aqora

Decay dynamics of matter-wave quantum emitters in a band structure

Dominik Schneble

We present experiments on radiative decay of quantum emitters in a band structure. Our waveguide-QED simulation, which explored variable vacuum couplings and the interplay of bound states, was performed with ultracold atomic matter waves in an optical lattice.

Frontiers in OpticsJan 1, 20200 citations

Quantum Emitters in Two-Dimensional Structured Reservoirs in the Nonperturbative Regime

Alejandro González-Tudela, J. I. Cirac

We show that the coupling of quantum emitters to a two-dimensional reservoir with a simple band structure gives rise to exotic quantum dynamics with no analogue in other scenarios and which cannot be captured by standard perturbative treatments. In particular, for a single quantum emitter with its transition frequency in the middle of the band, we predict an exponential relaxation at a rate different from that predicted by Fermi's golden rule, followed by overdamped oscillations and slow relaxation decay dynamics. This is accompanied by directional emission into the reservoir. This directionality leads to a modification of the emission rate for few emitters and even perfect subradiance, i.e., suppression of spontaneous emission, for four quantum emitters.We show that the coupling of quantum emitters to a two-dimensional reservoir with a simple band structure gives rise to exotic quantum dynamics with no analogue in other scenarios and which cannot be captured by standard perturbative treatments. In particular, for a single quantum emitter with its transition frequency in the middle of the band, we predict an exponential relaxation at a rate different from that predicted by Fermi's golden rule, followed by overdamped oscillations and slow relaxation decay dynamics. This is accompanied by directional emission into the reservoir. This directionality leads to a modification of the emission rate for few emitters and even perfect subradiance, i.e., suppression of spontaneous emission, for four quantum emitters.

arXiv:1705.06673Physical Review LettersOct 4, 2017119 citations

Super- and subradiant dynamics of quantum emitters mediated by atomic matter waves

Youngshin Kim, Alfonso Lanuza, Dominik Schneble

arXiv:2311.09474Nature PhysicsNov 18, 20249 citations

Reprint of : Dynamics of a quantum wave emitted by a decaying and evanescent point source

F.S. Delgado, Juan Gonzalo Muga

Physica E Low-dimensional Systems and NanostructuresApr 9, 20160 citations

Exact solution for the collective non-Markovian decay of two fully excited quantum emitters

Alfonso Lanuza, Dominik Schneble

Waveguide quantum electrodynamics constitutes a modern paradigm for the interaction of light and matter, in which strong coupling, bath structure, and propagation delays can break the radiative conditions that quantum emitters typically encounter in free space. These characteristics intertwine the excitations of quantum emitters and guided radiation modes to form complex multiphoton dynamics. So far, combining the collective decay of the emitters with the non-Markovian effects induced by the modes has escaped a full solution and the detailed physics behind these systems remains unknown. Here we analyze such a collective non-Markovian decay in a minimal system of two excited emitters coupled to a one-dimensional single-band waveguide. We develop an exact solution for this system in terms of elementary functions that unveils hidden symmetries and predicts new forms of spontaneous decay. The collective non-Markovian dynamics, which are strongly dependent on the vacuum coupling and the detuning from the center of the band, show exotic features that can be characterized with a simple and readily available criterion. Our analytic methods shed light on the complexity of collective light-matter interactions and open up a pathway for understanding multiparticle open quantum systems. Published by the American Physical Society 2024Waveguide quantum electrodynamics constitutes a modern paradigm for the interaction of light and matter, in which strong coupling, bath structure, and propagation delays can break the radiative conditions that quantum emitters typically encounter in free space. These characteristics intertwine the excitations of quantum emitters and guided radiation modes to form complex multiphoton dynamics. So far, combining the collective decay of the emitters with the non-Markovian effects induced by the modes has escaped a full solution and the detailed physics behind these systems remains unknown. Here we analyze such a collective non-Markovian decay in a minimal system of two excited emitters coupled to a one-dimensional single-band waveguide. We develop an exact solution for this system in terms of elementary functions that unveils hidden symmetries and predicts new forms of spontaneous decay. The collective non-Markovian dynamics, which are strongly dependent on the vacuum coupling and the detuning from the center of the band, show exotic features that can be characterized with a simple and readily available criterion. Our analytic methods shed light on the complexity of collective light-matter interactions and open up a pathway for understanding multiparticle open quantum systems. Published by the American Physical Society 2024

arXiv:2403.13871Physical Review ResearchAug 21, 20245 citations

Dynamics of a quantum wave emitted by a decaying and evanescent point source

F.S. Delgado, Juan Gonzalo Muga

arXiv:2208.14169Physica E Low-dimensional Systems and NanostructuresJun 24, 20152 citations

Dynamics of matter-wave quantum emitters in a structured vacuum

Abstract

Related papers

Dynamics of matter-wave quantum emitters in a structured vacuum

Abstract

Related papers