Towards searching for entangled photons in the CMB sky
We explore the possibility of detecting entangled photon pairs from cosmic microwave background or other cosmological sources coming from two patches of the sky. The measurements use two detectors with different photon polarizer directions. When two photon sources are separated by a large angle rela...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120137 |
| _version_ | 1826190628910792704 |
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| author | Chen, Jiunn-Wei Dai, Shou-Huang Maity, Debaprasad Sun, Sichun Zhang, Yun-Long |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Chen, Jiunn-Wei Dai, Shou-Huang Maity, Debaprasad Sun, Sichun Zhang, Yun-Long |
| author_sort | Chen, Jiunn-Wei |
| collection | MIT |
| description | We explore the possibility of detecting entangled photon pairs from cosmic microwave background or other cosmological sources coming from two patches of the sky. The measurements use two detectors with different photon polarizer directions. When two photon sources are separated by a large angle relative to the earth, such that each detector has only one photon source in its field of view, a null test of unentangled photons can be performed. The deviation from this unentangled background is, in principle, the signature of photon entanglement. To confirm whether the deviation is consistent with entangled photons, we derive a photon polarization correlation to compare with, similar to that in a Bell inequality measurement. However, since photon coincidence measurement cannot be used to discriminate unentangled cosmic photons, it is unlikely that the correlation expectation value alone can violate Bell inequality to provide the signature for entanglement. |
| first_indexed | 2024-09-23T08:42:59Z |
| format | Article |
| id | mit-1721.1/120137 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:42:59Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1201372022-09-30T10:44:15Z Towards searching for entangled photons in the CMB sky Chen, Jiunn-Wei Dai, Shou-Huang Maity, Debaprasad Sun, Sichun Zhang, Yun-Long Massachusetts Institute of Technology. Center for Theoretical Physics Chen, Jiunn-Wei Sun, Sichun We explore the possibility of detecting entangled photon pairs from cosmic microwave background or other cosmological sources coming from two patches of the sky. The measurements use two detectors with different photon polarizer directions. When two photon sources are separated by a large angle relative to the earth, such that each detector has only one photon source in its field of view, a null test of unentangled photons can be performed. The deviation from this unentangled background is, in principle, the signature of photon entanglement. To confirm whether the deviation is consistent with entangled photons, we derive a photon polarization correlation to compare with, similar to that in a Bell inequality measurement. However, since photon coincidence measurement cannot be used to discriminate unentangled cosmic photons, it is unlikely that the correlation expectation value alone can violate Bell inequality to provide the signature for entanglement. 2019-01-28T17:24:25Z 2019-01-28T17:24:25Z 2019-01 2017-01 2019-01-04T18:00:20Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/120137 Chen, Jiunn-Wei et al. "Towards searching for entangled photons in the CMB sky." Physical Review D 99, 2 (January 2019): 023507 © 2019 American Physical Society en http://dx.doi.org/10.1103/PhysRevD.99.023507 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Chen, Jiunn-Wei Dai, Shou-Huang Maity, Debaprasad Sun, Sichun Zhang, Yun-Long Towards searching for entangled photons in the CMB sky |
| title | Towards searching for entangled photons in the CMB sky |
| title_full | Towards searching for entangled photons in the CMB sky |
| title_fullStr | Towards searching for entangled photons in the CMB sky |
| title_full_unstemmed | Towards searching for entangled photons in the CMB sky |
| title_short | Towards searching for entangled photons in the CMB sky |
| title_sort | towards searching for entangled photons in the cmb sky |
| url | http://hdl.handle.net/1721.1/120137 |
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