Abstract
As introduced in Sect. 1.3, organic molecules were initially used in order to achieve robust room-temperature strong coupling, and were merely seen as another method to manipulate light. However, their complex internal structure soon became apparent in many experiments where nuclear degrees of freedom played a relevant role. The necessity of a theory of strong coupling that included the rovibrational structure was undeniable. Such a theory implies having a nucleus–electron–photon coupled system, in which three different timescales play a role.
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Notes
- 1.
Due to nuclear symmetry, the only contribution to the total dipole moment operator is electronic. Including an asymmetry in our model makes the nuclear contribution to the dipole non-zero and thus \(\hat{\mu }=\hat{x} + \hat{R}\). This would add a non-zero permanent dipole to the molecule, which could introduce small energy contributions to the PES. We note that this does not change the qualitative analysis of this chapter, and that we include a discussion of its effects on the ground state in Sect. 6.6.
- 2.
We note that this is only true because we do not have permanent dipole moments in our model, which couple states of the form \(|k,k,0\rangle \) and \(|k,k,1\rangle \).
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Galego Pascual, J. (2020). Molecular Structure in Electronic Strong Coupling. In: Polaritonic Chemistry. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-48698-3_3
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