# Collisional decoherence observed in matter wave interferometry.

@article{Hornberger2003CollisionalDO, title={Collisional decoherence observed in matter wave interferometry.}, author={Klaus Hornberger and Stefan Uttenthaler and Bj{\"o}rn Brezger and L. Hackerm{\"u}ller and Markus Arndt and Anton Zeilinger}, journal={Physical review letters}, year={2003}, volume={90 16}, pages={ 160401 } }

We study the loss of spatial coherence in the extended wave function of fullerenes due to collisions with background gases. From the gradual suppression of quantum interference with increasing gas pressure we are able to support quantitatively both the predictions of decoherence theory and our picture of the interaction process. We thus explore the practical limits of matter wave interferometry at finite gas pressures and estimate the required experimental vacuum conditions for interferometry…

## 203 Citations

Theory of decoherence in a matter wave Talbot-Lau interferometer (18 pages)

- Physics
- 2004

We present a theoretical framework to describe the effects of decoherence on matter waves in Talbot-Lau interferometry. Using a Wigner description of the stationary beam the loss of interference…

Decoherence Spectroscopy for Atom Interferometry

- Physics
- 2016

Decoherence due to photon scattering in an atom interferometer was studied as a function of laser frequency near an atomic resonance. The resulting decoherence (contrast-loss) spectra will be used to…

DECOHERENCE AND MATTER WAVE INTERFEROMETRY

- Physics
- 2008

A two-slit interference of a massive particle in the presence of environment-induced decoherence is theoretically analyzed. The Markovian Master equation, derived from coupling the particle to a…

Decoherence induced by stochastic background of gravitational waves on matter-wave interferometers

- Physics
- 2006

Stochastic backgrounds of gravitational waves correspond to intrinsic fluctuations of spacetime leading to a universal decoherence mechanism. This mechanism defines an ultimate limit for matter-wave…

Decoherence in a Talbot–Lau interferometer: the influence of molecular scattering

- Physics
- 2003

This work describes the interference of C70 fullerenes in a Talbot–Lau interferometer with a large separation between the diffraction gratings. This permits the observation of recurrences of the…

Dephasing in matter-wave interferometry

- Physics
- 2006

We review different attempts to show the decoherence process in double-slit-like experiments both for charged particles (electrons) and for neutral particles with permanent dipole moments.…

Decoherence in a Two Slit Diffraction Experiment with Massive Particles

- Physics
- 2007

Matter-wave interferometry has been largely studied in the last few years. Usually, the main problem in the analysis of the diffraction experiments is to establish the causes for the loss of…

Measurement of decoherence of electron waves and visualization of the quantum-classical transition.

- PhysicsPhysical review letters
- 2007

The experiment confirms the main features of the theory of decoherence and can be interpreted in terms of which-path information.

Ultimate decoherence border for matter-wave interferometry.

- PhysicsPhysical review letters
- 2006

A quantitative characterization of an ultimate decoherence border for matter-wave interferometry using larger and larger molecules is given in terms of figures involving the gravitational environment as well as the sensitivity of the interferometer to gravitational waves.

Collisional decoherence of polar molecules

- Physics
- 2016

The quantum state of motion of a large and rotating polar molecule can lose coherence through the collisions with gas atoms. We show how the associated quantum master equation for the center of mass…

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