2008/07/04 by Jonas Johansson, J. Johansson, M. H. S. Amin +12
Computer Science · Physics and Astronomy · #Amplitude #Charge qubit #Condensed matter physics #Flux qubit #Landau quantization #Magnetic field #Noise (video) #Phase qubit #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum decoherence #Quantum electrodynamics #Quantum mechanics #Quantum tunnelling #Qubit #Squid #Standard linear solid model #Superconductivity #Voltage #Zener diode #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1103/physrevb.80.012507
published as Phys. Rev. B 80, 012507 (2009) · 4 pages, 4 figures
arxiv created 2008/07/04 · openalex publication_date 2009/07/21 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report an experimental measurement of Landau-Zener transitions on an individual flux qubit within a multiqubit superconducting chip. The method used isolates a single qubit, tunes its tunneling amplitude \ensuremathΔ into the limit where \ensuremathΔ is much less than both the temperature T and the decoherence-induced energy level broadening, and forces it to undergo a Landau-Zener transition. We find that the behavior of the qubit agrees to a high degree of accuracy with theoretical predictions for Landau-Zener transition probabilities for a double-well quantum system coupled to a nonMarkovian 1/f magnetic flux noise.