Dr. Panos Aliferis

California Institute of Technology
Pasadena, CA 91125

Progress in fault-tolerant quantum computation: simple proofs, sub-system codes and slow measurements

I will first give an overview of proofs of the quantum threshold theorem in light of the significant progress that has recently been made on extending the limits of its applicability. After this general overview, I will discuss the benefits of the Bacon-Shor sub-system code [2] for improving the overhead and the accuracy threshold for fault-tolerant quantum computation [3]. Finally, I will present results showing that slow quantum measurement has a very minor effect on the accuracy threshold of solid-state implementations of quantum computing [4].

[1] Aliferis, Gottesman, and Preskill, ``Quantum accuracy threshold for concatenated distance-3 codes,'' Quantum Inf. Comp. 6 (2) (2006)97--165; quant-ph/0504218
[2] Bacon, ``Operator Quantum Error Correcting Subsystems for Self-Correcting Quantum Memories,'' Phys. Rev. A 73 (2006) 012340; quant-ph/0506023
[3] Aliferis and Cross, ``Sub-system fault tolerance with the Bacon-Shor code,'' quant-ph/0610063.
[4] DiVincenzo and Aliferis, ``Effective fault-tolerant quantum computation with slow measurements,'' quant-ph/0607047.

Seminar schedule: http://www.physics.rutgers.edu/qcg/Seminars.html