Multipartite entanglement in the measurement-induced phase transition of the quantum Ising chain
Alessio Paviglianiti, Alessandro Silva
Abstract
Quantum systems subject to external monitoring manifest a rich phenomenology in their entanglement properties. Here, the authors use quantum Fisher information to uncover a multipartite entanglement phase transition in the monitored quantum Ising chain. By changing the measurement rate, they observe a shift from bounded to long-range multipartiteness of quantum correlations. They show that the quantum Fisher information displays distinct behavior from the entanglement entropy, and the two outline different phase boundaries.
Topics & Concepts
Quantum entanglementQuantum discordQuantum phase transitionPhysicsMultipartite entanglementIsing modelQuantum mechanicsW stateQuantumQuantum critical pointStatistical physicsSquashed entanglementAmplitude damping channelQuantum phasesQuantum many-body systemsQuantum Information and CryptographyQuantum Computing Algorithms and Architecture