Controlling Many-Body Entanglement with an External Field

Zhiyong Liu, Kui-Hua Gong

Jincheng Zhang

This paper investigates the topological excitation of multi-body quantum entanglement as a novel approach to quantum state manipulation. We propose a mechanism utilizing external field control to induce changes in the topology of multi-body entanglement, thereby generating new quantum states. These states are then leveraged for quantum information manipulation. The core claim centers on the ability to control multi-body quantum entanglement's topology to trigger new quantum states and, consequently, enable quantum information control. This approach offers a distinct excitation methodology compared to conventional techniques, representing a significant step towards practical quantum information processing. The theoretical framework presented herein provides a foundation for future research and development in this area. We explore the fundamental aspects of topological entanglement and demonstrate the potential for harnessing its dynamic properties.

Gabriel Bester, Alex Zunger

The degree of entanglement of an electron with a hole in a vertically coupled self-assembled dot molecule is shown to be tunable by an external electric field. Using atomistic pseudopotential calculations followed by a configuration interaction many-body treatment of correlations, we calculate the electronic states, degree of entanglement, and optical absorption. We offer a way to spectroscopically detect the magnitude of electric field needed to maximize the entanglement.

Frank Verstraete

Jean Michel Sellier, Kristina G. Kapanova

Abstract Recently a new formulation of quantum mechanics has been introduced, based on signed classical field‐less particles interacting with an external field by means of only creation and annihilation events. In this article, we extend this novel theory to the case of many‐body problems. We show that, when restricted to spatial finite domains and discrete momentum space, the proposed extended theory is equivalent to the time‐dependent many‐body Wigner Monte Carlo method. In this new picture, the treatment of entangled systems comes naturally and, therefore, we apply it to the study of quantum entangled systems. The latter is represented in terms of two Gaussian wave packets moving in opposite directions. We introduce the presence of a dissipative background and show how the entanglement is affected by different (controlled) configurations.