Being extremely important resources in quantum information and computation, it is vital to efficiently detect and properly characterize entangled states. We analyze in this work the problem of entanglement detection for arbitrary spin systems. It is demonstrated how a single measurement of the squared total spin can probabilistically discern separable from… (More)

Optimal detection of metrologically useful entanglement

I. Apellaniz, M. Kleinmann, O. Gühne, G. Tóth

arXiv, 1511,

2015

Macroscopic singlet states for gradient magnetometry

I. Urizar-Lanz, P. Hyllus, I. L. Egusquiza, M. W. Mitchell, G. Tóth

Phys. Rev. A

2013

Evidence for entanglement at high temperatures in an engineered molecular magnet

M. S. Reis, S. Soriano, A. M. dos Santos, B. C. Sales, D. O. Soares-Pinto

Europhys. Lett. 100,

2012

a(n, k) is the number of ways to choose integers i, j from 0, 1,..., k such that the inequality |i − j| ≤ n≤ i + j is satisfied. Date of access 01/11/2015