Place an elastic ball in a box and shake it. What is the total energy of the ball? In classical physics, it can be any number which depends on how hard you shook. Shake a tiny bit harder and you’ll add a tiny bit more energy. Bound quantum systems behave Read more…
Simon Benjamin was recently featured on the Y Combinator blog, a seed accelerator which has seeded companies like Dropbox, Airbnb, Reddit and Twitch. In the episode, which you can view here, Simon discusses the different approaches for constructing and scaling a quantum computer.
“Imaginary time is a genuine scientific concept. One can picture it in the following way. One can think of ordinary, real, time as a horizontal line. On the left, one has the past, and on the right, the future. But there’s another kind of time in the vertical direction. This Read more…
These days, a lot of groups are trying to fabricate small sized quantum circuits with tens of qubits, and some useful algorithms to use them are proposed. To make the best of such circuits, we have to suppress the noise in the quantum circuits and we have proposed useful error Read more…
Simulation is crucial to many sciences. We simulate cosmic events before we spy them in the skies. We simulate molecular dynamics to inform our synthesis of new drugs. We simulate electronic circuits before we build them, and quantum circuits are no exception. But simulating a quantum circuit is especially difficult. Read more…
In recent years, quantum computation has become a hot word in the scientific world and has gradually enterered public view. While quantum computer prototypes have been developed with amazing speed, one should never ignore that they are formed with imperfect controls. Quantum error correction offers a solution: each ‘logical qubit’ is Read more…
We’ve brought over the news posts from qunat.org – the previous home of the research group. You can read these posts after this one.
Many researchers believe that the best way to make a quantum computer is to interlink many small modules. But what does “small” mean? In particular, will be quantum machine be more powerful (or perhaps, more resistant to errors) if it each module is itself a powerful device with 100’s of qubits? Read more…
The process called quantum annealing is a hot topic! We’ve posted a preprint which extents recent ideas from an Innsbruck team, for realising such a technology in a powerfully flexible form. The word ‘annealing’ usually refers to a process where a metal is heated and slowly cooled (see image). But in quantum annealing a system is slowly Read more…
A new project on Quantum Optimisation and Machine Learning “QuOpaL” is now underway. Based at the University of Oxford, it’s a joint endeavour between the University, Nokia and Lockheed Martin. The aim of the project is to understand the potential for quantum technology to enhance optimisation and machine learning tasks Read more…