Theory - Quantum Information

Bare [[7,1,3]] code paper posted to arXiv

In this paper we present a [[7,1,3]] quantum error-correcting code that is able to achieve fault-tolerant syndrome measurement using one ancillary qubit per stabilizer. Our results on this [[7,1,3]] code demonstrates how physically motivated noise models may simplify fault-tolerent protocols.
The paper can be found at arXiv:1702.01155.

Errors and pseudothresholds for incoherent and coherent noise published in Physical Review A

 

In this paper, we study the distinctive effects that incoherent and coherent errors have on an encoded qubit.  We use the effective 1-qubit process matrix at the logical level to understand the fundamental differences between these kinds of errors.  Congratulations to Mauricio, Conor, Livia, and Smitha!

Special Topics in Quantum Information - Spring 2016

I forgot my camera on the last day of class.
 
In addition to fundamentals of quantum computation, a large part of the class dealt with surface codes.  Final projects covered a wide range of topics from implementation of quantum computation on ion traps to quantum algorithms based on random walks.
 
Students were from the following majors: CHEM, CHBE, CS, CSE, ECE, and PHYS,
 
Special thanks to Colin Trout for serving as the unofficial TA.

Errors and pseudothresholds for incoherent and coherent noise posted to the arXiv


In this paper, we study the distinctive effects that incoherent and coherent errors have on an encoded qubit.  We use the effective 1-qubit process matrix at the logical level to understand the fundamental differences between these kinds of errors.  The paper can be found at https://arxiv.org/abs/1605.03604.
 

EURIQA : Trapped ion logical qubit

EURIQA: Error-corrected Universal Reconfigurable Ion-trap Quantum Archetype

Aspen 2016

Aspen Presentation

Experimental implementation of Bernstein-Vazirani algorithm posted to the arXiv


The Quantum Systems Group at GTRI have demonstrated the Bernstein-Vazirani algorithm in a surface electrode trap.  The Brown lab provided theoretical support for the project. The paper is now posted on the arXiv.

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