319 citations · 755 across the 7 of their papers we have counts for
7 papers
Discrete-to-continuous transition in quantum phase estimation
W. Rzadkowski, R. Demkowicz-Dobrzanski
We analyze the problem of quantum phase estimation where the set of allowed phases forms a discrete element subset of the whole interval, , $n=0,\dots N-1…
Adaptive quantum metrology under general Markovian noise
R. Demkowicz-Dobrzanski, J. Czajkowski, P. Sekatski
We consider a general model of unitary parameter estimation in presence of Markovian noise, where the parameter to be estimated is associated with the Hamiltonian part of the dynam…
Quantum Key Distribution with Qubits Encoded in Qutrit
R. Kumar, R. Demkowicz-Dobrzanski, K. Banaszek
We present a novel one-way quantum key distribution protocol based on 3-dimensional quantum state, a qutrit, that encodes two qubits in its 2-dimensional subspaces. The qubits hold…
Experimental generation of complex noisy photonic entanglement
K. Dobek, M. Karpinski, R. Demkowicz-Dobrzanski +2
We present an experimental scheme based on spontaneous parametric down-conversion to produce multiple photon pairs in maximally entangled polarization states using an arrangement o…
Multi-pass classical vs. quantum strategies in lossy phase estimation
Rafal Demkowicz-Dobrzanski
The use of classical multiple-pass approach for phase estimation which mimics the behavior of the N00N states, is compared with quantum techniques. It is shown that in the presence…
Experimental quantum-enhanced estimation of a lossy phase shift
M. Kacprowicz, R. Demkowicz-Dobrzanski, W. Wasilewski +2
When standard light sources are employed, the precision of the phase determination is limited by the shot noise. Quantum entanglement provides means to exceed this limit with the c…