DPG Phi
Verhandlungen
Verhandlungen
DPG

Hannover 2016 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 22: Quantum Gases: Bosons II

Q 22.3: Talk

Tuesday, March 1, 2016, 15:00–15:15, e001

Ramsey Interferometry with squeezed collective spin states under decoherence — •Björn Schrinski1, Stefan Nimmrichter2, and Klaus Hornberger11Fakultät für Physik, Universität Duisburg-Essen — 2Centre For Quantum Technologies, National University of Singapore

We discuss the non-unitary time evolution of number-squeezed collective spin states in Ramsey interferometry. We focus on decoherence models as proposed by the CSL model [1] or utilized by macroscopicity measures [2]. Exemplary experimental realisations are BEC superpositions with ultracold Rubidium atoms in double [3] and single-well [4] potentials. Our analytical results are based on a continuous-variables approach in the basis of Dicke states and are verified using exact numerical simulations in cases when the particle number is conserved.

[1] Bassi et al., Rev. Mod. Phys. 85, 471-527 (2013)

[2] Nimmrichter et al., Phys. Rev. Lett. 110, 160403 (2013)

[3] Berrada et al., Nat. Commun. 4, 2077 (2013)

[4] S. van Frank et al., Nat. Commun. 5, 4009 (2014)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2016 > Hannover