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.

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 […]

Quantum caus…………ality in Nature Physics

Our article, A quantum advantage for inferring causal structure, by Katja Reid, Megan Agnew, Lydia Vermeyden, Dominik Janzing, Rob Spekkens, and Kevin Resch just appeared in Nature Physics. Giulio Chirabella wrote a News and Views piece on it entitled, Quantum information: Good causes.

Abstract: The problem of inferring causal relations from observed correlations is relevant […]

Hi Efcncy Sngl Phtn Bndwth Cmprsn in PRA

Our article, Theory of high-efficiency sum-frequency generation for single-photon waveform conversion, by John Donohue, Mike Mazurek, and Kevin Resch was just published in Physical Review A. The article studies the problem of single photon frequency conversion using sum-frequency generation, calculating how well the properties of the upconverted photon match a simpler first-order approximation.

Abstract: The […]