14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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8 papers · 2 filters
Hydrogen atom in phase space. The Kirkwood-Rihaczek representation
L. Praxmeyer, K. Wodkiewicz
We present a phase-space representation of the hydrogen atom using the Kirkwood-Rikaczek distribution function. This distribution allows us to obtain analytical results, which is q…
Scattering theory of plasmon-assisted entanglement transfer and distillation
J. L. van Velsen, J. Tworzydlo, C. W. J. Beenakker
We analyse the quantum mechanical limits to the plasmon-assisted entanglement transfer observed by E. Altewischer, M.P. van Exter, and J.P. Woerdman [Nature, 418, 304 (2002)]. The…
Quantum Markov Channels for Qubits
Sonja Daffer, Krzysztof Wodkiewicz, John K. McIver
We examine stochastic maps in the context of quantum optics. Making use of the master equation, the damping basis, and the Bloch picture we calculate a non-unital, completely posit…
Quantum Interference in the Kirkwood-Rihaczek representation
L. Praxmeyer, K. Wodkiewicz
We discuss the Kirkwood-Rihaczek phase space distribution and analyze a whole new class of quasi-distributions connected with this function. All these functions have the correct ma…
Tractability of Approximation for Weighted Korobov Spaces on Classical and Quantum Computers
E. Novak, I. H. Sloan, H. Wozniakowski
The paper studies quantum complexity, tractability, and strong tractability for high dimensional multivariate approximation. We study a space of functions important in many applica…
Generation and control of resonance states in crossed magnetic and electric fields
Katarzyna Krajewska, Jerzy Z. Kaminski
A two-dimensional electron system interacting with an impurity and placed in crossed magnetic and electric fields is under investigation. Since it is assumed that an impurity cente…
Direct measurement of optical quasidistribution functions: multimode theory and homodyne tests of Bell's inequalities
Konrad Banaszek, Andrzej Dragan, Krzysztof Wodkiewicz +1
We develop a multimode theory of direct homodyne measurements of quantum optical quasidistribution functions. We demonstrate that unbalanced homodyning with appropriately shaped au…
Quantum-optical communication rates through an amplifying random medium
J. Tworzydlo, C. W. J. Beenakker
We study the competing effects of stimulated and spontaneous emission on the information capacity of an amplifying disordered waveguide. At the laser threshold the capacity reaches…