Geometric perspective on quantum parameter estimation
Quantum metrology holds the promise of an early practical application of quantum
technologies, in which measurements of physical quantities can be made with much greater …
technologies, in which measurements of physical quantities can be made with much greater …
[HTML][HTML] Photonic quantum metrology
Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …
aim of this research field is the estimation of unknown parameters exploiting quantum …
Charging quantum batteries via indefinite causal order: Theory and experiment
In the standard quantum theory, the causal order of occurrence between events is
prescribed, and must be definite. This has been maintained in all conventional scenarios of …
prescribed, and must be definite. This has been maintained in all conventional scenarios of …
Entangled photon-pair sources based on three-wave mixing in bulk crystals
Entangled photon pairs are a critical resource in quantum communication protocols ranging
from quantum key distribution to teleportation. The current workhorse technique for …
from quantum key distribution to teleportation. The current workhorse technique for …
Nonlinearity-enhanced quantum sensing in Stark probes
Stark systems in which a linear gradient field is applied across a many-body system have
recently been proposed for quantum sensing. Here, we explore sensing capacity of Stark …
recently been proposed for quantum sensing. Here, we explore sensing capacity of Stark …
Stark localization as a resource for weak-field sensing with super-Heisenberg precision
Gradient fields can effectively suppress particle tunneling in a lattice and localize the wave
function at all energy scales, a phenomenon known as Stark localization. Here, we show …
function at all energy scales, a phenomenon known as Stark localization. Here, we show …
Simulating exceptional non-Hermitian metals with single-photon interferometry
K Wang, L **
T Wimmer, M Althammer, L Liensberger, N Vlietstra… - Physical Review Letters, 2019 - APS
Applications based on spin currents strongly rely on the control and reduction of their
effective dam** and their transport properties. We here experimentally observe magnon …
effective dam** and their transport properties. We here experimentally observe magnon …
Free-fermionic topological quantum sensors
Second order quantum phase transitions, with well-known features such as long-range
entanglement, symmetry breaking, and gap closing, exhibit quantum enhancement for …
entanglement, symmetry breaking, and gap closing, exhibit quantum enhancement for …