2012/10/30 by Os Vy, Xiaoting Wang, Kurt Jacobs · 2 citations
Computer Science · Physics and Astronomy · #Encoding (memory) #Flux qubit #Noise (video) #Phase qubit #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Qubit #Unitary state #quant-ph
paper · pdf · doi:10.1088/1367-2630/15/5/053002
published as New J. Phys. 15, 053002 (2013) · 7 pages, revtex4-1, 1 png figure
arxiv created 2012/10/30 · openalex publication_date 2013/05/07 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We observe that multi-body interactions, unlike two-body interactions, can implement any unitary operation on an encoded system in such a way that the evolution is uninterrupted by noise that the encoding is designed to protect against. Such 'error-transparent' evolution is distinct from that usually considered in quantum computing, as the latter is merely correctable. We prove that the minimum body-ness required to protect (i) a qubit from a single type of Pauli error, (ii) a target qubit from a controller with such errors and (iii) a single qubit from all errors is three-body, four-body and five-body, respectively. We also discuss applications to computing, coherent feedback control and quantum metrology. Finally, we evaluate the performance of error-transparent evolution for some examples using numerical simulations.