159 citations · 750 across the 37 of their papers we have counts for
38 papers
Superluminal Quantum Reference Frames
Amrapali Sen, Matthias Salzger, Łukasz Rudnicki
While particles cannot travel faster than the speed of light, nor can information, this assumption has over the years been frequently questioned. Most recently, it has been argued…
Superresolution in separation estimation between two dynamic incoherent sources using spatial demultiplexing
Konrad Schlichtholz, Łukasz Rudnicki
Achieving resolution in the sub-Rayleigh regime (superresolution) is one of the rapidly developing topics in quantum optics and metrology. Recently, it was shown that perfect measu…
Quantum switch as a thermodynamic resource in the context of passive states
Otavio A. D. Molitor, Łukasz Rudnicki
In recent years many works have explored possible advantages of indefinite causal order, with the main focus on its controlled implementation known as quantum switch. In this paper…
Spectral and temporal metrology with bandlimited functions and finite-time measurements
Łukasz Rudnicki, Tomasz Linowski
We perform an analysis supplementing the metrology toolbox in the time-frequency domain. While the relevant time-frequency-based metrological protocols can be borrowed from the spa…
Open dynamics of entanglement in mesoscopic bosonic systems
Konrad Schlichtholz, Łukasz Rudnicki
A key issue in Quantum Information is finding an adequate description of mesoscopic systems that is simpler than full quantum formalism yet retains crucial information about non-cl…
Relating the Glauber-Sudarshan, Wigner and Husimi quasiprobability distributions operationally through the quantum limited amplifier and attenuator channels
Tomasz Linowski, Łukasz Rudnicki
The Glauber-Sudarshan, Wigner and Husimi quasiprobability distributions are indispensable tools in quantum optics. However, although mathematical relations between them are well es…
Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers
Konrad Schlichtholz, Tomasz Linowski, Mattia Walschaers +3
Quantum-optimal discrimination between one and two closely separated light sources can be achieved by ideal spatial-mode demultiplexing, simply monitoring whether a photon is detec…
Spectral stabilizability
Tomasz Linowski, Łukasz Rudnicki, Clemens Gneiting
Decoherence represents a major obstacle towards realizing reliable quantum technologies. Identifying states that can be uphold against decoherence by purely coherent means, i.e., {…
Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli +4
Superresolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources,…
Bounds on the breaking time for entanglement-breaking channels
Fattah Sakuldee, Łukasz Rudnicki
Entanglement-breaking channels are quantum channels transforming entangled states to separable states. Despite a detailed discussion of their operational structure, to be found in…
Formal relation between Pegg-Barnett and Paul quantum phase frameworks
Tomasz Linowski, Konrad Schlichtholz, Łukasz Rudnicki
The problem of defining a hermitian quantum phase operator is nearly as old as quantum mechanics itself. Throughout the years, a number of solutions was proposed, ranging from abst…
Quantum speed limit and stability of coherent states in quantum gravity
Klaus Liegener, Łukasz Rudnicki
Utilizing the program of expectation values in coherent states and its recently developed algorithmic tools, this letter investigates the dynamical properties of cosmological coher…
Reduced state of the field and classicality of quantum Gaussian evolution
Tomasz Linowski, Łukasz Rudnicki
The notion of classicality of quantum evolution of light is an object of both conceptual and practical importance. The main goal of this work is to derive the exact conditions for…
Dissipative evolution of quantum Gaussian states
Tomasz Linowski, Alexander Teretenkov, Łukasz Rudnicki
Recent works on quantum resource theories of non-Gaussianity, which are based upon the type of tools available in contemporary experimental settings, put Gaussian states and their…
Gauge invariant quantum thermodynamics: consequences for the first law
Lucas Chibebe Céleri, Łukasz Rudnicki
Universality of classical thermodynamics rests on the central limit theorem, due to which, measurements of thermal fluctuations are unable to reveal detailed information regarding…
Fundamental quantum limits in ellipsometry
L. Rudnicki, L. L. Sanchez-Soto, G. Leuchs +1
We establish the ultimate limits that quantum theory imposes on the accuracy attainable in optical ellipsometry. We show that the standard quantum limit, as usual reached when the…
Majorization uncertainty relations for mixed quantum states
Zbigniew Puchała, Łukasz Rudnicki, Aleksandra Krawiec +1
Majorization uncertainty relations are generalized for an arbitrary mixed quantum state of a finite size . In particular, a lower bound for the sum of two entropies characte…
Error regions in quantum state tomography: computational complexity caused by geometry of quantum states
Daniel Suess, Łukasz Rudnicki, Thiago O. Maciel +1
The outcomes of quantum mechanical experiments are inherently random. It is therefore necessary to develop stringent methods for quantifying the degree of statistical uncertainty a…
Detecting entanglement of continuous variables with three mutually unbiased bases
E. C. Paul, D. S. Tasca, Lukasz Rudnicki +1
An uncertainty relation is introduced for a symmetric arrangement of three mutually unbiased bases in continuous variable phase space, and then used to derive a bipartite entanglem…
Nonlinear Schrödinger equation from generalized exact uncertainty principle
Łukasz Rudnicki
Inspired by the generalized uncertainty principle (GUP), which adds gravitational effects to the standard description of quantum uncertainty, we extend the exact uncertainty princi…
Certainty relations, mutual entanglement and non-displacable manifolds
Zbigniew Puchała, Łukasz Rudnicki, Krzysztof Chabuda +2
We derive explicit bounds for the average entropy characterizing measurements of a pure quantum state of size in orthogonal bases. Lower bounds lead to novel entropic uncer…
Exploring complete positivity in hierarchy equations of motion
Björn Witt, Łukasz Rudnicki, Yoshitaka Tanimura +1
We derive a purely algebraic framework for the identification of hierarchy equations of motion that induce completely positive dynamics and demonstrate the applicability of our app…
Testing for entanglement with periodic coarse-graining
Daniel S. Tasca, Łukasz Rudnicki, Reuben S. Aspden +3
Continuous variables systems find valuable applications in quantum information processing. To deal with an infinite-dimensional Hilbert space, one in general has to handle large nu…
Uncertainty relations for characteristic functions
Łukasz Rudnicki, Daniel S. Tasca, Stephen P. Walborn
We present the uncertainty relation for the characteristic functions (ChUR) of the quantum mechanical position and momentum probability distributions. This inequality is more gener…