Molecular Entanglement Witness by Absorption Spectroscopy in Cavity QED
Wu W, Fassioli F, Huse DA, Scholes GD (2025)
Publication Type: Journal article
Publication year: 2025
Journal
Book Volume: 16
Pages Range: 7369-7375
Journal Issue: 29
DOI: 10.1021/acs.jpclett.5c01392
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.
Authors with CRIS profile
Francesca Fassioli Olsen
Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien
Involved external institutions
United States (USA) (US)How to cite
APA:
Wu, W., Fassioli, F., Huse, D.A., & Scholes, G.D. (2025). Molecular Entanglement Witness by Absorption Spectroscopy in Cavity QED. Journal of Physical Chemistry Letters, 16(29), 7369-7375. https://doi.org/10.1021/acs.jpclett.5c01392
MLA:
Wu, Weijun, et al. "Molecular Entanglement Witness by Absorption Spectroscopy in Cavity QED." Journal of Physical Chemistry Letters 16.29 (2025): 7369-7375.
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