Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909359285469184 |
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| author | Duranti, Stefano Wengerowsky, Sören Feldmann, Leo Seri, Alessandro Casabone, Bernardo de Riedmatten, Hugues |
| author_facet | Duranti, Stefano Wengerowsky, Sören Feldmann, Leo Seri, Alessandro Casabone, Bernardo de Riedmatten, Hugues |
| contents | We report on the high-efficiency storage and retrieval of weak coherent optical pulses and photonic qubits in a cavity-enhanced solid-state quantum memory. By using an atomic frequency comb (AFC) memory in a $Pr^{3+}:Y_2 SO_5$ crystal embedded in a low-finesse impedance-matched cavity, we stored weak coherent pulses at the single photon level with up to 62% efficiency for a pre-determined storage time of 2 $μ$s. We also confirmed that the impedance-matched cavity enhances the efficiency for longer storage times up to 70 $μ$s. Taking advantage of the temporal multimodality of the AFC scheme, we then store weak coherent time-bin qubits with (51+-2)% efficiency and a measurement-device limited fidelity over (94.8+-1.4)% for the retrieved qubits. These results represent the most efficient storage in a single photon level AFC memory and the most efficient qubit storage in a solid-state quantum memory up-to-date. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_03509 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory Duranti, Stefano Wengerowsky, Sören Feldmann, Leo Seri, Alessandro Casabone, Bernardo de Riedmatten, Hugues Quantum Physics We report on the high-efficiency storage and retrieval of weak coherent optical pulses and photonic qubits in a cavity-enhanced solid-state quantum memory. By using an atomic frequency comb (AFC) memory in a $Pr^{3+}:Y_2 SO_5$ crystal embedded in a low-finesse impedance-matched cavity, we stored weak coherent pulses at the single photon level with up to 62% efficiency for a pre-determined storage time of 2 $μ$s. We also confirmed that the impedance-matched cavity enhances the efficiency for longer storage times up to 70 $μ$s. Taking advantage of the temporal multimodality of the AFC scheme, we then store weak coherent time-bin qubits with (51+-2)% efficiency and a measurement-device limited fidelity over (94.8+-1.4)% for the retrieved qubits. These results represent the most efficient storage in a single photon level AFC memory and the most efficient qubit storage in a solid-state quantum memory up-to-date. |
| title | Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2307.03509 |