Using light to process quantum information is one of the most promising approaches to building future quantum computers.

Quantum computers work by applying quantum operations, such as quantum gates, to delicate quantum states. Ideally, quantum computers can solve complex equations at staggeringly fast speeds that vastly ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Quantum computing was once considered a distant scientific project that could revolutionize ...

Optical quantum computers are gaining attention as a next-generation computing technology with high speed and scalability. However, accurately characterizing complex optical processes, where multiple ...

Zulfi Alam thinks his team doesn’t need to “prove” they engineered a new state of matter in their bid to reinvent computing.

IBM and collaborators say their quantum computers outperform all known classical algorithms for three distinct tasks, but ...

For decades, computers have become faster, smaller, and more powerful. But even the world’s best supercomputers have limits. Some calculations would take them thousands or even millions of years to ...

IN 2013 GOOGLE and NASA, America’s space agency, launched a quantum computing lab. The idea was to use a specialised quantum computer built by D-Wave, a Canadian firm, to improve the onerous task of ...

There are many algorithms for which it has been mathematically proven that a quantum computer can generate results that would ...

Quantum process characterization encompasses a suite of diagnostic methods that quantify and reconstruct the transformation enacted by quantum hardware on qubits. As devices scale beyond a handful of ...

Overview of compilation-based quantum process tomography (CQPT). The left panel shows the main idea: an unknown quantum process transforms an input state into an output state, and CQPT uses a ...