Stark Echo Modulation for Quantum Memories

Abstract

Quantum memories for optical and microwave photons provide key functionalities in quantum processing and communications. Here we propose a protocol well adapted to solid state ensemble based memories coupled to cavities. It is called Stark Echo Modulation Memory (SEMM), and allows large storage bandwidths and low noise. This is achieved in a echo like sequence combined with phase shifts induced by small electric fields through the linear Stark effect. We investigated the protocol for rare earth nuclear spins and found a high suppression of unwanted collective emissions that is compatible with single photon level operation. Broadband storage together with high fidelity for the Stark retrieval process is also demonstrated. SEMM could be used to store optical or microwave photons in ions and/or spins. This includes NV centers in diamond and rare earth doped crystals, which are among the most promising solid-state quantum memories.

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• A Frequency-Multiplexed Coherent Electro-Optic Memory in Rare Earth Doped Nanoparticles
• Multiresonator quantum memory-interface
• Coherence Time Extension by Large Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
• Collective atom phase controls in photon echoes for quantum memory applications I: Population inversion removal
• Integrated multiresonator quantum memory
• Erbium Quantum Memory Platform with Long Optical Coherence via Back-End of Line Deposition on Foundry-Fabricated Photonics
• Gaussian pulse-induced imperfect rephasing in coherent transients
• A controlled ac Stark echo for quantum memories
• Understanding of collective atom phase control in modified photon echoes for a near perfect, storage time extended quantum memory
• Analysis of controlled Rabi flopping in a double rephasing photon echo scheme for quantum memories