%0 Journal Article
%T Constructive Interference Between Disordered Couplings Enhances Multiparty Entanglement in Quantum Heisenberg Spin Glass Models
%A Utkarsh Mishra
%A Debraj Rakshit
%A R. Prabhu
%A Aditi Sen De
%A Ujjwal Sen
%J Physics
%D 2014
%I arXiv
%X We probe one-dimensional arrays of quantum spin-1/2 particles, governed by the Heisenberg spin glass Hamiltonian with natural or engineered quenched disordered couplings in an external magnetic field. We find that these systems allow the order from disorder phenomenon -- disorder-induced enhancement -- for magnetization, classical correlators, and bipartite as well as multipartite entanglement, wherein a disordered system has a higher value of the quenched averaged physical observable than in the corresponding ordered system. Moreover, the system also harbors parameter ranges where simultaneous application of independent quenched disorders results in order from disorder, while the same is absent with individual application of the same disorders -- we term the phenomenon as constructive interference and the corresponding parameter stretches as the Venus regions. Interestingly, constructive interference has only been observed for multiparty entanglement and is absent for the single- and two-party observables.
%U http://arxiv.org/abs/1408.0179v1