Efficient Quantum Transduction Using Anti-Ferromagnetic Topological
Insulators
- URL: http://arxiv.org/abs/2308.09048v2
- Date: Wed, 1 Nov 2023 17:12:18 GMT
- Title: Efficient Quantum Transduction Using Anti-Ferromagnetic Topological
Insulators
- Authors: Haowei Xu, Changhao Li, Guoqing Wang, Hao Tang, Paola Cappellaro, and
Ju Li
- Abstract summary: We propose solid-state anti-ferromagnetic topological insulators to serve as highly effective transducers.
We show that single-photon quantum efficiency exceeding 80% can be achieved with modest experimental requirements.
The strong nonlinear photonic interactions in magnetic topological insulators can find diverse applications.
- Score: 10.115394047612014
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Transduction of quantum information between distinct quantum systems is an
essential step in various applications, including quantum networks and quantum
computing. However, mediating photons of vastly different frequencies and
designing high-performance transducers are challenging, due to multifaceted and
sometimes conflicting requirements. In this work, we first discuss some general
principles for quantum transducer design, and then propose solid-state
anti-ferromagnetic topological insulators to serve as highly effective
transducers. First, topological insulators exhibit band-inversion, which can
greatly enhance their optical responses. This property, coupled with robust
spin-orbit coupling and high spin density, results in strong nonlinear
interaction in magnetic topological insulators, thereby substantially improving
transduction efficiency. Second, the anti-ferromagnetic order can minimize the
detrimental influence on other neighboring quantum systems due to magnetic
interactions. Using MnBi2Te4 as an example, we showcase that single-photon
quantum transduction efficiency exceeding 80% can be achieved with modest
experimental requirements, while the transduction bandwidth can reach the GHz
range. The strong nonlinear photonic interactions in magnetic topological
insulators can find diverse applications, including the generation of
entanglement between photons of disparate frequencies and quantum squeezing.
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