Strong monogamy conjecture for multiqubit entanglement: the four-qubit case.

Phys Rev Lett

School of Mathematical Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.

Published: September 2014

We investigate the distribution of bipartite and multipartite entanglement in multiqubit states. In particular, we define a set of monogamy inequalities sharpening the conventional Coffman-Kundu-Wootters constraints, and we provide analytical proofs of their validity for relevant classes of states. We present extensive numerical evidence validating the conjectured strong monogamy inequalities for arbitrary pure states of four qubits.

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http://dx.doi.org/10.1103/PhysRevLett.113.110501DOI Listing

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