Measurement and Information Extraction in Complex Dynamics Quantum Computation View Full Text


Ontology type: schema:Chapter      Open Access: True


Chapter Info

DATE

2004

AUTHORS

Giulio Casati , Simone Montangero

ABSTRACT

Quantum Information processing has several di.erent applications: some of them can be performed controlling only few qubits simultaneously (e.g. quantum teleportation or quantum cryptography) [1]. Usually, the transmission of large amount of information is performed repeating several times the scheme implemented for few qubits. However, to exploit the advantages of quantum computation, the simultaneous control of many qubits is unavoidable [2]. This situation increases the experimental di.culties of quantum computing: maintaining quantum coherence in a large quantum system is a di.cult task. Indeed a quantum computer is a many-body complex system and decoherence, due to the interaction with the external world, will eventually corrupt any quantum computation. Moreover, internal static imperfections can lead to quantum chaos in the quantum register thus destroying computer operability [3]. Indeed, as it has been shown in [4], a critical imperfection strength exists above which the quantum register thermalizes and quantum computation becomes impossible. We showed such e.ects on a quantum computer performing an e.cient algorithm to simulate complex quantum dynamics [5,6]. More... »

PAGES

341-348

Book

TITLE

Decoherence and Entropy in Complex Systems

ISBN

978-3-540-20639-2
978-3-540-40968-7

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-540-40968-7_24

DOI

http://dx.doi.org/10.1007/978-3-540-40968-7_24

DIMENSIONS

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