Experimentally Accessible Lower Bounds for Genuine Multipartite Entanglement and Coherence Measures
Yue Dai, Yuli Dong, Zhenyu Xu, Wen‐Long You, Chengjie Zhang, Otfried Gühne
Abstract
Experimentally quantifying entanglement and coherence is extremely important in quantum information processing. In a multipartite quantum system, usually the fidelity of the system's state compared to a target state is measured to detect its entanglement. The authors present a fidelity-based method to derive experimentally accessible lower bounds for measures of genuine multipartite entanglement and coherence, allowing quick quantification of system states without quantum state tomography in experiments. The method works generally, for several entanglement measures and coherence measures, and examples of real experimental states are analyzed in detail.
Topics & Concepts
MultipartiteQuantum entanglementMultipartite entanglementCoherence (philosophical gambling strategy)FidelityW stateStatistical physicsSquashed entanglementQuantum stateQuantum mechanicsState (computer science)Computer scienceQuantumPhysicsMathematicsAlgorithmTelecommunicationsQuantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum Computing Algorithms and Architecture