UVA HOME  |  CONTACT US  |  MAP
 
Support UVa's Physics Department! >>
Click here for a printable version of this page.

Atomic Physics Seminars This Term

ics Atomic
Monday, January 22, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, January 29, 2018
3:30 PM
Physics Building, Room 204
Zack Carson [Host: Olivier Pfister]
UVA - Department of Physics
"Leveraging qumode scalability: increased squeezing and entanglement from redistributed multitudinous-mode squeezing"
ABSTRACT:

Quantum computing harnesses purely non-classical features of quantum physics to perform computations that would be otherwise infeasible on a traditional (classical) computer. Highly squeezed states are a crucial resource for many quantum technologies, primarily fault tolerant quantum computing. As with any quantum resource, squeezing is very fragile and arduous to generate experimentally. Because of this, the 20.5 dB squeezing level germane to the fault tolerance threshold (for an error rate of 0.00001) of continuous variable (CV) quantum computing has yet to be obtained, despite recent progress. I propose an experimental method designed to breach this threshold by unitarily redistributing multitudinous-mode squeezing into a highly squeezed single qumode (the CV analog of a qubit, or quantum bit). This new paradigm utilizes multi-mode states as a squeezing resource, by effectively transferring small levels of squeezing per qumode over N modes into a single qumode with N-times the squeezing.

ics Atomic
Monday, February 5, 2018
3:30 PM
Physics Building, Room 204
Reserved for Special Colloquium
ics Atomic
Monday, February 12, 2018
3:30 PM
Physics Building, Room 204
Reserved for Special Colloquium
ics Atomic
Monday, February 19, 2018
3:30 PM
Physics Building, Room 204
Reserved for Special Colloquium
ics Atomic
Monday, February 26, 2018
3:30 PM
Physics Building, Room 204
Erling Riis [Host: Cass Sackett]
University of Strathclyde
"Clocks and interferometers with cold atoms"
ABSTRACT:

The use of cold atoms has led to a substantial increase in the accuracy achievable in many atomic physics measurements. This has most notably been demonstrated in the atomic clock relying on the interference of internal states of weakly interacting atoms in free fall. However, it has also led to an additional layer of experimental complexity which, combined with the physical size of state-of-the-art setups, impose significant limitations on wider practical applications. Progress will be reported on the development of a compact atomic clock based on cold atoms. 

Unprecedented precision has also been demonstrated in atom interferometers relying on the  detection of differential phase shifts between atomic wavefunctions of e.g. different motional states. Sensitivity to external interactions results in a shift of the atomic phase relative to a lab-frame reference, typically the spatial phase of an optical standing wave. This is a limitation to practical measurements as it requires long temporal stability and has motivated the investigation of an atom interferomenter inherently insensitive to the phase noise of the readout system. This relies on an atomic homodyne detection allowing the entire interferometric signal to be read out in a single shot.

ics Atomic
Monday, March 12, 2018
3:30 PM
Physics Building, Room 204
Cristiana Principato [Host: Craig Group]
UVA-Department of Physics
"TBA"
ics Atomic
Monday, March 19, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, March 26, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, April 2, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, April 9, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, April 16, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, April 23, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, April 30, 2018
3:30 PM
Physics Building, Room 204

"Available"
Atomic Physics Seminars
Tom Gallagher (Chair)

To add a speaker, send an email to tfg@Virginia.EDU Include the seminar type (e.g. Atomic Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available). [Please send a copy of the email to phys-speakers@Virginia.EDU.]