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Q: Fachverband Quantenoptik und Photonik

Q 31: Quanteninformation (Konzepte und Methoden I)

Q 31.5: Vortrag

Donnerstag, 13. März 2008, 09:30–09:45, 1B

Evolution equation for quantum entanglement — •Markus Tiersch^1,2, Thomas Konrad³, Fernando de Melo^1,2, Christian Kasztelan⁴, Adriano Aragao^5,2, and Andreas Buchleitner^1,2 — ¹Albert–Ludwigs–Universität Freiburg, Physikalisches Institut, Hermann–Herder–Str. 3, D–79104 Freiburg, Germany — ²Max–Planck–Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D–01187 Dresden, Germany — ³Quantum Research Group, School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa — ⁴Institut für Theoretische Physik C, RWTH Aachen, D–52056 Aachen, Germany — ⁵Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68.528, CEP 21945-970, Rio de Janeiro, RJ, Brazil

Quantum systems composed of two qubits consitute the starting point for the study of quantum entanglement. The evolution of entanglement when such a system is subject to open system dynamics will be examined in this talk. We will derive a simple factorization relation which describes the system’s final entanglement after one of the qubits has undergone an arbitrary physical process.