Quantum manipulation of macroscopic mechanical systems is of great interest in both
fundamental physics and applications ranging from high-precision metrology to quantum …

Quantum entanglement is a phenomenon whereby systems cannot be described
independently of each other, even though they may be separated by an arbitrarily large …

Quantum mechanics sets a limit for the precision of continuous measurement of the position
of an oscillator. We show how it is possible to measure an oscillator without quantum back …

Quantum entanglement of mechanical systems emerges when distinct objects move with
such a high degree of correlation that they can no longer be described separately. Although …

Heat engines convert thermal energy into mechanical work and generally involve a large
number of particles. We report the experimental realization of a single-atom heat engine. An …

Quantum states encoded in microwave photons or qubits can be effectively manipulated,
whereas optical photons can be coherently transferred via optical fibre and waveguide. The …

Converting low-frequency electrical signals into much higher-frequency optical signals has
enabled modern communication networks to leverage the strengths of both microfabricated …

The study of open quantum systems often relies on approximate master equations derived
under the assumptions of weak coupling to the environment. However when the system is …

Quantum illumination is a quantum-optical sensing technique in which an entangled source
is exploited to improve the detection of a low-reflectivity object that is immersed in a bright …

When two physical systems share the quantum property of entanglement, measurements of
one system appear to determine the state of the other. This peculiar property is used in …