High-performance cavity-enhanced quantum memory with warm atomic cell
- URL: http://arxiv.org/abs/2206.08508v1
- Date: Fri, 17 Jun 2022 01:59:26 GMT
- Title: High-performance cavity-enhanced quantum memory with warm atomic cell
- Authors: Lixia Ma, Xing Lei, Jieli Yan, Ruiyang Li, Ting Chai, Zhihui Yan,
Xiaojun Jia, Changde Xie and Kunchi Peng
- Abstract summary: We report a high-performance cavity-enhanced electromagnetically-induced-transparency memory with warm atomic cell.
It has been experimentally demonstrated that the average fidelities for a set of input coherent states with different phases and amplitudes within a Gaussian distribution have exceeded the classical benchmark fidelities.
- Score: 1.0539847330971805
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: High-performance quantum memory for quantized states of light is a
prerequisite building block of quantum information technology. Despite great
progresses of optical quantum memories based on interactions of light and
atoms, physical features of these memories still cannot satisfy requirements
for applications in practical quantum information systems, since all of them
suffer from trade-off between memory efficiency and excess noise. Here, we
report a high-performance cavity-enhanced
electromagnetically-induced-transparency memory with warm atomic cell in which
a scheme of optimizing the spatial and temporal modes based on the
time-reversal approach is applied. The memory efficiency up to 67% is directly
measured and a noise level close to quantum noise limit is simultaneously
reached. It has been experimentally demonstrated that the average fidelities
for a set of input coherent states with different phases and amplitudes within
a Gaussian distribution have exceeded the classical benchmark fidelities. Thus
the realized quantum memory platform has been capable of preserving quantized
optical states, and is ready to be applied in quantum information systems, such
as distributed quantum logic gates and quantum-enhanced atomic magnetometry.
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