搜索结果: 1-10 共查到“计算物理学 Entanglement”相关记录10条 . 查询时间(0.026 秒)
We study the entanglement of formation for arbitrary dimensional bipartite mixed unknown states. Experimentally measurable lower and upper bounds for entanglement of formation are derived.
Geometric Entanglement of Symmetric States and the Majorana Representation
Geometric Entanglement Symmetric States Majorana Representation
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...
Some new identities for quantum variance and covariance involving commutators are presented, in which the density matrix and the operators are treated symmetrically. A measure of entanglement is propo...
Entanglement preparation using symmetric multiports
Entanglement preparation symmetric multiports
2010/11/5
We investigate the entanglement produced by a multi-path interferometer that is composed of two symmetric multiports, with phase shifts applied to the output of the first multiport. Particular attenti...
We report the creation of large Schr¨odinger-Cat states with up to 14 qubits. By investigating
their coherence over time, we observe a decay proportional to the square of the number of qubits.The obs...
Entanglement, discord and the power of quantum computing
Entanglement discord power quantum computing
2010/10/19
It is impossible to implement an entangling bipartite quantum operation with local operations and classical communication (LOCC) without a shared entanglement. When the operation is restricted to act ...
We consider entanglement swapping with general mixed two-mode Gaussian states and calculate
the optimal gains for a broad class of such states including those states most relevant in communication sc...
Entanglement evolution of non-trace-preserving maps
Entanglement evolution non-trace-preserving maps
2010/10/21
By solving the Schrodinger equation one obtains the whole energy spectrum, both the bound and
the continuum states. If the Hamiltonian depends on a set of parameters, these could be tuned to a trans...
q-entropies and the entanglement dynamics of two-qubits interacting with an environment
q-Entropies Entanglement dynamics
2010/7/5
We investigate entropic aspects of the quantum entanglement dynamics of two-qubits systems interacting with an environment. In particular we consider the detection, based on the violation of classical...
Modification of relative entropy of Entanglement
Modification relative entropy Entanglement
2010/10/13
We present the modified relative entropy of entanglement (MRE) in order to both improve the
computability for the relative entropy of entanglement and avoid the problem that the entanglement of forma...