Introduction

We are an experimental quantum optics group run by Kevin Resch, based in the Department of Physics & Astronomy and the Institute for Quantum Computing at the University of Waterloo.

Ultrafast quantum interference in PRA

The paper Ultrafast quantum interferometry with energy-time entangled photons by JP MacLean, John Donohue, and Kevin Resch was published in Physical Review A.

Abstract: Many quantum advantages in metrology and communication arise from interferometric phenomena. Such phenomena can occur on ultrafast timescales, particularly when energy-time entangled photons are employed. These have been relatively unexplored as […]

Ultrafast Quantum Optics results in PRL

We have a new paper, Direct Characterization of Ultrafast Energy-Time Entangled Photon Pairs, by JP MacLean, John Donohue, and Kevin Resch that just appeared in Physical Review Letters. It was selected as an Editors’ Suggestion and Featured in a Synopsis in Physics.

Abstract: Energy-time entangled photons are critical in many quantum optical phenomena and have […]

Causal relations get coherent in Nature Communications

Our paper, Quantum-coherent mixtures of causal relations, by JP MacLean, Katja Ried, Rob Spekkens and Kevin Resch was published today in Nature Communications. This work was the result of a collaboration between the Quantum Optics and Quantum Information group at the University of Waterloo (IQC/Physics) and the Perimeter Institute.

Abstract: Understanding the causal influences that […]

Triple play in PRL

Our article, Observation of Genuine Three-photon Interference, by Sascha Agne, Thomas Kauten, Jeongwan Jin, Evan Meyer-Scott, Jeff Z. Salvail, Deny R. Hamel, Kevin J. Resch, Gregor Weihs, and Thomas Jennewein was published in Physical Review Letters. This work was a collaboration between groups at IQC and the University of Innsbruck. The paper was discussed as […]

EtnnteamnegllgennmaetnntE to EEnnttaanngglleemmeenntt in PRL

Our paper, Spectrally Engineering Photonic Entanglement with a Time Lens, by John Donohue, Morgan Mastrovich, and Kevin Resch was published in Physical Review Letters. The PRL paper can be found here and a preprint is on the arXiv.

Abstract: A time lens, which can be used to reshape the spectral and temporal properties of […]

Quantum interference mediated by diamond phonons in PRL

Our paper, Phonon-Mediated Nonclassical Interference in Diamond, by Duncan England, Kent Fisher, Jean-Philippe MacLean, Philip Bustard, Khabat Heshami, Kevin Resch, and Benjamin Sussman was published in Physical Review Letters. This work is the result of a collaboration with Ben Sussman’s Quantum Technologies Laboratory at the National Research Council Canada.

Abstract: Quantum interference of single photons […]

Ph+otons Vs. Photo+ns in Nature Communications

Our article, An experimental test of noncontextuality without unphysical idealizations, by Mike Mazurek, Matt Pusey, Ravi Kunjwal, Kevin Resch, and Rob Spekkens was just published in Nature Communications. This work is the result of a collaboration between IQC and the Perimeter Institute on Experimental Quantum Foundations.

Abstract: To make precise the sense in which […]

New Nature Communications on photon waveform conversion in diamond

Our new article Frequency and bandwidth conversion of single photons in a room-temperature diamond quantum memory by K.A.G. Fisher, D.G. England, J.-P.W. MacLean, P.J. Bustard, K.J. Resch, and B.J. Sussman was published in Nature Communications. The work is the result of our collaboration with Ben Sussman’s Quantum Technology group at the National Research Council of […]

Non…Trajec in Science Advances local…tories

Our article, Experimental nonlocal and surreal Bohmian trajectories, by D. H. Mahler, L. Rozema, K. Fisher, L. Vermeyden, K.J. Resch, H.M. Wiseman, and A. Steinberg was published in Science Advances. The work is the result of a collaboration between the University of Toronto, Griffith University, and University of Waterloo.

Abstract: Weak measurement allows one to […]

Photon Icqubit published in PRL

Our article, Certifying the Presence of a Photonic Qubit by Splitting It in Two, by Evan Meyer-Scott, Daniel McCloskey, Klaudia Gołos, Jeff Z. Salvail, Kent A. G. Fisher, Deny R. Hamel, Adán Cabello, Kevin J. Resch, and Thomas Jennewein just appeared in Physical Review Letters. The paper was chosen as an Editors’ Suggestion.

Abstract: We […]