Abstract
A pure quantum state of subsystems with local dimension is called a -uniform state if every reduction to qudits is maximally mixed. Based on a special class of combinatorial design, namely irredundant orthogonal arrays, we show the existence of 2-uniform -qudit states when and is a prime power other than 2. In addition, given any Hadamard matrix of order greater than 4, we demonstrate how it can be used to construct 3-uniform multiqubit states. In fact, we find that there exists some 3-uniform -qubit when except case . These give an answer to a question posed by Goyeneche et al. [Phys. Rev. A 90, 022316 (2014)]. Furthermore, starting from a minimal support -uniform state, we show how to generate an orthogonal basis consisting of -uniform states. At last, we derive a series of -uniform -qudit states from a single -uniform -qudit state. The -uniform states are good candidates among the multipartite entangled states.
- Received 28 December 2018
DOI:https://doi.org/10.1103/PhysRevA.99.042332
©2019 American Physical Society