Entanglement for multipartite systems of indistinguishable particles

Canonical entanglement for two indistinguishable particles

We determine the degree of entanglement for two indistinguishable particles based on the tensor product structure, which is a framework for emphasizing entanglement founded on observational quantities. Our theory connects the canonical entanglement and entanglement based on occupation number for two fermions and for two bosons and shows that the entanglement measure, based on linear entropy, is...

Multipartite entanglement in qubit systems

We introduce a potential of multipartite entanglement for a system of n qubits, as the average over all balanced bipartitions of a bipartite entanglement measure, the purity. We study in detail its expression and look for its minimizers, the maximally multipartite entangled states. They have a bipartite entanglement that does not depend on the bipartition and is maximal for all possible biparti...

Entanglement of indistinguishable particles in condensed-matter physics

Entanglement purification for high-dimensional multipartite systems

Yong Wook Cheong, Seung-Woo Lee, Jinhyoung Lee, and Hai-Woong Lee Quantum Photonic Science Research Center, Hanyang University, Seoul 133-791, Korea Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom BK21 Program Division of Advanced Research and Education in Physics, Hanyang University, Seoul 133-791, Korea Department of Physics, Hanyang University, Seoul 13...

Entanglement of indistinguishable particles shared between two parties.

Using an operational definition we quantify the entanglement, E(P), between two parties who share an arbitrary pure state of N indistinguishable particles. We show that E(P)< or =E(M), where E(M) is the bipartite entanglement calculated from the mode-occupation representation. Unlike E(M), E(P) is superadditive. For example, E(P)=0 for any single-particle state, but the state |1>|1>, where both...