Critical metrology relies on the precise preparation of a system in its ground state near a
quantum phase transition point where quantum correlations get very strong. Typically, this …

Quantum systems of infinite dimension, such as bosonic oscillators, provide vast resources
for quantum sensing. Yet, a general theory on how to manipulate such bosonic modes for …

We predict that exploiting spin-orbit coupling in a harmonically trapped spinor quantum gas
can lead to scaling of the optimal measurement precision beyond the Heisenberg scaling …

Squeezing is essential to many quantum technologies and our understanding of quantum
physics. Here, we show a novel type of steady-state squeezing that can be generated in the …

It is commonly agreed that the electromagnetic vacuum is not empty but filled with virtual
photons. This leads to effects like Lamb shift and spontaneous emission. Here we argue that …

Quantum computation has long been dominated by a digital approach using the qubit, which
exists in a two-dimensional vector space, as its basic unit. More recently, there has been …