Speaker
Ms
Sandra Eibenberger
(VCQ, University of Vienna)
Description
Sandra Eibenberger, Joseph Cotter, Xiaxi Cheng, Lukas Mairhofer, Markus
Arndt
University of Vienna, Faculty of Physics, VCQ, QuNaBioS, Vienna Austria
Molecular matter-wave interferometry has opened the path to delocalization
studies with ever more complex particles.
We report on the current mass record in quantum interference investigations
[1,2], and discuss the development of high-mass interference experiments.
We study the importance of internal molecular properties on the coherence in
a matter-wave interferometer. Tiny external forces can lead to fringe shifts
or dephasing of the molecular density pattern.
Properties such as electric polarizabilities and susceptibilities, electric
dipole moments as well as internal molecular dynamics become thus accessible
in molecule interferometry [3,4]. Recently, we have implemented the
measurement of an absolute molecular absorption cross section in our
Kapitza-Dirac-Talbot-Lau interferometer [5]. The recoil imparted on a
molecule when it absorbs a single photon from a probe laser beam leads to an
effective reduction in the quantum fringe visibility. This allows us to
extract the cross section with high accuracy and independent of the
molecular beam density.
[1] S. Eibenberger, S. Gerlich, M. Arndt, M. Mayor, and J. T?xen, Phys.
Chem. Chem. Phys. 15, 14696-14700 (2013).
[2] S. Gerlich, L. Hackerm?ller, K. Hornberger, A. Stibor, H. Ulbricht, M.
Gring, F. Goldfarb, T. Savas, M. M?ri, M. Mayor, and M. Arndt, Nature Phys.
3, 711 ? 715 (2007).
[3] M. Berninger, A. Stefanov, S. Deachapunya, and M. Arndt, Phys. Rev. A
76, 013607 (2007).
[4] S. Eibenberger, S. Gerlich, M. Arndt, J. T?xen, and M. Mayor, NJP 13,
043 033 (2011).
[5] S. Eibenberger, X. Cheng, J.P. Cotter, M. Arndt, arXiv:1402.5307
[quant-ph]
