Theory Seminar: Atomic waveguide QED with atomic dimers
David Castells (MPQ):
Quantum emitters coupled to a waveguide is a paradigm of quantum optics, whose essential properties are described by waveguide quantum electrodynamics (QED).
David Castells (MPQ)
Group Seminar via Zoom
Wed 30. June 2021, 11:30 am (MEZ)
Quantum emitters coupled to a waveguide is a paradigm of quantum optics, whose essential properties are described by waveguide quantum electrodynamics (QED). We study the possibility of observing the typical features of the conventional waveguide QED scenario in a system where the role of the waveguide is played by a one-dimensional subwavelength atomic array. For the role of emitters, we propose to use anti-symmetric states of atomic dimers - pair of closely spaced atoms - as effective two-level systems, which significantly reduce the effect of free-space spontaneous emission. We solve the dynamics of the system for both cases of the dimer's frequency being resonant with or detuned from the band of the array's propagating modes. Along with well-known phenomena of collective emission into the guided modes and waveguide-mediated long-range dimer-dimer interactions, we uncover significant non-Markovian corrections which arise from both the finiteness of the array and through retardation effects.
If you'd like to participate in the seminar, please contact us!