3.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GdańskPL161 papers
- National Quantum Information Centre in GdanskPL99 papers
- Princeton UniversityUS44 papers
- Polish Academy of SciencesPL40 papers
- Jagiellonian UniversityPL34 papers
- Los Alamos National LaboratoryUS25 papers
- AGH University of KrakowPL20 papers
- Adam Mickiewicz University in PoznańPL19 papers
- Center for Theoretical PhysicsPL19 papers
- Vrije Universiteit BrusselBE19 papers
- Centre National de la Recherche ScientifiqueFR17 papers
- RWTH Aachen UniversityDE17 papers
16 papers · 1 filter
A few steps more towards NPT bound entanglement
Łukasz Pankowski, Marco Piani, Michał Horodecki +1
We consider the problem of existence of bound entangled states with non-positive partial transpose (NPT). As one knows, existence of such states would in particular imply nonadditi…
Magnetism and structure of LixCoO2 and comparison to NaxCoO2
J. T. Hertz, Q. Huang, T. McQueen +4
The magnetic properties and structure of LixCoO2 for x between 0.5 and 1.0 are reported. Co4+ is found to be high-spin in LixCoO2 for x between 0.94 and 1.0 and low-spin for x betw…
Tensor-product vs. geometric-product coding
Diederik Aerts, Marek Czachor
Quantum computation is based on tensor products and entangled states. We discuss an alternative to the quantum framework where tensor products are replaced by geometric products an…
A general scheme for construction of scalar separability criteria from positive maps
Remigiusz Augusiak, Julia Stasińska
We present a general scheme that allows for construction of scalar separability criteria from positive but not completely positive maps. The concept is based on a decomposition of…
How not to discard half of the cases in QKD
Marcin Pawlowski
All known QKD protocols require the parties to discard the results when they have chosen differen bases. In this paper we show that it is not necessary. We give examples of QKD pro…
Crystal Structure and Physical Properties of Mg6Cu16Si7-type M6Ni16Si7, for M = Mg, Sc, Ti, Nb, and Ta
K. L. Holman, E. Morosan, P. A. Casey +5
Five compounds were investigated for magnetic character and superconductivity, all with non-magnetic nickel and band structures containing flat bands and steep bands. The syntheses…
No-local-broadcasting theorem for quantum correlations
Marco Piani, Pawel Horodecki, Ryszard Horodecki
We prove that the correlations present in a multipartite quantum state have an \emph{operational} quantum character as soon as the state does not simply encode a multipartite class…
Elementary gates for cartoon computation
Marek Czachor
The basic one-bit gates (X, Y, Z, Hadamard, phase, pi/8) as well as the controlled cnot and Toffoli gates are reformulated in the language of geometric-algebra quantum-like computa…
Beyond the standard entropic inequalities: stronger scalar separability criteria and their applications
Remigiusz Augusiak, Julia Stasińska, Pawel Horodecki
Recently it was shown that if a given state fulfils the reduction criterion it must also satisfy the known entropic inequalities. Now the questions arises whether on the assumption…
The effect of Fe and Ru substitution for Ni on the thermopower in MgCNi_3
C. Sulkowski, T. Klimczuk, R. J. Cava +1
The intermetallic perovskite MgCNi3 is a superconductor with a Tc=7 K. Substitution of Fe and Ru for Ni decreases Tc monotonically as the doping concentration is increased. Here we…
Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16
T. Klimczuk, F. Ronning, V. Sidorov +2
Specific heat, electrical resistivity, and magnetic susceptibility measurements on a high quality sample of Mg10Ir19B16 provide a self-consistent determination of its superconducti…
Fluctuation-enhanced sensing
L. B. Kish, G. Schmera, Ch. Kwan +3
We present a short survey on fluctuation-enhanced gas sensing. We compare some of its main characteristics with those of classical sensing. We address the problem of linear respons…
Squashed entanglement for multipartite states and entanglement measures based on the mixed convex roof
Dong Yang, Karol Horodecki, Michal Horodecki +3
New measures of multipartite entanglement are constructed based on two definitions of multipartite information and different methods of optimizing over extensions of the states. On…
Magnetic Structure and Properties of the S = 5/2 Triangular Antiferromagnet -NaFeO
T. M. McQueen, Q. Huang, J. W. Lynn +5
The magnetic properties of -NaFeO are studied by neutron diffraction and magnetization measurements. An ordered phase with spins aligned along the b axis exists at low…
Separability in terms of a single entanglement witness
Piotr Badziąg, Paweł Horodecki, Ryszard Horodecki +1
The separability problem is formulated in terms of a characterization of a single entanglement witness. More specifically, we show that any (in general multipartite) state \varrho…
Rotationally invariant bipartite states and bound entanglement
Remigiusz Augusiak, Julia Stasińska
We consider rotationally invariant states in $\mathbb{C}^{N_{1}}\ot \mathbb{C}^{N_{2}}$ Hilbert space with even and arbitrary , and show that in such…