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Departmental Colloquium

Quantum computing with Bose--Einstein condensate Bragg interferometry  
Guest Speaker
Dr. Mark Edwards  
Guest Affiliation
Georgia Southern University, Department of Physics  
Guest Affiliation Url  
Dr. Chad Fertig  
Thursday, September 9, 2010 4:00 pm - 5:00 pm  
Physics 202  

Quantum computers use the interferences of different computational paths to enhance correct outcomes. Quantum computation can be viewed as multi-particle computational interference [1].  I will describe how quantum circuits can be mapped to interferometry experiments performed on Bose-Einstein condensates (BECs) using Bragg pulses. I further describe an extension to an approach, originally developed to prototype Bragg interferometry of BECs [2], to describe new interferometers inspired by quantum information concepts. This approach follows ideas recently introduced in neutron inter- ferometry [3].  Using techniques that have been well calibrated by experiments in con- ventional BEC interferometry [2], experiments associated with some simple quantum circuits using the prototyping method mentioned above are modeled. We prototype ex- tensions to standard Mach-Zehnder configurations, analogous to the four-blade designs of neutron interferometry.
[1] R. Cleve, et al., Proc. R. Soc. Lond. A 454 339 (1998)
[2] J. E. Simsarian, et al., Phys. Rev. Lett. 85, 2040 (2000)
[3] D. A. Pushin, M. Arif, and D. G. Cory, Phys. Rev. A 79, 053635, (2009)