Publications (9)
Enhancing axial localization with wavefront control
M. Peterek, M. Paur, M. Vitek +6
Enhancing the ability to resolve axial details is crucial in three-dimensional optical imaging. We provide experimental evidence showcasing the ultimate precision achievable in axi…
Localized inter-valley defect excitons as single-photon emitters in WSe
L. Linhart, M. Paur, V. Smejkal +3
Single-photon emitters play a key role in present and emerging quantum technologies. Several recent measurements have established monolayer WSe as a promising candidate for a r…
Efficient tomography with unknown detectors
L. Motka, M. Paur, J. Rehacek +2
We compare the two main techniques used for estimating the state of a physical system from unknown measurements: standard detector tomography and data-pattern tomography. Adopting…
Intensity-Based Axial Localization at the Quantum Limit
J. Rehacek, M. Paur, B. Stoklasa +3
We derive fundamental precision bounds for single-point axial localization. For the case of a Gaussian beam, this ultimate limit can be achieved with a single intensity scan, provi…
Multiparameter Quantum Metrology of Incoherent Point Sources: Towards Realistic Superresolution
J. Rehacek, Z. Hradil, B. Stoklasa +4
We establish the multiparameter quantum Cramér-Rao bound for simultaneously estimating the centroid, the separation, and the relative intensities of two incoherent optical point s…
Sampling the spatial coherence of light
M. Vitek, M. Peterek, D. Koutny +6
We introduce a novel application of the Hartmann sensor, traditionally designed for wavefront sensing, to measure the coherence properties of optical signals. By drawing an analogy…
Tempering Rayleigh's curse with PSF shaping
M. Paur, B. Stoklasa, J. Grover +4
It has been argued that, for a spatially invariant imaging system, the information one can gain about the separation of two incoherent point sources decays quadratically to zero wi…
When quantum state tomography benefits from willful ignorance
L. Motka, M. Paur, J. Rehacek +2
We show that quantum state tomography with perfect knowledge of the measurement apparatus proves to be, in some instances, inferior to strategies discarding all information about t…
Dispelling Rayleigh's Curse
J. Rehacek, M. Paur, B. Stoklasa +3
We devise a systematic method to determine the Fisher information required for resolving two incoherent point sources with a diffraction-limited linear imaging device. The resultin…