Quantum computing models as a?tool box for controlling and understanding the nanoscopic world |
| |
| Authors: | Dominik Janzing |
| |
| Institution: | (1) Departamento de Matem?tica Aplicada y Estad?stica, Universidad Polit?cnica de Cartagena, Paseo Alfonso XIII 56, 30203 Cartagena, Spain |
| |
| Abstract: | Progress in controlling quantum systems is the major pre-requisite
for the realization of quantum computing, yet the results of quantum computing research can also be useful
in solving quantum control problems that are not related to computational problems. We arguethat quantum
computing provides clear concepts and simple models for discussing quantum theoretical problems. In this
article we describe examples from completely different fields where models of quantum computing and quantum
communication shed light on quantum theory.
First we address quantum limits of classical low power computation and argue that the terms of quantum
information theory allows us to discuss device-independent bounds. We
argue that a classical bit behaves to some extent like a quantum bit in the time period where
it switches its logical value. This implies that a readout during the switching process generates
entropy. A related problem is the distribution of timing information like clock signals in low power
devices. For low signal energy, the situation is close to phase-covariant cloning problems in quantum information
theory. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
