Abstract
, We investigate tripartite entanglement in an open quantum system, specifically three qubits, all of which are damped, and one of which is driven. We address a systematic approach in calculating the entanglement of various bipartite splits using concurrence as a measure of entanglement Our calculations are based on a direct detection scheme (quantum jump method - with and without knowledge of which qubit jumps) that is a particular unravelling of the density matrix. Our results are unravelling dependent, but apply to applications of entanglement based on direct detection. We also calculate the ’Three-way tangle’ or ’Residual Entanglement’ for this system. We present calculations for a variety of driving and damping rates, and examine what decay rate is adequate for the system to be reduced to two qubits with a readout port. We also consider how knowledge (or not) of which qubit decays affects the entanglement.
© 2012 Optical Society of America
PDF ArticleMore Like This
William J. Konyk, James P. Clemens, and Perry R. Rice
LW1J.2 Laser Science (LS) 2012
Ethan Stanifer and James P. Clemens
M6.11 Conference on Coherence and Quantum Optics (CQO) 2013
A. S. Villar, F. A. S. Barbosa, A. S. Coelho, K. N. Cassemiro, M. Martinelli, and P. Nussenzveig
FTh1C.6 Frontiers in Optics (FiO) 2012