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Quantum information is problem solving and data processing using a quantum system as the information carrier, rather than binary ‘1’s and ‘0’s used in conventional computation. Quantum information systems could be able to transmit data that is fundamentally secure and solve problems that are beyond the power of modern computers.
Topological quantum computers are predicted to perform calculations by manipulating quasiparticles known as non-Abelian anyons. A type of non-Abelian anyon that supports universal quantum gates has now been simulated using superconducting qubits.
A gas of molecules that interact over long distances has been cooled to mere nanokelvins, resulting in the emergence of a state known as a Bose–Einstein condensate — the first of its kind in this type of molecular system.
Improving the performance and scalability of quantum nodes is of paramount importance to expedite the development of quantum technologies. Here the authors demonstrate fiber-coupled 1D PhC cavities with high photon extraction efficiency, and optical coupling between a single SiV center and such a cavity.
Error mitigation has helped improve the performance of current quantum computing devices. Now, a mathematical analysis of the technique suggests its benefits may not extend to larger systems.
Topological quantum computers are predicted to perform calculations by manipulating quasiparticles known as non-Abelian anyons. A type of non-Abelian anyon that supports universal quantum gates has now been simulated using superconducting qubits.
A gas of molecules that interact over long distances has been cooled to mere nanokelvins, resulting in the emergence of a state known as a Bose–Einstein condensate — the first of its kind in this type of molecular system.
The rotation of holes jumping between quantum dots in silicon quantum computers creates additional complexity for two-qubit operations. Understanding the rules of this somersaulting movement is key to the progress of hole-based qubit technology.
Access to quantum computers has been democratized by the availability of cloud services from commercial providers, but the numbers of qubits users can exploit have remained modest, limited by noise and errors. What are these qubits used for and what can we expect next?
Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.