搜索结果: 1-8 共查到“计算物理学 W states”相关记录8条 . 查询时间(0.156 秒)
Geometric Entanglement of Symmetric States and the Majorana Representation
Geometric Entanglement Symmetric States Majorana Representation
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2010/11/8
Permutation-symmetric quantum states appear in a variety of physical situations, and they have been proposed for quantum information tasks. This article builds upon the results of [New J. Phys. 12, 0...
Computational Difficulty of Computing the Density of States
Computational Computing the Density of States
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2010/11/5
We study the computational difficulty of computing the ground state degeneracy and the density of states for local Hamiltonians. We show that the difficulty of both problems is exactly captured by a c...
The Wigner-Fokker-Planck equation: Stationary states and large-time behavior
Wigner-Fokker-Planck equation Stationary states large-time behavior
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2010/11/11
We consider the linear Wigner-Fokker-Planck equation subject to confining potentials which are smooth perturbations of the harmonic oscillator potential. For a certain class of perturbations we prove ...
Necessity of Superposition of Macroscopically Distinct States for Quantum Computational Speedup
Necessity of Superposition Macroscopically Distinct States Quantum Computational Speedup
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2010/10/21
For quantum computation, we investigate the conjecture that superposition of macroscopically
distinct states is necessary for large quantum speedup. Although this conjecture was supported for a circu...
Entangled states considered as physical representations of classical algorithms
Entangled states physical representations classical algorithms
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2010/10/21
There are good reasons to believe that we are classical algorithms run on (effectively) classical machines. However, the fact that a physical state of a system in a universe described by a classical d...
Coherent states for quadratic Hamiltonians
Coherent states quadratic Hamiltonians
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2010/10/19
The coherent states for a set of quadratic Hamiltonians in the trap regime are constructed.
A matrix technique which allows to identify directly the creation and annihilation
operators will be prese...
Coherent states, displaced number states and Laguerre polynomial states for su(1,1) Lie algebra
Coherent states displaced number states Laguerre polynomial states su(1,1) Lie algebra
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2010/10/13
The ladder operator formalism of a general quantum state for su(1,1)ie algebra is obtained. The state bears the generally deformed oscillator algebraic structure. It is found that the Perelomov’s cohe...
Note on Separability of the Werner states in arbitrary dimensions
Separability Werner states arbitrary dimensions
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2010/10/18
Great progress has been made recently in establishing conditions for separability of a particular class of Werner densities on the tensor product space of n d–level systems (qudits). In this brief not...