2002/05/31 by M. S. Shahriar, Prabhakar Pradhan, Jacob Morzinski +1 · 25 citations
Computer Science · Mathematics · Physics and Astronomy · #Bit (key) #Computer science #Excitation #Field (mathematics) #Interference (communication) #Mathematics #Phase (matter) #Physics #Pulse (music) #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum beats #Quantum decoherence #Quantum mechanics #Quantum optics and atomic interactions #Rotating wave approximation #Rotation (mathematics) #Statistical physics #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.69.032308
published in Physical Review A 69(3) (American Physical Society) · 4 pages, 2 figs
arxiv created 2002/07/20 · openalex publication_date 2004/03/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The need to maximize the number of operations of a quantum bit within its decoherence time may require the ratio of Rabi frequency to transition frequency to be large enough to invalidate the rotating-wave approximation. The state of the quantum bit under any initial condition then depends explicitly on the phase of the driving field, resulting in driver-phase-correlated fluctuations and a violation of the rule that the degree of excitation depends only on the pulse area. This is due to the interference of the excitations caused by the corotating and counterrotating fields, and is a significant source of error, correctable only by controlling the driver phase. We present a scheme for observing this effect under currently realizable parameters.