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We construct a set of conserved charges for asymptotically de Sitter spacetimes that correspond to asymptotic conformal isometries. The charges are given by boundary integrals at spatial infinity in t...
In this paper the three-dimensional random-field Ising model is studied at both zero temperature and positive temperature. Critical exponents are extracted at zero temperature by finite size scaling a...
On the general XY Model: positive and zero temperature, selection and non-selection.
Abstract: Let $D$ be a space of $2\times n$ matrices. Then the face of the cone of all completely positive maps from $M_2$ into $M_n$ given by $D$ is an exposed face of the bigger cone of all decompos...
In this paper the problem of comparing initial data to a reference solution for the vacuum Einstein field equations is considered. This is not done in a coordinate sense, but through quantification ...
Dynamical A and B maps have been employed extensively by Sudarshan and co-workers to investigate open system evolution of quantum systems. A canonical structure of the A-map is introduced here. It is ...
The conformal cosmological model presented by Mannheim predicts a negative value for the effective gravitational constant, Geff. It also involves a scalar field, S, which is treated classically.
When quantum back-reaction by fluctuations, correlations and higher moments of a state becomes strong, semiclassical quantum mechanics resembles a dynamical system with a high-dimensional phase space....
We show that each positive map from B(K) to B(H) is a scalar mul-tiple of a map of the form T r − with completely positive. This is used to give necessary and sufficient conditions for maps ...
The concept of the half density matrix is proposed. It unifies the quantum states which are described by density matrices and physical processes which are described by completely positive maps. With t...
2007Vol.48No.1pp.67-70DOI: Relations Between Characteristic Function, Positive P-Representation and Coherent Thermal State FAN Hong-Yi1,2 and XU Xing-Lei3 1 Department ...
2007Vol.47No.3pp.491-494DOI: Controlling Chaos in a Semiconductor Laser via Weak Optical Positive Feedback and Modulating Amplitude YAN Sen-Lin Physical Department, Nanj...
2003Vol.39No.5pp.587-592DOI: The Interacting Boson Model of Dipole-Octupole Strong Correlations in SU(3) Limit for Positive Parity States QIAN Cheng-De, LIU Dang-Bo, and REN Hao ...
2004Vol.42No.5pp.789-794DOI: Ferromagnetic Properties of Bond-Dilution and Random Positive or Negative Uniaxial Anisotropy Blume-Capel Model ZHU Hai-Xia1 and YAN Shi-Lei1,2,3 ...
Spinors and Positive Mass     Spinors  Positive Mass       2010/4/15
As an example of how spinor methods can be applied to the positive-mass theorem, a simple, spinor-based proof of the theorem is presented for the case of a single black hole. Generalisations of the th...

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