All posts tagged: quantum photonics

Technion scientists measure ultrafast quantum light pulses for the first time

Technion scientists measure ultrafast quantum light pulses for the first time

Published by Jenni Sidey

A light pulse is technically empty, yet capable of carrying a trillion photons in a single burst. That is part of what makes bright squeezed vacuum, or BSV, so strange. It is formally treated as a vacuum state of light, meaning its average electric field is zero. Yet in single shots, its quantum fluctuations can swell into extremely intense pulses. In the new Technion study, researchers finally pinned down how long those individual pulses last, and the answer lands deep in the ultrafast realm: about 27.2 femtoseconds. The work, published in Optica, comes from researchers at the Technion, Israel Institute of Technology, led by Dr. Michael Krüger and Ph.D. student Yuval Kern. The team also included Prof. Oren Cohen, Prof. Pavel Sidorenko, and Prof. Ido Kaminer, with contributions from Andrei Rasputnyi of the Max Planck Institute for the Science of Light in Erlangen, Germany. Dr. Michael Krüger (left) and Ph.D. student Yuval Kern. (CREDIT: Technion) A quantum pulse with a split personality Ordinary intense laser light, described as coherent-state light, has only weak quantum fluctuations. …

Scientists unlock scalable entanglement for next-generation quantum computing

Scientists unlock scalable entanglement for next-generation quantum computing

Published by Jenni Sidey

Light moving through a tiny silicon structure does not look dramatic. It slips down narrow waveguides etched onto a chip, guided by geometry too small to see with the naked eye. Yet in those channels, researchers at the University of Central Florida say they have found a way to build more complex quantum states of light without making the system itself more cumbersome. Their study, published in Science, centers on a problem that has lingered in quantum photonics. Entangled states of light can help power quantum computing and quantum sensing, but making those states both scalable and resistant to imperfections has been difficult. Andrea Blanco-Redondo, an optics and photonics professor at CREOL, the College of Optics and Photonics, said her group has now shown a method for entangling multiple topologically protected modes of light in silicon photonic superlattices. CREOL doctoral student Javad Zakeri while performing the photonic quantum experiments at UCF’s College of Optics and Photonics. (CREDIT: UCF) Where the robustness comes from Topological modes are unusual because they depend on the overall structure of …