1306.0742 (Ri Qu et al.)

Locally maximally entangleable states and W-type states    [PDF]

Ri Qu, Juan Wang, Yan-ru Bao, Zong-shang Li

We investigate the relationship between locally maximally entangleable (LME) states and W-type states which are equivalent to a W state under stochastic local operations and classical communication (SLOCC). We prove that (i) some special W-type states of three qubits are LME; and (ii) no W-type state of four and more qubits is LME. Our results show that the W state of four and more qubits cannot be prepared by using LME states under SLOCC. However, for three qubits some special LME states can be used to prepare the W state under SLOCC.

View original: http://arxiv.org/abs/1306.0742