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Quantum information & computation, ISSN 1533-7146, 05/2013, Volume 13, Issue 5-6, pp. 379 - 392
We review some properties of the convex roof extension, a construction used, e.g., in the definition of the entanglement of formation. Especially we consider... 
Diagonal map | QUANTUM SCIENCE & TECHNOLOGY | Convex roof extension | Output entropy | Entanglement | COMPUTER SCIENCE, THEORY & METHODS | PHYSICS, MATHEMATICAL | PHYSICS, PARTICLES & FIELDS
Journal Article
Physical Review B - Condensed Matter and Materials Physics, ISSN 1098-0121, 2006, Volume 74, Issue 14
In order to study the influence of quenched disorder on second-order phase transitions, high-temperature series expansions of the susceptibility and the free... 
MONTE-CARLO | PHYSICS, CONDENSED MATTER | FERROMAGNETS | UPPER CRITICAL DIMENSION | LOGARITHMIC CORRECTIONS | PERCOLATION | POTTS | CRITICAL-BEHAVIOR | IMPURITIES | EXPANSION APPROACH | CRITICAL EXPONENTS
Journal Article
Computer Physics Communications, ISSN 0010-4655, 08/2002, Volume 147, Issue 1-2, pp. 435 - 438
We use a star-graph expansion technique to compute high-temperature series for the free energy and susceptibility of random-bond q-state Potts models on... 
Quenched random disorder | High-temperature series expansions | Star graphs | Bond-diluted Ising model
Journal Article
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, 2006, Volume 74, Issue 5, p. 051113
We present results for the high-temperature series expansions of the susceptibility and free energy of the q-state Potts model on a D-dimensional hypercubic... 
2-DIMENSIONAL PERCOLATION | UNIVERSALITY | NUMBER | SITE PERCOLATION | CLUSTERS | PHYSICS, FLUIDS & PLASMAS | GENERAL DIMENSION | 3-STATE | SCALING CORRECTIONS | PHYSICS, MATHEMATICAL | 3-DIMENSIONAL LATTICES | Physics - Statistical Mechanics
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 05/2009, Volume 79, Issue 5
Explicit expressions for the concurrence of all positive and trace-preserving ("stochastic") one-qubit maps are presented. Our method allows to construct the... 
bifurcation | STATES | entropy | quantum computing | QUANTUM | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | quantum entanglement | OPTICS | stochastic processes | AXIAL SYMMETRY | STOCHASTIC PROCESSES | QUANTUM COMPUTERS | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | QUANTUM ENTANGLEMENT | BIFURCATION | ENTROPY
Journal Article
Quantum Information and Computation, ISSN 1533-7146, 07/2009, Volume 9, Issue 7-8, pp. 0622 - 0627
Let S(rho) = -Tr(rho log rho) be the von Neumann entropy of an N-dimensional quantum state rho and e(2)(rho) the second elementary symmetric polynomial of the... 
Quantum Entropy | QUANTUM SCIENCE & TECHNOLOGY | COMPUTER SCIENCE, THEORY & METHODS | PHYSICS, MATHEMATICAL | PHYSICS, PARTICLES & FIELDS
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 0556-2821, 1997, Volume 56, Issue 8, pp. 5194 - 5199
We investigate a generalized nonlinear O(3) sigma model in three space dimensions where the fields are maps from R-3 boolean OR{infinity} to S-2. Such maps are... 
SKYRME MODEL | INDEX | K UP PHYSICS, PARTICLES & FIELDS | PHYSICS, PARTICLES & FIELDS
Journal Article
06/2012
We review some properties of the convex roof extension, a construction used, e.g., in the definition of the entanglement of formation. Especially we consider... 
Physics - Quantum Physics
Journal Article
Physical review. E, Statistical, nonlinear, and soft matter physics, ISSN 1539-3755, 11/2006, Volume 74, Issue 5
Journal Article
Physical Review B - Condensed Matter and Materials Physics, ISSN 0163-1829, 06/1997, Volume 55, Issue 23, pp. 15372 - 15374
We estimate the composite-fermion effective mass for a general two-particle potential r(-alpha) using exact diagonalization for polarized electrons in the... 
PHYSICS, CONDENSED MATTER | K UK PHYSICS, CONDENSED MATTER | QUANTUM HALL STATES | ENERGY | FILLED LANDAU-LEVEL | GAPS | Physics - Mesoscale and Nanoscale Physics
Journal Article
03/2009
Physical Review A 79 (2009) 052319 Explicit expressions for the concurrence of all positive and trace-preserving ("stochastic") 1-qubit maps are presented. We... 
Physics - Quantum Physics
Journal Article
12/2008
Quantum Information and Computation 9 (2009) 622-627 Let $S(\rho)=- Tr (\rho \log\rho)$ be the von Neumann entropy of an $N$-dimensional quantum state $\rho$... 
Physics - Quantum Physics
Journal Article
02/2008
Explicit expressions for the concurrence of all positive and trace-preserving ("stochastic") 1-qubit maps are presented. By a new method we find the relevant... 
Physics - Quantum Physics
Journal Article
Computer Physics Communications, ISSN 0010-4655, 2002, Volume 147, Issue 1, pp. 435 - 438
We use a star-graph expansion technique to compute high-temperature series for the free energy and susceptibility of random-bond q-state Potts models on... 
Quenched random disorder | High-temperature series expansions | Star graphs | Bond-diluted Ising model
Journal Article
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, ISSN 1063-651X, 02/2003, Volume 67, Issue 2, pp. 261181 - 261189
We derive high-temperature series expansions for the free energy and the susceptibility of random-bond q-state Potts models on hypercubic lattices using a... 
ISING FERROMAGNET | PHYSICS, FLUIDS & PLASMAS | SERIES ANALYSIS | SYSTEMS | CRITICAL-BEHAVIOR | IMPURITIES | PHYSICS, MATHEMATICAL
Journal Article
02/2005
Condens. Matter Phys. 8(2005)59-74 We discuss recently generated high-temperature series expansions for the free energy and the susceptibility of random-bond... 
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 0556-2821, 2000, Volume 61, Issue 8, pp. 1 - 9
Phys.Rev.D61:085008,2000 The vacuum energy of a scalar field in a spherically symmetric background field is considered. Based on previous work... 
Physics - High Energy Physics - Theory
Journal Article
Physical Review B - Condensed Matter and Materials Physics, ISSN 0163-1829, 11/1997, Volume 56, Issue 19, pp. 12116 - 12119
Journal Article
Condensed Matter Physics, ISSN 1607-324X, 2005, Volume 8, Issue 1, pp. 59 - 74
Journal Article
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