2009/06/30 by Shwetank Kumar, David P. DiVincenzo
Computer Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Circuit quantum electrodynamics #Computer science #Detector #Kerr effect #Kerr nonlinearity #Mechanical and Optical Resonators #Microwave #Noise (video) #Nonlinear system #Optics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum electrodynamics #Quantum mechanics #Resonator #Responsivity #SIGNAL (programming language) #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevb.82.014512
12 pages, 4 figures
arxiv created 2010/02/14 · openalex publication_date 2010/07/09 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a scheme for dispersive readout of stored energy in one mode of a nonlinear-superconducting microwave ring resonator by detection of the frequency shift of a second mode coupled to the first via a Kerr nonlinearity. Symmetry is used to enhance the device responsivity while minimizing self-nonlinearity of each mode. Assessment of the signal to noise ratio indicates that the scheme will function at the single-photon level, allowing quantum nondemolition measurement of the photon-number state of one mode. Experimental data from a simplified version of the device demonstrating the principle of operation are presented.