Homodyne Measurement Why is it so important and how we can make it better

by Avi Pe'Er

at Special seminar

Tue, 23 May 2017, 10:00
Nanotechnology institute building (#51) room 15


Homodyne measurement is a corner stone of quantum optics It measures the fundamental variables of quantum electrodynamics the quadratures of light which represent the cosine wave and sine wave components of an optical field and constitute the quantum optical analog of position and momentum Yet standard homodyne which is used to measure the quadrature information suffers from a severe bandwidth limitation: While the bandwidth of optical states can easily span many THz standard homodyne detection is inherently limited to the electrically accessible MHz to GHz range leaving a dramatic gap between the relevant optical phenomena and the measurement capability We demonstrate a fully parallel optical homodyne measurement across an arbitrary optical bandwidth effectively lifting this bandwidth limitation completely Using optical parametric amplification which amplifies one quadrature while attenuating the other we measure two mode quadrature squeezing of 1 5dB below the vacuum level simultaneously across a bandwidth of 55THz using just one local oscillator the pump This broadband parametric homodyne measurement opens a wide window for parallel processing of quantum information

Created on 17-05-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 17-05-2017 by Bar Lev, Yevgeny (ybarlev)