Quantum theory has been successfully validated in numerous laboratory experiments. But
would such a theory, which effectively describes the behavior of microscopic physical …

In the context of quantum technologies, the generation and manipulation of single photons
has become a key element for applications such as quantum communication and quantum …

Photonic quantum computing is one of the leading approaches to universal quantum
computation. However, large-scale implementation of photonic quantum computing has …

Linear optics underpins fundamental tests of quantum mechanics and quantum
technologies. We demonstrate a single reprogrammable optical circuit that is sufficient to …

Quantum simulators are controllable quantum systems that can be used to mimic other
quantum systems. They have the potential to enable the tackling of problems that are …

Over the past several decades, quantum information science has emerged to seek answers
to the question: can we gain some advantage by storing, transmitting and processing …

Universal quantum computers promise a dramatic increase in speed over classical
computers, but their full-size realization remains challenging. However, intermediate …

The first quantum technology that harnesses quantum mechanical effects for its core
operation has arrived in the form of commercially available quantum key distribution …

Linear optics with photon counting is a prominent candidate for practical quantum
computing. The protocol by Knill, Laflamme, and Milburn [2001, Nature (London) 409, 46] …

Multiphoton interference reveals strictly nonclassical phenomena. Its applications range
from fundamental tests of quantum mechanics to photonic quantum information processing …