搜索结果: 1-15 共查到“理论物理学 positive”相关记录15条 . 查询时间(0.167 秒)
A positive energy theorem for asymptotically de Sitter spacetimes
DE sitter spacetime conserved DE sitter universe spinor and energy
2014/12/22
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...
Numerical study of the three-dimensional random-field Ising model at zero and positive temperature
Three-dimensional ising model zero temperature heat capacity critical point
2014/12/20
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
the general XY Model positive zero temperature non-selection Dynamical Systems
2011/7/28
On the general XY Model: positive and zero temperature, selection and non-selection.
Exposed faces for decomposable positive linear maps arising from completely positive maps
decomposable positive maps exposed faces product vectors
2011/7/25
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 ...
Open system quantum dynamics with correlated initial states, not completely positive maps and non-Markovianity
quantum dynamics non-Markovianity Quantum Physics
2010/11/8
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 ...
Conformal cosmology with a positive effective gravitational constant
Conformal cosmology positive effective gravitational constant
2010/12/20
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.
High-order quantum back-reaction and quantum cosmology with a positive cosmological constant
High-order quantum back-reaction quantum cosmology positive cosmological constant
2010/12/20
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....
A completely positive map associated with a positive map
positive map associated positive map
2010/10/27
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...
Relations Between Characteristic Function, Positive P-Representation and Coherent Thermal State
coherent thermal state characteristic function positive P-representation
2007/8/15
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 ...
Controlling Chaos in a Semiconductor Laser via Weak Optical Positive Feedback and Modulating Amplitude
chaos control positive feedback period
2007/8/15
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...
The Interacting Boson Model of Dipole-Octupole Strong Correlations
in SU(3) Limit for Positive Parity States
Usdpf(16)-IBM dipole-octupole strong correlations
176Hf
Kπ=1+ 3+ rotational bands
2007/8/15
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
...
Ferromagnetic Properties of Bond-Dilution and Random Positive or
Negative Uniaxial Anisotropy
Blume-Capel Model
ferromagnetic properties Blume-Capel model bond dilution random uniaxial
anisotropy effective field theory
2007/8/15
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...