Dynamically Dressed States of a Quantum Four-Level System
- URL: http://arxiv.org/abs/2506.14643v1
- Date: Tue, 17 Jun 2025 15:40:13 GMT
- Title: Dynamically Dressed States of a Quantum Four-Level System
- Authors: Carolin Calcagno, Friedrich Sbresny, Thomas K. Bracht, Sang Kyu Kim, Eduardo Zubizarreta Casalengua, Katarina Boos, William Rauhaus, Hubert Riedl, Jonathan J. Finley, Doris E. Reiter, Kai Müller,
- Abstract summary: We experimentally and theoretically study the dressed-state emission of the biexciton-exciton cascade in a semiconductor quantum dot under pulsed excitation.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this work, we experimentally and theoretically study the dressed-state emission of the biexciton-exciton cascade in a semiconductor quantum dot under pulsed, resonant, two-photon excitation. Building on the well-characterized steady-state dressed emission of the four-level system, we examine its dynamic counterpart under pulsed, resonant excitation, addressing both experimental observations and theoretical modeling. Here we report several sidebands emerging from the biexciton-to-exciton transition, whose number and spectral width depend on the excitation pulse duration and the effective pulse area, while no sidebands emerge from the exciton-to-ground-state transition. Since the biexciton state population follows a nonlinear pulse area function, sidebands with a small spectral nonlinearity result. Detuning- and time-dependent measurements provide deeper insight into the emission properties of the dressed states. They show that side peak emission only occurs in the presence of the excitation pulse. Moreover, when the system is excited by a Gaussian-shaped laser pulse, side peak emission takes place sequentially.
Related papers
- Electrically induced bulk and edge excitations in the fractional quantum Hall regime [0.0]
We investigate the collective excitations in both the edge and bulk via photoluminescence spectral energy shifts.<n>Introducing an offset in the voltage pulse significantly enhances the excitation signal.<n>Results highlight the topological link between edge and bulk states, providing a novel approach to exploring solid-state analogs of quantum gravity.
arXiv Detail & Related papers (2025-02-03T04:51:37Z) - Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Dissipative stabilization of maximal entanglement between non-identical
emitters via two-photon excitation [49.1574468325115]
Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement.
We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
arXiv Detail & Related papers (2023-06-09T16:49:55Z) - Signatures of dynamically dressed states [0.0]
We present the first experimental observation of the complete resonance fluorescence emission spectrum of a single quantum two-level system.
We observe multiple emerging sidebands as predicted by theory with an increase of their number and spectral detuning with excitation pulse intensity.
arXiv Detail & Related papers (2023-05-25T08:14:26Z) - Probing the symmetry breaking of a light--matter system by an ancillary
qubit [50.591267188664666]
Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena.
We experimentally observe the parity symmetry breaking of an ancillary Xmon artificial atom induced by the field of a lumped-element superconducting resonator.
This result opens a way to experimentally explore the novel quantum-vacuum effects emerging in the deep-strong coupling regime.
arXiv Detail & Related papers (2022-09-13T06:14:08Z) - Effects of spatial quantization and Rabi-shifted resonances in single
and double excitation of quantum wells and wires induced by few-photon
optical field [0.0]
We study the dynamics of Frenkel excitons and bi-excitons induced by few photon quantum light in a quantum well or wire of finite size.
The eigenenergies and eigenfunctions of the coupled exciton-photon states in a multiatomic system are found.
The role of spatial confinement as well as the energy quantization effects in 1D and 2D cases is analyzed.
arXiv Detail & Related papers (2021-12-08T10:39:33Z) - Deterministic single-atom source of quasi-superradiant $N$-photon pulses [62.997667081978825]
Scheme operates with laser and cavity fields detuned from the atomic transition by much more than the excited-state hyperfine splitting.
This enables reduction of the dynamics to that of a simple, cavity-damped Tavis-Cummings model with the collective spin determined by the total angular momentum of the ground hyperfine level.
arXiv Detail & Related papers (2020-12-01T03:55:27Z) - Strongly entangled system-reservoir dynamics with multiphoton pulses
beyond the two-excitation limit: Exciting the atom-photon bound state [62.997667081978825]
We study the non-Markovian feedback dynamics of a two-level system interacting with the electromagnetic field inside a semi-infinite waveguide.
We compare the trapped excitation for an initially excited quantum emitter and an emitter prepared via quantized pulses containing up to four photons.
arXiv Detail & Related papers (2020-11-07T12:56:16Z) - Coherent Dynamics in Quantum Emitters under Dichromatic Excitation [0.0]
We characterize the coherent dynamics of a two-level quantum emitter driven by a pair of symmetrically-detuned phase-locked pulses.
The promise of dichromatic excitation is to spectrally isolate the excitation laser from the quantum emission, enabling background-free photon extraction from the emitter.
arXiv Detail & Related papers (2020-09-04T11:52:39Z) - Theory of waveguide-QED with moving emitters [68.8204255655161]
We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace.
We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
arXiv Detail & Related papers (2020-03-20T12:14:10Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.