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Q: Fachverband Quantenoptik und Photonik

Q 35: Quanteneffekte: QED / Interferenz und Korrelationen I

Q 35.6: Vortrag

Mittwoch, 4. März 2009, 15:15–15:30, VMP 6 HS-E

Momentum-space interferometry with trapped ultracold atoms — •Andreas Ruschhaupt¹, Adolfo del Campo², and J. Gonzalo Muga³ — ¹Institut für Mathematische Physik, TU Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig — ²Institute for Mathematical Sciences, Imperial College London, SW7 2PE, UK — ³Departamento de Quimica-Fisica, Universidad del Pais Vasco, Apartado 644, 48080 Bilbao, Spain

Quantum interferometers are generally set so that phase differences between paths in coordinate space combine constructive or destructively. Indeed, the interfering paths can also meet in momentum space leading to momentum-space fringes. We propose and analyze a method to produce interference in momentum space by phase-imprinting part of a trapped atomic cloud with a detuned laser. For one-particle wave functions analytical expressions are found for the fringe width and shift versus the phase imprinted. The effects of unsharpness or displacement of the phase jump are also studied, as well as many-body effects to determine the potential applicability of momentum-space interferometry.

Reference: arXiv:0810.1720