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 metrology refers to the use of quantum resources in parameter-estimation
protocols, aiming at enhancing its precision. The quantum Fisher information is a key …

We carefully examine critical metrology and present an improved critical quantum metrology
protocol which relies on quenching a system exhibiting a superradiant quantum phase …

Quantum phase transition and quench dynamics in the Jaynes-Cummings model with
squeezed light are investigated. We find a special unitary transformation that removes the …

We present an alternative protocol allowing for the preparation of critical states that instead
of suffering from the critical slowing down benefits from the critical speeding up …

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 …

In quantum metrology, one typically creates correlations among atoms or photons to
enhance measurement precision. Here, we show how one can use other excitations to …

In this paper we show how the quantum mechanics of the inverted harmonic oscillator (IHO)
can be mapped to the quantum mechanics of a particle in a super-critical inverse square …

Superradiant phase transition and entanglement entropy in the Dicke model with a
squeezed light are investigated. We find a special rotation coordinate system mapping the …