A5054680967- Advanced X-ray Imaging Techniques
- Particle Accelerators and Free-Electron Lasers
- Advanced Electron Microscopy Techniques and Applications
- Advanced Frequency and Time Standards
- Crystallography and Radiation Phenomena
- Advanced Fiber Optic Sensors
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Cold Atom Physics and Bose-Einstein Condensates
Helmholtz-Zentrum Dresden-Rossendorf
2018-2021
Center for Integrated Quantum Science and Technology
2018-2021
Universität Ulm
2018-2021
We show that in order to guide waves, it is sufficient periodically truncate their edges. The modes supported by this type of wave propagate freely between the slits, and propagation pattern repeats itself. experimentally demonstrate general phenomenon for two types waves: (i) plasmonic waves propagating on a metal-air interface are blocked nanometric metallic walls, (ii) surface gravity water whose evolution recorded, packet truncated, generated again repeated patterns. This guiding concept...
In a quantum mechanical description of the free-electron laser (FEL) electrons jump on discrete momentum ladders, while they follow continuous trajectories according to classical description. order observe transition from dynamics, it is not sufficient that many levels are involved. Only if additionally initial spread electron beam larger than recoil, caused by emission and absorption photons, dynamics in phase space resembles one. Beyond these criteria, signatures averaged quantities like...
We derive an effective Dicke model in momentum space to describe collective effects the quantum regime of a free-electron laser (FEL). The resulting exponential gain from single passage electrons allows operation Quantum FEL high-gain mode and avoids experimental challenges X-ray oscillator. Moreover, we study intensity fluctuations emitted radiation which turn out be super-Poissonian.
We examine the experimental requirements for realizing a high-gain Quantum free-electron laser (Quantum FEL). Beyond fundamental constraints on electron beam and undulator, we discuss optimized interaction geometries, include coherence properties along with impact of diffraction, space-charge spontaneous emission. Based desired FEL properties, as well current capabilities, provide procedure determining corresponding set parameters. Even an idealized situation, combined emission put strong...
We have computed exactly the energy spectrum and corresponding wave functions of two bosonic particles, which are confined in a spherically symmetric shell-shaped trap interact with each other via three-dimensional zero-range potential. Confinement induced resonances (CIRs), originating entirely from strong coupling relative center-of-mass motions identified as avoided crossings at certain values shell radius. By working close to found CIRs, these results offer new way enhance atom-atom...
We solve the long-time dynamics of a high-gain free-electron laser in quantum regime. In this regime each electron emits at most one photon on average, independently initial field. contrast, variance statistics shows qualitatively different behavior for states find that realization seeded is more feasible than self-amplified spontaneous emission.