Anomalous quantum states in finite macroscopic systems

Details Anomalous quantum states in finite macroscopic systems Anomalous quantum states in finite macroscopic systems

2003-11-26

arxiv.org/abs/quant-ph/0311176v2

Physics

Quantum Physics

5 pages, to appear in a special issue in the International Journal of Quantum Information. Version 2 is the published version,

Scientific paper

We consider finite macroscopic systems, i.e., systems of large but finite degrees of freedom, which we believe are poorly understood as compared with small systems and infinite systems. We focus on pure states that do not have the `cluster property.' Such a pure state is entangled macroscopically, and is quite anomalous in view of many-body physics because it does not approach any pure state in the infinite-size limit. However, we often encounter such anomalous states when studying finite macroscopic systems, such as quantum computers with many qubits and finite systems that will exhibit symmetry breaking in the infinite-size limit. We study stabilities of such anomalous states in general systems. In contrast to the previous works, we obtain general and universal results, by making full use of the locality of the theory. Using the general results, we discuss roles of anomalous states in quantum computers, and the mechanism of emergence of a classical world from quantum theory.

Affiliated with

Also associated with

No associations

Rating

Anomalous quantum states in finite macroscopic systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Anomalous quantum states in finite macroscopic systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous quantum states in finite macroscopic systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-122708