Browse/search for people

Publication - Dr Jake Kennard

    A Homodyne Detector Integrated onto a Photonic Chip for Measuring Quantum States and Generating Random Numbers

    Citation

    Raffaelli, F, Ferranti, G, Mahler, D, Sibson, P, Kennard, J, Santamato, A, Sinclair, G, Bonneau, D & Matthews, J, 2018, ‘A Homodyne Detector Integrated onto a Photonic Chip for Measuring Quantum States and Generating Random Numbers’. Quantum Science and Technology, vol 3.

    Abstract

    Optical homodyne detection has found use as a characterization tool in a range of quantum; technologies. So far implementations have been limited to bulk optics. Here we present the optical; integration of a homodyne detector onto a silicon photonics chip. The resulting device operates; at high speed, up 150 MHz, it is compact and it operates with low noise, quantified with 11 dB; clearance between shot noise and electronic noise. We perform on-chip quantum tomography of; coherent states with the detector and show that it meets the requirements for characterising more; general quantum states of light. We also show that the detector is able to produce quantum random; numbers at a rate of 1.2 Gbps generation rate, by measuring the vacuum state of the electromagnetic; field-the produced random numbers pass all the statistical tests provided by the NIST statistical; test suite.

    Full details in the University publications repository