Molecular Entanglement Witness by Absorption Spectroscopy in Cavity QED.

IF 4.8 2区 化学 Q2 CHEMISTRY, PHYSICAL
Weijun Wu, Francesca Fassioli, David A Huse, Gregory D Scholes
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引用次数: 0

Abstract

Producing and maintaining molecular entanglement at room temperature and detecting multipartite entanglement features of macroscopic molecular systems remain key challenges for understanding intermolecular quantum effects in chemistry. Here, we study the quantum Fisher information, as a multipartite entanglement witness. We generalize the entanglement witness functional related to quantum Fisher information regarding nonidentical local response operators. We demonstrate its effectiveness for intermolecular entanglement in ultrastrong light-matter coupling in cavity quantum electrodynamics, including near the superradiant phase transition. Additionally, we establish a connection between quantum Fisher information and the dipole correlator, indicating that entanglement could be detected through absorption spectroscopy. Our work proposes a general protocol to detect intermolecular entanglement in chemical systems at room temperature.

腔QED中分子纠缠的吸收光谱见证。
室温下分子纠缠的产生和维持以及宏观分子系统的多重纠缠特征的检测是理解分子间量子效应的关键挑战。在这里,我们研究了作为多方纠缠见证的量子费雪信息。推广了非相同局部响应算子上与量子Fisher信息相关的纠缠见证泛函。我们证明了在腔量子电动力学中,包括超辐射相变附近的超强光-物质耦合中的分子间纠缠的有效性。此外,我们建立了量子费雪信息和偶极相关器之间的联系,表明可以通过吸收光谱检测纠缠。我们的工作提出了一种在室温下检测化学系统分子间纠缠的通用方案。
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来源期刊
The Journal of Physical Chemistry Letters
The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
9.60
自引率
7.00%
发文量
1519
审稿时长
1.6 months
期刊介绍: The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.
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