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19 papers · 2 filters
Quantum walk as a simulator of nonlinear dynamics: Nonlinear Dirac equation and solitons
Chang-Woo Lee, Paweł Kurzyński, Hyunchul Nha
Quantum walk (QW) provides a versatile tool to study fundamental physics and also to make a variety of practical applications. We here start with the recent idea of {\it nonlinear}…
Heisenberg's error-disturbance relations: a joint measurement-based experimental test
Yuan-yuan Zhao, Paweł Kurzyński, Guo-yong Xiang +2
The Heisenberg's error-disturbance relation is a cornerstone of quantum physics. It was recently shown to be not universally valid and two different approaches to reformulate it we…
Macroscopic limit of nonclassical correlations
Pawel Kurzynski, Dagomir Kaszlikowski
We consider macroscopic correlations in a bipartite system consisting of 2N particles described by a generalised probabilistic theory. In particular, we discuss a case of N PR-boxe…
Increasing relative nonclassicality quantified by standard entanglement potentials by dissipation and unbalanced beam splitting
Adam Miranowicz, Karol Bartkiewicz, Neill Lambert +2
If a single-mode nonclassical light is combined with the vacuum on a beam splitter, then the output state is entangled. As proposed in [Phys. Rev. Lett. 94, 173602 (2005)], by meas…
Priority Choice Experimental Two-qubit Tomography: Measuring One by One All Elements of Density Matrices
Karol Bartkiewicz, Antonín Černoch, Karel Lemr +1
In standard optical tomographic methods, the off-diagonal elements of a density matrix are measured indirectly. Thus, the reconstruction of , even if it is based on linear i…
Tunable multiphonon blockade in coupled nanomechanical resonators
Adam Miranowicz, Jiri Bajer, Neill Lambert +2
A single phonon in a nonlinear nanomechanical resonator (NAMR) can block the excitation of a second phonon [Phys. Rev. A 82, 032101 (2010)]. This intrinsically quantum effect is ca…