the right angle of rectangle, and outer layer optical fiber is wrapped in outside the inner layer optical fiber and also forms rectangular ring.
In addition, the present invention also provides and a kind of tangles state-detection side by what above-mentioned detection device realized Entangled State photon
Method, this method include：
Local photon in Entangled State two-photon signal is incided in inner layer optical fiber with critical angle from photon input, this
Ground photon shuttling movement in inner layer optical fiber with total reflection mode；
Detection photon in Entangled State two-photon signal runs into the change of target generating state, causes the state of local photon to change
Become, the change of local photon fortune state from internal memory optical fiber so that be spilled over to outer layer optical fiber, finally from quilt after the output of photon output end
Single photon detector detects, so that it is determined that target.
The present invention has advantages below：
First, Entangled State photon is stored in optical fiber from ring (rectangular ring optical fiber), tangling between measurement Entangled State photon
State change need not determine its original state, so as to accomplish not interferometry；
2nd, the invention provides a kind of Entangled State photon storage method；
3rd, the invention provides a kind of quantum entanglement information storage method；
4th, the invention provides a kind of method for recognizing the change of Entangled State photon states；
5th, the present invention is used for quantum radar, can be achieved not measuring the quantum radar of echo.
Brief description of the drawings
Fig. 1 is the structural representation of the storage device of Entangled State photon of the present invention.
Fig. 2 is the operation principle schematic diagram of the storage device of Entangled State photon of the present invention.
Fig. 3 is the schematic diagram for tangling state-detection process of Entangled State photon.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Entangled State photon memory of the present invention includes rectangular ring optical fiber, and the rectangular ring optical fiber overhangs one to ring
Duan Zuowei photon inputs, photon input are located at the right angle of the rectangular ring optical fiber.Photon is with critical angle from photon
After input incides ring, with total reflection mode in ring shuttling movement, realize the storage to Entangled State photon.
The structure for tangling condition checkout gear of Entangled State photon of the present invention based on above-mentioned Entangled State photon memory,
As shown in figure 1, including inner layer optical fiber and outer layer optical fiber, outer layer optical fiber is wrapped in outside the inner layer optical fiber, and inner layer optical fiber is to outside ring
Stretch out one section and be used as photon input, photon input is located at the right angle of rectangle, and outer layer optical fiber overhangs one section of conduct to ring
Photon output end, photon output end are located at the right angle of rectangle, and photon output end is provided with single photon detector.Because straight-flanked ring exists
Its corner has geometric buckling mutation, therefore, outer layer optical fiber can be spilled over to for the photon more than the optical fiber cirtical angle of total reflection
In.
LASER Light Source used in the present embodiment requires strong coherence, for example with infrared light (1.5 μm or 0.85 μm etc.).
EPR sources used are used to two-photon or multi-photon signal being changed into two-photon entanglement or multi-photon tangles signal, will
One of this entangled photons signal is along critical angle of incidence incident optical from ring；Another Entangled State photon is modulated, changes its shape
State, so as to influence optical fiber from the Entangled State photon states in ring.
The operation principle of the storage device of Entangled State photon is as shown in Fig. 2 inner layer optical fiber and outer layer optical fiber are formed by optical fiber
One closed-loop, its performance are determined by input port and output port completely.Photon faces from optical fiber from ring input port along optical fiber
After boundary's incident angle input, due to meeting geometry designs condition, photon carries out shuttling movement in ring；When Entangled State photon in ring
When being caused its state change by the sensing of Entangled State photon outside ring, then it will be spilled over to optical fiber from ring outer layer optical fiber,
Then exported in output port to single photon detector.
Single photon detector used in the present embodiment is not limited to the single photon detector of a certain special nature.It is required that efficiency will height
(more than 80%), dark counting low (10-3Below/the second), peak count rate will height (more than 2G/s).
As shown in figure 3, comprised the following steps using the invention described above optical fiber from ring：
S100, EPR source produce and tangle two-photon pair；
S200, tangle two-photon to one of with optical fiber critical angle of incidence input optical fibre from ring (the i.e. storage of Entangled State photon
Device) in；
State change known to S300, optical fiber from another entangled photons progress outside ring；
S400, single photon detector detection fiber overflow photon signal from ring；
The innovation of the present invention is that Entangled State photon is stored in into optical fiber from ring, and can be between direct measurement entangled photons
Tangle information.The present invention is used for the detection to target, and the quantum radar of accident echo can be achieved.The present invention and following storage
A kind of method of quantum information.
Claims (5)
- A kind of 1. storage device of Entangled State photon, it is characterised in that：Including rectangular ring optical fiber, the rectangular ring optical fiber to Ring overhang one section be used as photon input, photon with critical angle after photon input incides ring, with total reflection mode The shuttling movement in ring, realize the storage to Entangled State photon.
- 2. the storage device of Entangled State photon according to claim 1, it is characterised in that：The photon input is located at institute State the right angle of rectangular ring optical fiber.
- 3. a kind of Entangled State photon tangles condition checkout gear, it is characterised in that：Including inner layer optical fiber and outer layer optical fiber, outer layer Optical fiber is wrapped in outside the inner layer optical fiber；The inner layer optical fiber overhangs one section to ring and is used as photon input, and the outer layer optical fiber overhangs one section to ring and is used as light Sub- output end, photon output end are provided with single photon detector；Local photon in Entangled State two-photon signal with critical angle after photon input is incided in inner layer optical fiber, with complete Reflection mode shuttling movement in inner layer optical fiber；Detection photon in Entangled State two-photon signal runs into target generating state and changed Become, cause the state change of local photon, the change of local photon states makes local photon be spilled over to outer light from inner layer optical fiber Fibre, finally detected after the output of photon output end by single photon detector, so that it is determined that target.
- 4. Entangled State photon tangles condition checkout gear according to claim 3, it is characterised in that：The inner layer optical fiber is Rectangular ring, photon input are located at the rectangle right angle of inner layer optical fiber；The outer layer optical fiber is wrapped in outside the inner layer optical fiber Also rectangular ring is formed, photon output end is located at the rectangle right angle of outer layer optical fiber.
- 5. a kind of tangle condition detection method by what claim 3 described device realized Entangled State photon, it is characterised in that bag Include：Local photon in Entangled State two-photon signal is incided in inner layer optical fiber with critical angle from photon input, local light Son shuttling movement in inner layer optical fiber with total reflection mode；Detection photon in Entangled State two-photon signal runs into the change of target generating state, causes the state change of local photon, The change of local photon fortune state from internal memory optical fiber so that be spilled over to outer layer optical fiber, finally by monochromatic light after the output of photon output end Sub- detector detection, so that it is determined that target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711097683.7A CN107871519B (en) | 2017-11-09 | 2017-11-09 | Storage device for entangled-state photons, entangled-state detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711097683.7A CN107871519B (en) | 2017-11-09 | 2017-11-09 | Storage device for entangled-state photons, entangled-state detection device and method |
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| Publication Number | Publication Date |
|---|---|
| CN107871519A true CN107871519A (en) | 2018-04-03 |
| CN107871519B CN107871519B (en) | 2020-06-05 |
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