Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Optics II

Q 48.3: Talk

Thursday, March 14, 2019, 11:00–11:15, S Ex 04 E-Tech

Optical Binding Energy: Contributions from Octupole Coupling — •A Salam — Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109-7486, USA

Following a pioneering QED calculation by Thirunamachandran of the radiation-induced dispersion energy shift between a pair of electric dipole polarisable molecules [1], higher-order contributions dependent upon magnetic dipole and electric quadrupole couplings have been evaluated [2-4]. We account for electric octupole coupling and calculate, within QED theory [5], the optical binding energies between an electric dipole polarisable molecule and another that is either mixed dipole-octupole or pure octupole polarisable, and between two mixed dipole-octupole polarisable species. Additional leading order corrections to the dipolar shift are found that depend explicitly on the octupole weight-1 moment, as also occurs in resonance energy transfer [6], and pair [7,8] and three-body [9] dispersion interactions.

[1] T. Thirunamachandran, Mol. Phys. 40, 393 (1980). [2] A. Salam, Phys. Rev. A 73, 013406 (2006). [3] A. Salam, J. Chem. Phys. 124, 014302 (2006). [4] K. A. Forbes and D. L. Andrews, Phys. Rev. A 91, 053824 (2015). [5] A. Salam, Molecular Quantum Electrodynamics, Wiley, Hoboken, 2010. [6] A. Salam, J. Chem. Phys. 122, 044112 (2005). [7] A. Salam and T. Thirunamachandran, J. Chem. Phys. 104, 5094 (1996). [8] A. Salam, Mol. Phys.https://doi.org/10.1080/00268976.2018.1509143 [9] S. Y. Buhmann and A. Salam, Symmetry 10, 343 (2018).