Abstract
In this Letter, we demonstrate magnetogravitational matter-wave lensing as a novel tool in atom-optics in atomtronic waveguides. We collimate and focus matter waves originating from Bose-Einstein condensates and ultracold thermal atoms in ring-shaped time-averaged adiabatic potentials. We demonstrate "delta-kick cooling" of Bose-Einstein condensates, reducing their expansion energies by a factor of 46 down to 800pK. The atomtronic waveguide ring has a diameter of less than one millimeter, compared to other state-of-the-art experiments requiring zero gravity or free-flight distances of ten meters and more. This level of control with extremely reduced spatial requirements is an important step toward atomtronic quantum sensors.
Highlights
Recent years have witnessed the rise of quantum technologies from pure gedanken experiments to real applications
For Bose-Einstein condensates (BEC), this is caused by the self-interaction energy of the atoms and for thermal clouds, it is due to the velocity spread of the atoms
We introduce atomtronic matter-wave optics as a means to manipulate the density and momentum spread of BECs and ultracold thermal atomic clouds in ultrasmooth time-averaged adiabatic potentials (TAAPs) waveguides
Summary
Recent years have witnessed the rise of quantum technologies from pure gedanken experiments to real applications. We introduce atomtronic matter-wave optics as a means to manipulate the density and momentum spread of BECs and ultracold thermal atomic clouds in ultrasmooth TAAP waveguides.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
