State measurements with short laser pulses and lower-efficiency photon detectors

@article{Beige1997StateMW,
  title={State measurements with short laser pulses and lower-efficiency photon detectors},
  author={Almut Beige and Gerhard C. Hegerfeldt},
  journal={Journal of Modern Optics},
  year={1997},
  volume={44},
  pages={345-357}
}
The use of a short probe laser pulse for state measurements of two-level systems has been proposed by Cook. In previous work we have investigated to what extent this proposal fulfills the projection postulate if ideal photon detectors are considered. For detectors with an overall efficiency of less than 1 complications arise for single systems, and for this case we present a simple criterion for a laser pulse to act as a state measurement and to cause an almost complete state reduction. 
4 Citations

Figures from this paper

Multi-photon entanglement from distant single photon sources on demand

We describe a scheme that allows for the generation of any desired N-photon state on demand. Under ideal conditions, this requires only N single photon sources, laser pulses and linear optics

Atomic cluster state build-up with macroscopic heralding

We describe a measurement-based state preparation scheme for the efficient build-up of cluster states in atom-cavity systems. As in a recent proposal for the generation of maximally entangled atom

The Quantum Jump Approach and Some of Its Applications

Modern techniques allow experiments on a single-driven atom or a single system. The quantum jump approach was originally developed for the description of the temporal development of such a driven

Atomic quantum zeno effect for ensembles and single systems

The so-called quantum Zeno effect is essentially a consequence of the projection postulate for ideal measurements. To test the effect, Itanoet al. have performed an experiment on an ensemble of atoms

References

SHOWING 1-10 OF 41 REFERENCES

On the photon statistics of the fluorescence radiation of a laser-driven single atom

The subject of the investigation are single atoms, for instance isolated in a Paul trap, which are driven by laser fields while their resonance radiation is measured by photon counters. For a rather

Atomic tests of the Zeno effect.

  • GagenMilburn
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1993
TLDR
This paper examines the simpler case where the measurement laser is continuously on and does not saturate the two-level atomic system, and gains insight into the operation of a particular measurement process by following the selective evolution of various systems using the quantum-trajectories approach.

Projection postulate and atomic quantum Zeno effect.

  • BeigeHegerfeldt
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1996
TLDR
Analytically it is shown that for a wide range of parameters such a short laser pulse acts as an effective level measurement to which the usual projection postulate applies with high accuracy, and the projections postulate is an excellent pragmatic tool for a quick and simple understanding of the slow-down of time evolution in experiments of this type.

Quantum Zeno effect.

TLDR
The quantum Zero effect is the inhibition of transitions between quantum states by frequent measurements of the state by means of pulses of light in an rf transition between two ground-state hyperfine levels.

Wave-function approach to dissipative processes in quantum optics.

TLDR
An alternative approach using a wave-function treatment to describe the atomic system and it is shown that this treatment is equivalent to the standard density matrix approach leading to the OBE's.

Conditional resonance-fluorescence spectra of single atoms.

  • HegerfeldtPlenio
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1996
TLDR
This paper generalizes the recent quantum jump approach to include resonance-fluorescence spectra of single atoms and shows that the spectrum of resonance fluorescence of the complete ensemble differs substantially from that observed in a light period.

Quantum Zeno effect without collapse of the wave packet.

  • FrerichsSchenzle
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1991
TLDR
The only experiment in which the Zeno effect has yet been clearly demonstrated, though, allows no conclusion on the necessity or validity of the projection postulate, as shown by calculating the outcome of the experiment on the basis of the standard three-level Bloch equations.

Stochastic simulations of the quantum Zeno effect.

  • PowerKnight
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1996
TLDR
Stochastic simulations of the quantum Zeno effect experiment of the type realized with trapped cooled ions provide a link between these two approaches, as they are compatible with each in the appropriate regime.

The Quantum Theory of Light

(b) Write out the equations for the time dependence of ρ11, ρ22, ρ12 and ρ21 assuming that a light field interaction V = -μ12Ee iωt + c.c. couples only levels |1> and |2>, and that the excited levels