234 citations · 930 across the 17 of their papers we have counts for
16 papers · 1 filter
Optimal lossy quantum interferometry in phase space
Andrei B. Klimov, Marcin Zwierz, Sascha Wallentowitz +2
We analyse the phase space representation of the optimal measurement of a phase shift in an interferometer with equal photon loss in both its arms. In the local phase estimation sc…
Parameter estimation in the presence of the most general Gaussian dissipative reservoir
Marcin Jarzyna, Marcin Zwierz
We analyze the performance of quantum parameter estimation in the presence of the most general Gaussian dissipative reservoir. We derive lower bounds on the precision of phase esti…
Experimental Proof of Nonlocal Wavefunction Collapse for a Single Particle Using Homodyne Measurement
Maria Fuwa, Shuntaro Takeda, Marcin Zwierz +2
A single quantum particle can be described by a wavefunction that spreads over arbitrarily large distances, but it is never detected in two (or more) places. This strange phenomeno…
On quantum interferometric measurements of temperature
Marcin Jarzyna, Marcin Zwierz
We provide a detailed description of the quantum interferometric thermometer, which is a device that estimates the temperature of a sample from the measurements of the optical phas…
Einstein-Podolsky-Rosen steering and the steering ellipsoid
Sania Jevtic, Michael J. W. Hall, Malcolm R. Anderson +2
The question of which two-qubit states are steerable (i.e. permit a demonstration of EPR-steering) remains open. Here, a strong necessary condition is obtained for the steerability…
Precision bounds for noisy nonlinear quantum metrology
Marcin Zwierz, Howard M. Wiseman
We derive the ultimate bounds on the performance of nonlinear measurement schemes in the presence of noise. In particular, we investigate the precision of the second-order estimati…