2008/06/19 by Jian Li, K. Chalapat, K Chalapat +2
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Information and Cryptography #Quantum Mechanics and Applications #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1088/1742-6596/150/2/022051
published as J. Phys.: Conf. Ser. 150, 022051 (2009). · 4 pages, 2 figures
arxiv created 2008/06/19 · openalex publication_date 2009/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We study the problem of two superconducting quantum qubits coupled via a resonator. If only one quanta is present in the system and the number of photons in the resonator is measured with a null result, the qubits end up in an entangled Bell state. Here we look at one source of errors in this quantum nondemolition scheme due to the presence of more than one quanta in the resonator, previous to the measurement. By analyzing the structure of the conditional Hamiltonian with arbitrary number of quanta, we show that the scheme is remarkably robust against these type of errors. PACS:03.67.Lx,85.25.Cp,74.50.+r