2006/08/31 by Sahel Ashhab, S. Ashhab, J. R. Johansson +1 · 3 citations
Computer Science · Mathematics · Physics and Astronomy · #Adiabatic process #Adiabatic quantum computation #Artificial intelligence #Computer science #Mathematics #Noise (video) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum decoherence #Quantum mechanics #Scalability #Scaling #Statistical physics #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physreva.74.052330
published as Phys. Rev. A 74, 052330 (2006) · 6 pages (two-column), 1 figure
openalex publication_date 2006/11/21 · arxiv created 2006/11/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the effects of decoherence on Landau-Zener crossings encountered in a large-scale adiabatic-quantum-computing setup. We analyze the dependence of the success probability---i.e., the probability for the system to end up in its new ground state---on the noise amplitude and correlation time. We determine the optimal sweep rate that is required to maximize the success probability. We then discuss the scaling of decoherence effects with increasing system size. We find that those effects can be important for large systems, even if they are small for each of the small building blocks.