Experts from around the world will gather in Ottawa this week to discuss cybersecurity in a quantum world.
We develop a method for approximate synthesis of single--qubit rotations of the form e^{-i f(\phi_1,\ldots,\phi_k)X} that is based on the Repeat-Until-Success (RUS) framework for quantum circuit synthesis. We demonstrate how smooth computable functions, f, can be synthesized from two basic primitives. This synthesis approach constitutes a manifestly quantum form of arithmetic that differs greatly from the approaches commonly used in quantum algorithms.
I will discuss some new results we have recently obtained for the
problem of quantum states discrimination by Local Operations and
Join us for the next Quantum Frontiers Distinguished Lecture Series when Dr. Alain Aspect will talk about the weirdness of wave particle duality.
Nanowires offer exciting opportunities in quantum optics. Using quantum dots in semiconducting nanowires, we demonstrate the generation of single photons as well as pairs of entangled photons. Making electrical contacts to semiconducting nanowires, we make a single quantum dot LED where electroluminescence from a single quantum dot can be studied. Similar devices operated as photodiodes enable the operation of single nanowire avalanche photodiodes.
Quantum information is a very valuable, but also very fragile resource.
In this talk I want to present progress of our quantum optics laboratory. Our laboratory was built in the summer 2013. During the past year we've performed number of beautiful experiments. One of the featured experiments is "Quantum vampire" which demonstrates non-local properties of the annihilation operator. This beautiful effect predicts that if you take particular number of photons from the part of the light beam there will be now shadow.
New work asserts that a key technique used to probe quantum systems may not be so quantum after all, according to postdoctoral researcher Joshua Combes and his colleague Christopher Ferrie.
Over the past 20 years, a strange idea called a “weak value” has taken root in quantum information science.
From NIST Tech Beat: September 15, 2014
Researchers at the Institute for Quantum Computing at the University of Waterloo in Canada have directly entangled three photons in the most technologically useful state for the first time, thanks in part to superfast, super-efficient single-photon detectors developed by the National Institute of Standards and Technology (NIST).
1- Photon number discrimination without photon counting (theory and experiment)