Article by Raksha Singla The intrinsic characteristics of quantum computer hardware introduce a probabilistic element to their behavior. You’ve likely encountered this explanation repeatedly, and it essentially signifies that when an input state undergoes processing in a quantum circuit, the resulting output state is very well defined by state evolution formula, but its measurement is probabilistic. Instead of getting access to the result of the calculation, as one would expect in classical computing, one obtain one measurement of this output state, the specific measurement following a pr ..read more

Article by Lucija Grba Linear optical quantum computation uses photons as carriers of information (i.e. qubits) in an optical circuit with beam splitters and phase shifters that process this information. You can read more about how optical quantum computing works here. Let different outputs of an optical quantum circuit correspond to different spending models one can obtain with a specific number of photons corresponding to their limited budget. Naturally, the more spending models we have access to, the more options we have to choose from and therefore have a higher likelihood of mak ..read more

Article by Ben Stott Quantum computing is at the forefront of technology, with the potential to transform how we process information. This emerging field leverages quantum phenomena such as quantum superposition and entanglement to accomplish computational tasks at unprecedented speeds. Among the different strategies for achieving quantum computing, photonic quantum computing is a particularly bright star. Photonic quantum computing uses light particles — photons — as the carrier quantum information. This approach has many benefits ; photons are stable, they have modest cooling ..read more

Article by Niccolo Somaschi & Pascale Senellart The scientific results just published in the new issue of the journal Nature Photonics represents another “first” in the technological achievements of the quantum computing company Quandela, towards the development of photonic quantum computers. Within a collaborative effort, several academic research groups (Pascale Senellart at C2N-CNRS, Sophia Economou at Virginia Tech (USA), Alexia Auffeves at CNRS Grenoble) and the teams in Quandela demonstrate the deterministic generation of a linear cluster state of entangled photons, with a semiconduc ..read more

Article by Filipa Carvalho, Rawad Mezher & Shane Mansfield 1 — Introduction (non-technical summary) The huge promise offered by quantum computers has led to a surge in theoretical and experimental research in quantum computing, with the goal of developing and optimising quantum hardware and software. Already, many small-scale quantum devices (known commonly as quantum processing units or QPUs) are now publicly available via cloud access worldwide. A few weeks ago, we were delighted to announce Quandela’s first QPU with cloud access — Ascella — a milestone achievement and the first of its k ..read more

Article by Jason MuellerPart 1: Quantum simulations Quantum computing is a computational paradigm which encodes information into quantum systems called qubits. These qubits are manipulated using superposition and entanglement to achieve a computational advantage over classical computers. In particular, photonic qubits are one of the most promising quantum-computer technologies [1], with billions invested across the world. As the field continues to evolve quickly, the need to efficiently simulate the calculations performed by quantum circuits becomes evermore pressing. Perceval, the softwa ..read more

Article by Patrick Sinnott Machine Learning Over the last decade, machine learning (ML) and Artificial Intelligence (AI) have dominated the information-technology landscape, to the degree where most enterprises use ML-powered solutions. Here are a few examples you may be familiar with: Virtual assistants like Siri or Alexa use ML to analyse speech patterns. The proposed self-driving cars of Google and Tesla are the essence of ML, studying and reproducing the behaviour of a human driver. Translation apps are built from a marriage of machine learning and linguistic rule creation ..read more

Article by Liam Lysaght One of my fondest childhood memories is enjoying the sweet, delicious taste of a large-scale fault tolerant quantum computer. In this article, we’re going to explain how you can bake your own scrumptious quantum processor from scratch. Whether you’re trying to impress a first date, cater for friends, or entrench a technological advantage against your geopolitical rivals, quantum computers are the perfect treat for any occasion. Difficulty: Extreme Cooking time: 5–7 years of R&D In our last article, we answered the question “What is a Quantum Computer?”. As ..read more