Massively-multiplexed generation of Bell-type entanglement using a quantum memory
Abstract
High-rate generation of hybrid photon-matter entanglement remains a fundamental building block of quantum network architectures enabling protocols such as quantum secure communication or quantum distributed computing. While a tremendous effort has been made to overcome technological constraints limiting the efficiency and coherence times of current systems, an important complementary approach is to employ parallel and multiplexed architectures. Here we follow this approach experimentally demonstrating the generation of bipartite polarization-entangled photonic states across more than 500 modes, with a programmable delay for the second photon enabled by qubit storage in a wavevector-multiplexed cold-atomic quantum memory. We demonstrate Clauser, Horne, Shimony, Holt inequality violation by over 3 standard deviations, lasting for at least 45 μs storage time for half of the modes. The ability to shape hybrid entanglement between the polarization and wavevector degrees of freedom provides not only multiplexing capabilities but also brings prospects for novel protocols.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 08, 2021
- Source ID
- 10.1038/s42005-021-00551-1
Entities
People
- Adam Leszczyński
- Mateusz Mazelanik
- Michał Lipka
- Michał Parniak
- Wojciech Wasilewski
Organizations
- Ministry of Science and Higher Education
- National Science Centre Poland
- Office of Naval Research Global