Theory - Quantum Information

Robust FM 2-Qubit Gate For Ion Traps - Posted to ArXiv

We have developed a novel method for optimizing two-qubit gate in a trapped ion chain by frequency modulation. The method has been experimentally demonstrated in Chris Monroe's group at JQI and shown to have ~98% fidelity and robust against frequency errors over 1kHz in a 5-ion trap. The paper is now on the arXiv: 1708.08039

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

Syndicate content