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8 papers · 2 filters
Identifying weak values with intrinsic dynamical properties in Modal theories
Devashish Pandey, Rui Sampaio, Tapio Ala-Nissila +2
The so-called eigenvalue-eigenstate link states that no property can be associated to a quantum system unless it is in an eigenstate of the corresponding operator. This precludes t…
Reduced Density-Matrix Approach to Strong Matter-Photon Interaction
Florian Buchholz, Iris Theophilou, Soeren Ersbak Bang Nielsen +2
We present a first-principles approach to electronic many-body systems strongly coupled to cavity modes in terms of matter-photon one-body reduced density matrices. The theory is f…
Quantum theory of superfluorescence based on two-point correlation functions
Andrei Benediktovitch, Vinay P. Majety, Nina Rohringer
Irradiation of a medium by short intense pulses from x-ray / XUV free electron lasers can result in saturated photoionization of inner electronic shells. As a result an inversion o…
Light-matter interaction in the long-wavelength limit: no ground-state without dipole self-energy
Vasil Rokaj, Davis M. Welakuh, Michael Ruggenthaler +1
Most theoretical studies for correlated light-matter systems are performed within the long-wavelength limit, i.e., the electromagnetic field is assumed to be spatially uniform. In…
Hidden Order in Quantum Many-body Dynamics of Driven-Dissipative Nonlinear Photonic Lattices
Jirawat Tangpanitanon, Stephen R. Clark, V. M. Bastidas +3
We study the dynamics of nonlinear photonic lattices driven by two-photon parametric processes. By means of matrix-product-state based calculations, we show that a quantum many-bod…
Ab-initio non-relativistic quantum electrodynamics: Bridging quantum chemistry and quantum optics from weak to strong coupling
Christian Schäfer, Michael Ruggenthaler, Angel Rubio
By applying the Born-Huang expansion, originally developed for coupled nucleus-electron systems, to the full nucleus-electron-photon Hamiltonian of non-relativistic quantum electro…