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Entangled microwave radiation and its application in quantum illumination

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Date and time Jun 29, 2020
from 02:00 PM to 03:00 PM
Location Zoom link will be shared
Host Dvira Segal

Shabir Barzanjeh

Institute for Quantum Science and Technology (IQST), University of Calgary

The recent interest in mechanical quantum systems is driven not only by fundamental tests of quantum gravity but also to develop a new generation of hybrid quantum technologies.  Here I confirm the long-standing prediction that a parametrically driven mechanical oscillator can entangle electromagnetic fields. We observe stationary emission of path-entangled microwave radiation from a micro-machined silicon nanostring oscillator, squeezing the joint field operators of two thermal modes by 3.40(37)~dB below the vacuum level. This entanglement can be used to implement Quantum Illumination. Quantum illumination is a powerful sensing technique that employs entangled photons to boost the detection of low-reflectivity objects in environments with bright thermal noise. The promised advantage over classical strategies is particularly evident at low signal photon flux, a feature which makes the protocol an ideal prototype for non-invasive biomedical scanning or low-power short-range radar detection. In this work, we experimentally demonstrate quantum illumination at microwave frequencies. We generate entangled fields using a Josephson parametric converter at millikelvin temperatures to illuminate a room-temperature object at a distance of 1 meter in a proof of principle bistatic radar setup.

 



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