Electromagnetically-induced transparency assists the Raman gradient echo memory at moderate detuning, dependent on gradient order
arXiv:2312.12714 · doi:10.1088/1367-2630/ad4abb
Abstract
Optical quantum memories are essential for quantum communications and photonic quantum technologies. Ensemble optical memories based on 3-level interactions are a popular basis for implementing these memories. All such memories, however, suffer from loss due to scattering. In off-resonant 3-level interactions, such as the Raman gradient echo memory (GEM), scattering loss can be reduced by a large detuning from the intermediate state. In this work, we show how electromagnetically induced transparency adjacent to the Raman absorption line plays a crucial role in reducing scattering loss, so that maximum efficiency is in fact achieved at a moderate detuning. Furthermore, the effectiveness of the transparency, and therefore the efficiency of GEM, depends on the order in which gradients are applied to store and recall the light. We provide a theoretical analysis and show experimentally how the efficiency depends on gradient order and detuning.
References in corpus (29)
- Long-distance quantum communication with atomic ensembles and linear optics
- Quantum interface between light and atomic ensembles
- Advances in Photonic Quantum Sensing
- Quantum memory for photons: I. Dark state polaritons
- Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
- Mapping photonic entanglement into and out of a quantum memory
- Quantum memories: emerging applications and recent advances
- Towards high-speed optical quantum memories
- High efficiency coherent optical memory with warm rubidium vapour
- Telecom-heralded entanglement between remote multimode solid-state quantum memories
- Prospective applications of optical quantum memories
- Demonstration of atomic frequency comb memory for light with spin-wave storage
- Highly efficient coherent optical memory based on electromagnetically induced transparency
- Photon storage in Lambda-type optically dense atomic media. II. Free-space model
- XMDS2: Fast, scalable simulation of coupled stochastic partial differential equations
- Highly efficient optical quantum memory with long coherence time in cold atoms
- Advances in device-independent quantum key distribution
- Light storage for one second at room temperature
- Towards highly multimode optical quantum memory for quantum repeaters
- Creation of long-term coherent optical memory via controlled nonlinear interactions in Bose-Einstein condensates
- Photon echoes generated by reversing magnetic field gradients in a rubidium vapour
- Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting
- Fast, noise-free memory for photon synchronization at room temperature
- Pairwise entanglement and readout of atomic-ensemble and optical wave-packet modes in traveling-wave Raman interactions
- Configurable unitary transformations and linear logic gates using quantum memories
- Raman scheme for adjustable bandwidth quantum memory
- High-performance Raman memory with spatio-temporal reversal
- Interplay between electromagnetically induced transparency(EIT), absorption (EIA) and Autler-Townes (AT) splitting in N-type atomic system: An experiment and theory
- Optimising the Efficiency of a Quantum Memory based on Rephased Amplified Spontaneous Emission