Quantum Storage of Qubits in an Array of Independently Controllable Solid-State Quantum Memories
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909788699361280 |
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| author | Teller, Markus Plascencia, Susana Grandi, Samuele de Riedmatten, Hugues |
| author_facet | Teller, Markus Plascencia, Susana Grandi, Samuele de Riedmatten, Hugues |
| contents | Random-access quantum memories may offer computational advantages for quantum computers and networks. In this paper, we advance arrays of solid-state quantum memories towards their usage as random-access quantum memory. We perform quantum storage of path and time-bin qubits implemented with weak coherent states at the single-photon level, in an array of ten temporally-multiplexed memory cells with controllable addressing. The qubits can be stored in arbitrary combinations of memory cells, from which they are read-out on demand. We find average fidelities of $95_{-2}^{+2}\;\%$ for path qubits and $91^{+2}_{-2}\;\%$ for time-bin qubits. The measured fidelities violate the classical bounds for both encodings and for all ten cells. We also sequentially store a time-bin qubit in two different memory cells, maintain both qubits simultaneously in the array, and perform a collective read-out. The individual control paired with high storage fidelity represents a significant advance towards a solid-state random-access quantum memory for quantum repeaters and photonic quantum processors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_11910 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum Storage of Qubits in an Array of Independently Controllable Solid-State Quantum Memories Teller, Markus Plascencia, Susana Grandi, Samuele de Riedmatten, Hugues Quantum Physics Random-access quantum memories may offer computational advantages for quantum computers and networks. In this paper, we advance arrays of solid-state quantum memories towards their usage as random-access quantum memory. We perform quantum storage of path and time-bin qubits implemented with weak coherent states at the single-photon level, in an array of ten temporally-multiplexed memory cells with controllable addressing. The qubits can be stored in arbitrary combinations of memory cells, from which they are read-out on demand. We find average fidelities of $95_{-2}^{+2}\;\%$ for path qubits and $91^{+2}_{-2}\;\%$ for time-bin qubits. The measured fidelities violate the classical bounds for both encodings and for all ten cells. We also sequentially store a time-bin qubit in two different memory cells, maintain both qubits simultaneously in the array, and perform a collective read-out. The individual control paired with high storage fidelity represents a significant advance towards a solid-state random-access quantum memory for quantum repeaters and photonic quantum processors. |
| title | Quantum Storage of Qubits in an Array of Independently Controllable Solid-State Quantum Memories |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.11910 |