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Telecom-band hyperentangled photon pairs from a fiber-based source

Telecom-band hyperentangled photon pairs from a fiber-based source
Telecom-band hyperentangled photon pairs from a fiber-based source
Hyperentanglement, the simultaneous and independent entanglement of quantum particles in multiple degrees of freedom, is a powerful resource that can be harnessed for efficient quantum information processing. In photonic systems, the two degrees of freedom (DOFs) often used to carry quantum and classical information are polarization and frequency, thanks to their robustness in transmission, both in free space and in optical fibers. Telecom-band hyperentangled photons generated in optical fibers are of particular interest because they are compatible with existing fiber-optic infrastructure and can be distributed over fiber networks with minimal loss. Here, we experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DOFs using a periodically poled silica fiber and observe entanglement concurrences above 0.95 for both polarization and frequency DOFs. Furthermore, by concatenating a Hong-Ou-Mandel interference test for frequency entanglement and full state tomography for polarization entanglement in a single experiment, we can demonstrate simultaneous entanglement in both the polarization and frequency DOFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
1050-2947
Chen, Changjia
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Xu, Calvin
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Riazi, Arash
e54caeb9-1266-4a98-82a4-d37969c9393f
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Greenwood, Alexander
0d28198a-fb55-474f-84ed-36f348308d9a
Gladyshev, Alexey V.
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Kirby, Brian T.
fad7eaff-7519-40f7-a881-f32d1b273683
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3
Chen, Changjia
ab034b72-03b9-4e62-9815-bca04880b116
Xu, Calvin
2938e0a5-285a-482d-8226-cdad8bd06536
Riazi, Arash
e54caeb9-1266-4a98-82a4-d37969c9393f
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Greenwood, Alexander
0d28198a-fb55-474f-84ed-36f348308d9a
Gladyshev, Alexey V.
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Kirby, Brian T.
fad7eaff-7519-40f7-a881-f32d1b273683
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3

Chen, Changjia, Xu, Calvin, Riazi, Arash, Zhu, Eric Y., Greenwood, Alexander, Gladyshev, Alexey V., Kazansky, Peter, Kirby, Brian T. and Qian, Li (2022) Telecom-band hyperentangled photon pairs from a fiber-based source. Physical Review A, 105 (4), [043702]. (doi:10.1103/PhysRevA.105.043702).

Record type: Article

Abstract

Hyperentanglement, the simultaneous and independent entanglement of quantum particles in multiple degrees of freedom, is a powerful resource that can be harnessed for efficient quantum information processing. In photonic systems, the two degrees of freedom (DOFs) often used to carry quantum and classical information are polarization and frequency, thanks to their robustness in transmission, both in free space and in optical fibers. Telecom-band hyperentangled photons generated in optical fibers are of particular interest because they are compatible with existing fiber-optic infrastructure and can be distributed over fiber networks with minimal loss. Here, we experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DOFs using a periodically poled silica fiber and observe entanglement concurrences above 0.95 for both polarization and frequency DOFs. Furthermore, by concatenating a Hong-Ou-Mandel interference test for frequency entanglement and full state tomography for polarization entanglement in a single experiment, we can demonstrate simultaneous entanglement in both the polarization and frequency DOFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.

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2112.03369 - Accepted Manuscript
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Accepted/In Press date: 23 March 2022
e-pub ahead of print date: 31 March 2022
Published date: 4 April 2022
Additional Information: arXiv:2112.03369 ©2022 American Physical Society

Identifiers

Local EPrints ID: 457495
URI: http://eprints.soton.ac.uk/id/eprint/457495
ISSN: 1050-2947
PURE UUID: fd7865f1-2389-4e38-b225-6aface63ba0c

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Date deposited: 09 Jun 2022 17:05
Last modified: 27 Oct 2022 19:10

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Contributors

Author: Changjia Chen
Author: Calvin Xu
Author: Arash Riazi
Author: Eric Y. Zhu
Author: Alexander Greenwood
Author: Alexey V. Gladyshev
Author: Peter Kazansky
Author: Brian T. Kirby
Author: Li Qian

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