The topic of quantum noise has become extremely timely due to the rise of quantum
information physics and the resulting interchange of ideas between the condensed matter …

Mechanical systems are ideal candidates for studying quantum behavior of macroscopic
objects. To this end, a mechanical resonator has to be cooled to its ground state and its …

Quantum mechanics provides a highly accurate description of a wide variety of physical
systems. However, a demonstration that quantum mechanics applies equally to macroscopic …

Demonstrating and exploiting the quantum nature of macroscopic mechanical objects would
help us to investigate directly the limitations of quantum-based measurements and quantum …

In atomic laser cooling, preparation of the motional quantum ground state has been
achieved using resolved-sideband cooling of trapped ions. Here, we report the first …

Cold, macroscopic mechanical systems are expected to behave contrary to our usual
classical understanding of reality; the most striking and counterintuitive predictions involve …

When carrying out ultrasensitive continuous measurements of position, one must ultimately
confront the fundamental effects of detection back-action. Back-action forces set a lower …

Superconducting quantum interference devices (SQUIDs) are the most sensitive detectors of
magnetic flux 1 and are also used as quantum two-level systems (qubits) 2. Recent …

The field of optomechanics has emerged as leading platform for achieving quantum control
of macroscopic mechanical objects. Implementations of microwave optomechanics to date …

We analyze the quantum regime of the dynamical backaction cooling of a mechanical
resonator assisted by a driven harmonic oscillator (cavity). Our treatment applies to both …