Vacuum-mediated incoherent processes in coherently prepared media

Jörg Evers, Ulrich D. Jentschura, Mihai Macovei, Christoph H. Keitel

Research output: Contribution to journalConference article


We discuss various aspects of the incoherent spontaneous emission in atomic few-level systems arising from the coupling of the atom to the surrounding vacuum. First, we consider systems where the decoherence due to spontaneous emission acts as a limiting factor. Here, we combine collective effects in larger samples of atoms with control mechanisms known from single-atom schemes, or modify the system dynamics by externally inducing multiphoton quantum interference effects. In the second part, we discuss ground-state laser cooling of trapped atoms and ions. Here, the momentum transfer in the spontaneous emission events is required to cool the particles, but needs to be controlled in order to achieve a low cooling limit. In our scheme, we make use of double electromagnetically induced transparency in order to design the absorption spectrum of the trapped particle. In the final part, we show that the incoherent part of the resonance fluorescence spectrum of a two-level system may serve as an interesting candidate for high-precision spectroscopy. For this, we discuss relativistic and radiative corrections to the resonance fluorescence spectra of laser-driven few-level systems.

Original languageEnglish
Article number30
Pages (from-to)241-255
Number of pages15
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - Dec 12 2005
EventFluctuations and Noise in Photonics and Quantum Optics III - Austin, TX, United States
Duration: May 24 2005May 26 2005



  • Coherent control
  • Coherent processes
  • Collective effects
  • Incoherent processes
  • Interference
  • Laser cooling
  • Radiative and relativistic corrections
  • Resonance fluorescence
  • Spontaneous emission

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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