2014/10/21 by John M. Martinis, A. Megrant, Martinis, John M. +1 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Superconductivity (cond-mat.supr-con) #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.48550/arxiv.1410.5793
10 pages, 1 figure
arxiv created 2014/10/21 · openalex publication_date 2014/10/21 · arxiv updated 2014/10/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We review progress at UCSB on understanding the physics of decoherence in superconducting qubits. Although many decoherence mechanisms were studied and fixed in the last 5 years, the most important ones are two-level state defects in amorphous dielectrics, non-equilibrium quasiparticles generated from stray infrared light, and radiation to slotline modes. With improved design, the performance of integrated circuit transmons using the Xmon design are now close to world record performance: these devices have the advantage of retaining coherence when scaled up to 9 qubits.