Light-based quantum technologies, such as quantum communication and photonic quantum computing, require reliable sources of individual photons and, ideally, pairs of entangled photons. Semiconductor ...

Quantum Markov semigroups provide a rigorous mathematical framework for describing the time‐continuous evolution of open quantum systems. These semigroups encapsulate the interplay between coherent ...

Researchers at the University of Waterloo have produced experimental evidence that quantum-level effects can alter the ...

A research team in China has built a quantum dot device that produces photon pairs with record-setting purity, achieving a two-photon fraction of 0.983(1). The work, published in Nature Materials, ...

Oracle-based quantum algorithms cannot use deep loops because quantum states exist only as mathematical amplitudes in Hilbert space with no physical substrate. Criticall ...

Quantum researchers have deployed a new algorithm to manage noise in qubits in real time. The method can be applied to a wide range of different qubits, even in large numbers. Noise is the "ghost in ...

Overview: Quantum computing has generated massive excitement for its potential to solve complex problems beyond the reach of classical computers.However, techni ...

What happens if you embed an ultrafast quantum computer inside a diamond (you know, aside from qualifying for sale in one of Tiffany’s catalogues and inviting “forever” computing quips)? Answer: You ...