Atomtronics: Ultracold Atom Analogs of Electronic Devices
Final rept. 30 Sep 2005-30 Sep 2006
COLORADO UNIV AT BOULDER DEPT OF PHYSICS
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Atomtronics focuses on atom analogs of electronic materials, devices and circuits. A strongly interacting ultracold Bose gas in a lattice potential is analogous to electrons in solid-state crystalline media. As a consequence of the band structure, cold atoms in a lattice can exhibit insulator or conductor properties. P-type and N-type material analogs can be created by introducing impurity sites into the lattice. Current through an atomtronic wire is generated by connecting the wire to an atomtronic battery which maintains the two contacts at different chemical potentials. The design of an atomtronic diode with a strongly asymmetric current-voltage curve exploits the existence of superfluid and insulating regimes in the phase diagram analog of a bipolar junction transistor. Our results provide the building blocks for more advanced atomtronic devices and circuits such as amplifiers. oscillators and fundamental logic gates.
- Electrical and Electronic Equipment
- Atomic and Molecular Physics and Spectroscopy