Regula Bartosz, Di Martino Sara, Lee Soojoon, Adesso Gerardo
School of Mathematical Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.
School of Mathematical Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom and Dipartimento di Matematica, Universitá di Bari, I-70125 Bari, Italy.
Phys Rev Lett. 2014 Sep 12;113(11):110501. doi: 10.1103/PhysRevLett.113.110501. Epub 2014 Sep 10.
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.
我们研究了多量子比特态中二分纠缠和多分纠缠的分布。特别地，我们定义了一组一夫一妻制不等式，这些不等式强化了传统的科夫曼 - 昆杜 - 伍特斯约束，并且我们为相关类别的态提供了其有效性的解析证明。我们给出了大量数值证据，验证了关于四个量子比特任意纯态的推测的强一夫一妻制不等式。
