773 citations · 2.5k across the 19 of their papers we have counts for
19 papers
Multiparameter estimation perspective on non-Hermitian singularity-enhanced sensing
Javid Naikoo, Ravindra W. Chhajlany, Jan Kolodynski
Describing the evolution of quantum systems by means of non-Hermitian generators opens a new avenue to explore the dynamical properties naturally emerging in such a picture, e.g. o…
Preserving quantum correlations and coherence with non-Markovianity
Marek Miller, Kang-Da Wu, Manfredi Scalici +5
Open quantum systems exhibit a rich phenomenology, in comparison to closed quantum systems that evolve unitarily according to the Schrödinger equation. The dynamics of an open quan…
Noisy atomic magnetometry in real time
Julia Amoros-Binefa, Jan Kolodynski
Continuously monitored atomic spin-ensembles allow, in principle, for real-time sensing of external magnetic fields beyond classical limits. Within the linear-Gaussian regime, than…
Geometric approach to quantum statistical inference
Marcin Jarzyna, Jan Kolodynski
We study quantum statistical inference tasks of hypothesis testing and their canonical variations, in order to review relations between their corresponding figures of merit---measu…
Discrimination and estimation of incoherent sources under misalignment
J. O. de Almeida, J. Kołodyński, C. Hirche +2
Spatially resolving two incoherent point sources whose separation is well below the diffraction limit dictated by classical optics has recently been shown possible using techniques…
Entanglement negativity as a universal non-Markovianity witness
Jan Kolodynski, Swapan Rana, Alexander Streltsov
In order to engineer an open quantum system and its evolution, it is essential to identify and control the memory effects. These are formally attributed to the non-Markovianity of…
Device-independent quantum key distribution with single-photon sources
Jan Kołodyński, Alejandro Máttar, Paul Skrzypczyk +4
Device-independent quantum key distribution protocols allow two honest users to establish a secret key with minimal levels of trust on the provider, as security is proven without a…
Signal tracking beyond the time resolution of an atomic sensor by Kalman filtering
Ricardo Jiménez-Martínez, Jan Kolodynski, Charikleia Troullinou +3
We study causal waveform estimation (tracking) of time-varying signals in a paradigmatic atomic sensor, an alkali vapor monitored by Faraday rotation probing. We use Kalman filteri…
Adding dynamical generators in quantum master equations
Jan Kolodynski, Jonatan Bohr Brask, Marti Perarnau-Llobet +1
The quantum master equation is a widespread approach to describing open quantum system dynamics. In this approach, the effect of the environment on the system evolution is entirely…
The ultimate precision limits for noisy frequency estimation
Andrea Smirne, Jan Kolodynski, Susana F. Huelga +1
Quantum metrology protocols allow to surpass precision limits typical to classical statistics. However, in recent years, no-go theorems have been formulated, which state that typic…
Asymptotic role of entanglement in quantum metrology
Remigiusz Augusiak, Jan Kolodynski, Alexander Streltsov +3
Quantum systems allow one to sense physical parameters beyond the reach of classical statistics---with resolutions greater than , where is the number of constituent partic…
Improved Quantum Magnetometry beyond the Standard Quantum Limit
J. B. Brask, R. Chaves, J. Kolodynski
Under ideal conditions, quantum metrology promises a precision gain over classical techniques scaling quadratically with the number of probe particles. At the same time, no-go resu…
Precision bounds in noisy quantum metrology
Jan Kolodynski
In an idealistic setting, quantum metrology protocols allow to sense physical parameters with mean squared error that scales as with the number of particles involved---subs…
Quantum limits in optical interferometry
R. Demkowicz-Dobrzanski, M. Jarzyna, J. Kolodynski
Non-classical states of light find applications in enhancing the performance of optical interferometric experiments, with notable example of gravitational wave-detectors. Still, th…
Efficient tools for quantum metrology with uncorrelated noise
Jan Kolodynski, Rafal Demkowicz-Dobrzanski
Quantum metrology offers an enhanced performance in experiments such as gravitational wave-detection, magnetometry or atomic clocks frequency calibration. The enhancement, however,…
Noisy metrology beyond the standard quantum limit
R. Chaves, J. B. Brask, M. Markiewicz +2
Parameter estimation is of fundamental importance in areas from atomic spectroscopy and atomic clocks to gravitational wave detection. Entangled probes provide a significant precis…
Eigenmode description of Raman scattering in atomic vapors in the presence of decoherence
Jan Kolodynski, Jan Chwedenczuk, Wojciech Wasilewski
A theoretical model describing the Raman scattering process in atomic vapors is constructed. The treatment investigates the low-excitation regime suitable for modern experimental a…
The elusive Heisenberg limit in quantum enhanced metrology
Rafal Demkowicz-Dobrzanski, Jan Kolodynski, Madalin Guta
We provide efficient and intuitive tools for deriving bounds on achievable precision in quantum enhanced metrology based on the geometry of quantum channels and semi-definite progr…
Phase estimation without a priori knowledge in the presence of loss
Jan Kolodynski, Rafal Demkowicz-Dobrzanski
We find the optimal scheme for quantum phase estimation in the presence of loss when no a priori knowledge on the estimated phase is available. We prove analytically an explicit lo…