Heralded entanglement of on-demand spin-wave solid-state quantum memories for multiplexed quantum network links
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909859212951552 |
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| author | Hänni, Jonathan Rodríguez-Moldes, Alberto E. Appas, Félicien Wengerowsky, Soeren Lago-Rivera, Dario Teller, Markus Grandi, Samuele de Riedmatten, Hugues |
| author_facet | Hänni, Jonathan Rodríguez-Moldes, Alberto E. Appas, Félicien Wengerowsky, Soeren Lago-Rivera, Dario Teller, Markus Grandi, Samuele de Riedmatten, Hugues |
| contents | The ability to distribute heralded entanglement between distant matter nodes is a primitive for the implementation of large-scale quantum networks. Some of the most crucial requirements for future applications include high heralding rates at telecom wavelengths, multiplexed operation and on-demand retrieval of stored excitations for synchronization of separate quantum links. Despite tremendous progress in various physical systems, the demonstration of telecom-heralded entanglement between quantum nodes featuring both multiplexed operation and on-demand retrieval remains elusive. In this work, we combine narrowband parametric photon-pair sources and solid-state quantum memories based on rare-earth doped crystals to demonstrate telecom heralded entanglement between spatially separated spin-wave quantum memories with fully adjustable recall time and temporal multiplexing of 15 modes. In a first experiment, the storage in the spin-state is conditioned on the entanglement heralding. We take advantage of the control over readout pulse phase to achieve feed-forward conditional phase-shifts on the stored photons depending on which heralding detector clicked. We exploit this effect to double the entanglement heralding rate for a given quantum state up to 510 cps, with an associated detection rate of 0.32 cps and measured positive concurrence by up to 6 standard deviations. In a second experiment, we simulate the communication time of a long-distance link by implementing an unconditional storage scheme with a dead-time of 100 $μ$s. We take advantage of temporal multiplexing to increase the entanglement rates by a factor of 15 with respect to single mode storage, reaching a value of 22 cps per heralding detector. These results establish our architecture as a prime candidate for the implementation of scalable high-rate quantum network links. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_04131 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Heralded entanglement of on-demand spin-wave solid-state quantum memories for multiplexed quantum network links Hänni, Jonathan Rodríguez-Moldes, Alberto E. Appas, Félicien Wengerowsky, Soeren Lago-Rivera, Dario Teller, Markus Grandi, Samuele de Riedmatten, Hugues Quantum Physics The ability to distribute heralded entanglement between distant matter nodes is a primitive for the implementation of large-scale quantum networks. Some of the most crucial requirements for future applications include high heralding rates at telecom wavelengths, multiplexed operation and on-demand retrieval of stored excitations for synchronization of separate quantum links. Despite tremendous progress in various physical systems, the demonstration of telecom-heralded entanglement between quantum nodes featuring both multiplexed operation and on-demand retrieval remains elusive. In this work, we combine narrowband parametric photon-pair sources and solid-state quantum memories based on rare-earth doped crystals to demonstrate telecom heralded entanglement between spatially separated spin-wave quantum memories with fully adjustable recall time and temporal multiplexing of 15 modes. In a first experiment, the storage in the spin-state is conditioned on the entanglement heralding. We take advantage of the control over readout pulse phase to achieve feed-forward conditional phase-shifts on the stored photons depending on which heralding detector clicked. We exploit this effect to double the entanglement heralding rate for a given quantum state up to 510 cps, with an associated detection rate of 0.32 cps and measured positive concurrence by up to 6 standard deviations. In a second experiment, we simulate the communication time of a long-distance link by implementing an unconditional storage scheme with a dead-time of 100 $μ$s. We take advantage of temporal multiplexing to increase the entanglement rates by a factor of 15 with respect to single mode storage, reaching a value of 22 cps per heralding detector. These results establish our architecture as a prime candidate for the implementation of scalable high-rate quantum network links. |
| title | Heralded entanglement of on-demand spin-wave solid-state quantum memories for multiplexed quantum network links |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2501.04131 |