Long spatial coherence times a few micro-meters from a room temperature surface

Abstract

The search for quantum coherence based on isolated atoms integrated with a room temperature solid state device (so-called atomchip [1-3]) has been intensifying in the last decade, with advances being made towards applications such as clocks, quantum information processing, surface probing and acceleration and gravitational field sensors. Such a device will also enable (and to some extent has already enabled) novel experiments in fundamental physics (e.g., [4-7]). Here we report on the trapping and maintenance of spatial coherence of atoms (in a Bose-Einstein Condensate -- BEC) about 5$\mu$m from a room temperature surface, reducing significantly the distance previously achieved between the spatially coherent atoms and their classical environment [8-12], and most importantly entering the regime where atomic circuits are enabled. In addition, we enter the interesting regime in which the distance to the surface is much smaller than the probed coherence length, a regime in which the spatial dephasing reaches its maximal rate.

References in corpus (8)

• Matter-wave interferometry in a double well on an atom chip
• Long Phase Coherence Time and Number Squeezing of two Bose-Einstein Condensates on an Atom Chip
• Long-Range Order in Electronic Transport through Disordered Metal Films
• Measuring Energy Differences by BEC Interferometry on a Chip
• Theoretical analysis of the implementation of a quantum phase gate with neutral atoms on atom chips
• Trapping cold atoms using surface-grown carbon nanotubes
• Using time reversal symmetry for sensitive incoherent matter-wave Sagnac interferometry
• Organized Current Patterns in Disordered Conductors