Experimental realization of multipartite entanglement via quantum Fisher information in a uniform antiferromagnetic quantum spin chain
George Mathew, Saulo L. L. Silva, Anil Jain, Arya Mohan, D. T. Adroja, V. G. Sakai, C. V. Tomy, Alok Banerjee, Rajendar Goreti, Aswathi V. N., Ranjit Singh, D. Jaiswal-Nagar
Abstract
This paper reports on the direct detection of multipartite entanglement in a quantum-many body system. The authors observe that quantum Fisher information survives to temperatures above the exchange coupling constant of the system.
Topics & Concepts
Quantum entanglementMultipartiteRealization (probability)Multipartite entanglementQuantum mechanicsPhysicsW stateQuantumAntiferromagnetismQuantum informationSpin (aerodynamics)Chain (unit)Fisher informationQuantum teleportationQuantum discordCoupling (piping)Amplitude damping channelConstant (computer programming)Squashed entanglementQuantum channelCoupling constantStatistical physicsMathematicsQuantum information processingQuantum stateZero (linguistics)Theoretical physicsQuantum many-body systemsQuantum Information and CryptographyPhysics of Superconductivity and Magnetism