Quantum light-matter interactions: sensing, communications, and information processing - 3Virtual room: COPL - 5
|Wednesday, May 27|
QT-3-27-1 / Overcoming noise in quantum communication with ultrafast temporal filtering
* Frédéric Bouchard, National Research Council Canada, Canada
Duncan England, National Research Council Canada
Philip J. Bustard, National Research Council Canada
Kate L. Fenwick, National Research Council Canada
Ebrahim Karimi, University of Ottawa
Khabat Heshami, National Research Council Canada
Benjamin Sussman, National Research Council Canada
We experimentally demonstrate a quantum communication scheme based on ultrafast optics techniques. Our scheme enables the realization of active signal filtering down to a single temporal mode, resulting in a dramatic increase in noise tolerance.
QT-3-27-2 / Extremal quantum states
* Luis Sanchez-Soto, Universidad Complutense de Madrid, Spain
QT-3-27-3 / Security from Interference
Hoi-Kwong Lo, University of Toronto, Canada
* Wenyuan Wang, University of Toronto, Canada
Single-photon and two-photon quantum interference effects play a fundamental role in the security of quantum key distribution (QKD). Indeed, we argue that measurement-device-independent (MDI-QKD) relies on two-photon interference whereas twin-field (TF)-QKD relies on single-photon interference. We review the recent developments in the theory and practice of MDI-QKD and TF-QKD.
QT-3-27-4 / Progress in Quantum Imaging
* Robert Boyd, University of Ottawa, Canada
Quantum imaging entails the use of quantum features of the light field to produce images that have higher spatial resolution and/or higher signal-to-noise ratios than images obtained through purely classical methods. Some recent results in this field are reported.
QT-3-27-5 / Polarization Entanglement from an Incoherent Pump
* Cheng Li, University of Ottawa, Canada
Boris Braverman, University of Ottawa
Girish Kulkarni, University of Ottawa
Robert Boyd, University of Ottawa
Entangled states of light are typically produced using spontaneous parametric down-conversion (SPDC) pumped by a coherent source. For temporal and spatial degrees of freedom, the down-converted light entanglement is limited by the pump coherence. However, there remains the question of whether the polarization entanglement is affected in the same way. We propose an experiment to investigate this matter, aiming to produce polarization-entangled photon pairs from a LED, an incoherent pump.