Improved Light-Matter Interaction for Storage of Quantum States of Light in a Thulium-Doped Crystal Cavity

• URL: http://arxiv.org/abs/2001.11456v1
• Date: Thu, 30 Jan 2020 17:06:17 GMT
• Title: Improved Light-Matter Interaction for Storage of Quantum States of Light in a Thulium-Doped Crystal Cavity
• Authors: Jacob H. Davidson, Pascal Lefebvre, Jun Zhang, Daniel Oblak, Wolfgang Tittel
• Abstract summary: We implement an atomic frequency comb quantum memory for 793 nm wavelength photons. Results show a memory efficiency of (27.5$pm$ 2.7)% over a 500 MHz bandwidth. This allows us for the first time to store and recall quantum states of light in such a memory.
• Score: 2.8353883265392876
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We design and implement an atomic frequency comb quantum memory for 793 nm wavelength photons using a monolithic cavity based on a thulium-doped Y$_3$Al$_5$O$_{12}$ (Tm:YAG) crystal. Approximate impedance matching results in the absorption of approximately $90\%$ of input photons and a memory efficiency of (27.5$\pm$ 2.7)% over a 500 MHz bandwidth. The cavity enhancement leads to a significant improvement over the previous efficiency in Tm-doped crystals using a quantum memory protocol. In turn, this allows us for the first time to store and recall quantum states of light in such a memory. Our results demonstrate progress toward efficient and faithful storage of single photon qubits with large time-bandwidth product and multi-mode capacity for quantum networking.

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