An On-chip Homodyne Detector for Measuring Quantum States and Generating Random Numbers
arXiv:1612.04676 · doi:10.1088/2058-9565/aaa38f
Abstract
Optical homodyne detection has found use in a range of quantum technologies as both a characterisation tool and as a way to post-selectively generate non-linearities. So far optical implementations have been limited to bulk optics. Here we present the first homodyne detector fully integrated with silicon photonics and suitable for measurements of the quantum state of the electromagnetic field. This high speed, compact detector shows low noise operation, with 10 dB of clearance between shot noise and electronic noise, up to a speed of 160 MHz. These performances are suitable for on-chip characterisation of optical quantum states, such as Fock or squeezed states. As a first application, we show the generation of quantum random numbers at 1.2 Gbps generation rate. The produced random numbers pass all the statistical tests provided by the NIST statistical test suite.
5 pages, 4 figures, 1 table
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