A Cavity-Enhanced Room-Temperature Broadband Raman Memory
Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali vapour Raman memories combine high-bandwidth storage, on-demand read-out, and operation at room temperature without collisional fluorescence noise. However, previous implem...
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| creator | Saunders, D J Munns, J H D Champion, T F M Qiu, C Kaczmarek, K T Poem, E Ledingham, P M Walmsley, I A Nunn, J |
| description | Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali vapour Raman memories combine high-bandwidth storage, on-demand read-out, and operation at room temperature without collisional fluorescence noise. However, previous implementations have required large control pulse energies and suffered from four-wave mixing noise. Here we present a Raman memory where the storage interaction is enhanced by a low-finesse birefringent cavity tuned into simultaneous resonance with the signal and control fields, dramatically reducing the energy required to drive the memory. By engineering anti-resonance for the anti-Stokes field, we also suppress the four-wave mixing noise and report the lowest unconditional noise floor yet achieved in a Raman-type warm vapour memory, \((15\pm2)\times10^{-3}\) photons per pulse, with a total efficiency of \((9.5\pm0.5)\)%. |
| doi_str_mv | 10.48550/arxiv.1510.04625 |
| format | Article |
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| source | Freely Accessible Journals; arXiv.org |
| subjects | Bandwidths Broadband Fluorescence Four-wave mixing Multiplexing Noise Photonics Photons Physics - Quantum Physics Quantum phenomena Room temperature |
| title | A Cavity-Enhanced Room-Temperature Broadband Raman Memory |
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