Collective nuclear excitation dynamics in mono-modal x-ray waveguides

• URL: http://arxiv.org/abs/2403.06508v1
• Date: Mon, 11 Mar 2024 08:35:04 GMT
• Title: Collective nuclear excitation dynamics in mono-modal x-ray waveguides
• Authors: Leon M. Lohse, Petar Andreji\'c, Sven Velten, Malte Vassholz, Charlotte Neuhaus, Ankita Negi, Anjali Panchwanee, Ilya Sergeev, Adriana P\'alffy, Tim Salditt, Ralf R\"ohlsberger
• Abstract summary: M"ossbauer nuclei placed in planar x-ray waveguides show distinct temporal emission characteristics. Our findings pave the way for applications ranging from fundamental studies of cooperative emission at hard x-ray frequencies up to new methods of narrowband x-ray control via the engineering of collective radiation patterns.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Ensembles of identical atoms exhibit peculiar collective properties in their interaction with radiation depending on geometry and environment where they are embedded in. A remarkably clean and versatile platform to study collective effects in resonant light scattering are M\"ossbauer nuclei placed in planar x-ray waveguides. Here we conceive and demonstrate experimentally distinct temporal emission characteristics in these systems, ranging from a tunable accelerated exponential decay all the way to a pronounced oscillatory emission pattern, depending on the waveguide geometry and mode of excitation. The observed temporal and spatial emission characteristics of the collectively excited nuclear state in the waveguide -- the nuclear exciton -- are well reproduced by a unified theoretical model. Our findings pave the way for applications ranging from fundamental studies of cooperative emission at hard x-ray frequencies up to new methods of narrowband x-ray control via the engineering of collective radiation patterns.

Related papers

• Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
  Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them. Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
  arXiv  Detail & Related papers  (2023-12-04T15:35:41Z)
• Super- and subradiant dynamics of quantum emitters mediated by atomic matter waves [0.0]
  We explore cooperative dynamics of quantum emitters in an optical lattice that interact by radiating atomic matter waves. We demonstrate directional super- and subradiance from a superfluid phase with tunable radiative phase lags. We observe a coupling to collective bound states with radiation trapped at and between the emitters.
  arXiv  Detail & Related papers  (2023-11-16T00:37:06Z)
• A characterization and detection method for x-ray excitation of M\"ossbauer nuclei beyond the low-excitation regime [0.0]
  X-ray free-electron lasers promise a substantial enhancement of the number of nuclear-resonant photons per pulse. We show that the ratio of the two observables is constant within the LER. We develop a variety of experimental signatures both, for near-instantaneous impulsive and for temporally-extended non-impulsive x-ray excitation.
  arXiv  Detail & Related papers  (2023-08-15T08:47:30Z)
• Waveguide QED with Moessbauer Nuclei [0.0]
  Thin-film nanostructures with embedded M"ossbauer nuclei have been successfully used for x-ray quantum optical applications. Here we address theoretically a new geometry, in which hard x-rays are coupled in forward incidence. We show that it combines aspects of both nuclear forward scattering, visible as dynamical beating in the grazing-temporal response, and the resonance structure from grazing incidence, visible in the spectrum of guided modes.
  arXiv  Detail & Related papers  (2023-05-19T12:53:00Z)
• Concentrated subradiant modes in one-dimensional atomic array coupled with chiral waveguides [0.510036543634541]
  Non-Hermitian systems have recently attracted broad interest and exhibited intriguing physical phenomena. Here we propose a non-Hermitian atom-waveguide system composed of a tilted one-dimensional atomic array. We find the excitation of the collective atomic states concentrates in the middle interface, pointing towards the non-Hermitian skin effect.
  arXiv  Detail & Related papers  (2022-08-23T07:34:26Z)
• Tunable directional emission and collective dissipation with quantum metasurfaces [62.997667081978825]
  Subradiant excitations propagate through the atomic array with very long lifetimes. We demonstrate that one can harness these excitations to obtain tunable directional emission patterns. We also benchmark how these directional emission patterns translate into collective, anisotropic dissipative couplings.
  arXiv  Detail & Related papers  (2021-07-01T14:26:33Z)
• Tunable Anderson Localization of Dark States [146.2730735143614]
  We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system. We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes. The experiment opens the door to the study of various localization phenomena on a new platform.
  arXiv  Detail & Related papers  (2021-05-25T07:52:52Z)
• Time-resolved Interparticle Coulombic Decay spectra including nuclear degrees of freedom [49.1574468325115]
  We explore the ultra-rapid electronic motion spanning attoseconds to femtoseconds, demonstrating that it is equally integral and relevant to the discipline. The advent of ultrashort attosecond pulse technology has revolutionized our ability to directly observe electronic rearrangements in atoms and molecules.
  arXiv  Detail & Related papers  (2021-02-10T16:51:48Z)
• Single collective excitation of an atomic array trapped along a waveguide: a study of cooperative emission for different atomic chain configurations [0.0]
  Ordered atomic arrays trapped in the vicinity of nanoscale waveguides offer original light-matter interfaces. We study the decay dynamics of a single collective atomic excitation coupled to a waveguide in different configurations.
  arXiv  Detail & Related papers  (2021-01-14T00:01:06Z)
• Collective radiation from distant emitters [63.391402501241195]
  We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
  arXiv  Detail & Related papers  (2020-06-22T19:03:52Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)

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.