How confused can an entanglement witness be to be still persuasive

Abstract

Detection of entangled states is essential in both fundamental and applied quantum physics. However, this task proves to be challenging especially for general quantum states. One can execute full state tomography but this method is time demanding especially in complex systems. Other approaches use entanglement witnesses, these methods tend to be less demanding but lack reliability. Here, we demonstrate that ANN -- artificial neural networks provide a balance between both approaches. In this paper, we make a comparison of ANN performance against witness-based methods for random general 2-qubit quantum states without any prior information on the states. Furthermore, we apply our approach to real experimental data set.

5 pages, 4 figures

References in corpus (10)

• Experimental quantum teleportation
• Taming multiparticle entanglement
• Experimental investigation of the dynamics of entanglement: Sudden death, complementarity, and continuous monitoring of the environment
• Estimating entanglement measures in experiments
• Measuring Multipartite Concurrence with a Single Factorizable Observable
• Estimating entanglement monotones with a generalization of the Wootters formula
• Bell nonlocality and fully-entangled fraction measured in an entanglement-swapping device without quantum state tomography
• Method for universal detection of two-photon polarization entanglement
• Construction of optimal witness for unknown two-qubit entanglement
• Collectibility for Mixed Quantum States