ua nt - p h / 06 05 06 3 v 1 6 M ay 2 00 6 Entanglement in a Quantum Mixed - Spin Chain
نویسنده
چکیده
The entanglement in a general mixed spin chain with arbitrary spin S and 1/2 is investigated in the thermodynamical limit. The entanglement is witnessed by the magnetic susceptibility which decides a characteristic temperature for an entangled thermal state. The characteristic temperature is nearly proportional to the interaction J and the mixed spin S. The bound of negativity is obtained on the basis of the magnetic susceptibility. It is found that the macroscopic magnetic properties are affected by the quantum entanglement in the real solids. Meanwhile, the entanglement can be quantitatively evaluated by the thermody-
منابع مشابه
ar X iv : q ua nt - p h / 06 05 10 3 v 1 1 1 M ay 2 00 6 On Concurrence and Entanglement of Rank Two Channels ∗ Armin Uhlmann
Concurrence and further entanglement quantifiers can be computed explicitly for channels of rank two if representable by just two Kraus operators. Almost all details are available for the subclass of rank two 1-qubit channels. There is a simple geometric picture beyond, explaining nicely the role of anti-linearity.
متن کاملar X iv : q ua nt - p h / 06 05 10 3 v 1 1 1 M ay 2 00 6 On Concurrence and Entanglement of Rank Two Channels
Concurrence and further entanglement quantifiers can be computed explicitly for channels of rank two if representable by just two Kraus operators. Almost all details are available for the subclass of rank two 1-qubit channels. There is a simple geometric picture beyond, explaining nicely the role of anti-linearity.
متن کاملar X iv : q ua nt - p h / 02 06 02 1 v 2 6 M ay 2 00 3 Entanglement and properties ∗
Various topics concerning the entanglement of composite quantum systems are considered with particular emphasis concerning the strict relations of such a problem with the one of attributing objective properties to the constituents. In particular we will focus our attention to composite quantum systems composed of identical constituents, with the purpose of dealing with subtle issues, which have...
متن کاملar X iv : q ua nt - p h / 06 10 05 5 v 1 9 O ct 2 00 6 Entanglement localization by a single defect in a spin chain
We discuss the effect of a single diagonal defect on both the static and dynamical properties of entanglement in a spin chain. We show that entanglement localizes at the defect and discuss its localization length, arguing that this can be used as a mean to store entanglement. We also show that the impurity site can behave as an entanglement mirror and characterize the bouncing process in terms ...
متن کاملua nt - p h / 06 05 21 9 v 1 2 5 M ay 2 00 6 Classical simulators of quantum computers and no - go theorems
It is discussed, why classical simulators of quantum computers escape from some no-go claims like Kochen-Specker, Bell, or recent Conway-Kochen " Free Will " theorems.
متن کامل