Minimal Rényi–Ingarden–Urbanik Entropy of Multipartite Quantum States

Entropy

Marco Enríquez¹  Zbigniew Puchała²  Karol Życzkowski³ 

[1] Departamento de Física, Cinvestav, AP 14-740, Mexico DF 07000, Mexico;Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, Gliwice 44-100, Poland;Smoluchowski Institute of Physics, Jagiellonian University, ul. Reymonta 4, Kraków PL-30-059, Poland;

关键词: quantum entanglement;    Rényi–Ingarden–Urbanik entropy;    three-tangle;    hyperdeterminants;    random states;   

DOI  :  10.3390/e17075063

来源: DOAJ

【 摘 要 】

We study the entanglement of a pure state of a composite quantum system consisting of several subsystems with d levels each. It can be described by the Rényi–Ingarden–Urbanik entropy Sq of a decomposition of the state in a product basis, minimized over all local unitary transformations. In the case q = 0, this quantity becomes a function of the rank of the tensor representing the state, while in the limit q → ∞, the entropy becomes related to the overlap with the closest separable state and the geometric measure of entanglement. For any bipartite system, the entropy S1 coincides with the standard entanglement entropy. We analyze the distribution of the minimal entropy for random states of three- and four-qubit systems. In the former case, the distribution of the three-tangle is studied and some of its moments are evaluated, while in the latter case, we analyze the distribution of the hyperdeterminant. The behavior of the maximum overlap of a three-qudit system with the closest separable state is also investigated in the asymptotic limit.

【 授权许可】

Unknown