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7 papers · 1 filter
Comment on "Quantum entropy and special relativity" [by A. Peres, P. F. Scudo, and D. R. Terno, Phys. Rev. Lett. 88, 230402 (2002)]
Marek Czachor
Two subtleties of this paper are discussed.
Secure key from bound entanglement
Karol Horodecki, Michal Horodecki, Pawel Horodecki +1
We characterize the set of shared quantum states which contain a cryptographically private key. This allows us to recast the theory of privacy as a paradigm closely related to that…
Quantum Aspects of Semantic Analysis and Symbolic Artificial Intelligence
Diederik Aerts, Marek Czachor
Modern approaches to semanic analysis if reformulated as Hilbert-space problems reveal formal structures known from quantum mechanics. Similar situation is found in distributed rep…
Superconductivity Phase Diagram of Na(x)CoO(2).1.3H(2)O
R. E. Schaak, T. Klimczuk, M. L. Foo +1
Although the microscopic origin of the superconductivity in high Tc copper oxides remains the subject of active inquiry, several of their electronic characteristics are well establ…
Chemical Instability of the Cobalt Oxyhydrate Superconductor under Ambient Conditions
M. L. Foo, R. E. Schaak, V. L. Miller +8
The layered sodium cobalt oxyhydrate superconductor Na0.3CoO2*1.4H2O is shown through X-ray diffraction and thermogravimetric studies to be one of a series of hydrated phases of Na…
Relativistic BB84, relativistic errors, and how to correct them
Marek Czachor, Marcin Wilczewski
The Bennett-Brassard cryptographic scheme (BB84) needs two bases, at least one of them linearly polarized. The problem is that linear polarization formulated in terms of helicities…