Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Measurement-induced multipartite-entanglement regimes in collective spin systems

Journal Article · · Quantum
 [1];  [2]
  1. Department of Physics, SUPA and University of Strathclyde, Glasgow G4 0NG, United Kingdom, Center for Quantum Information and Control, Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
  2. Institut Quantique and Département de Physique, Université de Sherbrooke, Sherbrooke, Quebec, J1K 2R1, Canada

We study the competing effects of collective generalized measurements and interaction-induced scrambling in the dynamics of an ensemble of spin-1/2 particles at the level of quantum trajectories. This setup can be considered as analogous to the one leading to measurement-induced transitions in quantum circuits. We show that the interplay between collective unitary dynamics and measurements leads to three regimes of the average Quantum Fisher Information (QFI), which is a witness of multipartite entanglement, as a function of the monitoring strength. While both weak and strong measurements lead to extensive QFI density (i.e., individual quantum trajectories yield states displaying Heisenberg scaling), an intermediate regime of classical-like states emerges for all system sizes where the measurement effectively competes with the scrambling dynamics and precludes the development of quantum correlations, leading to sub-Heisenberg-limited states. We characterize these regimes and the crossovers between them using numerical and analytical tools, and discuss the connections between our findings, entanglement phases in monitored many-body systems, and the quantum-to-classical transition.

Research Organization:
National Quantum Information Science (QIS) Research Centers (United States). Quantum Systems Accelerator (QSA)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2281760
Alternate ID(s):
OSTI ID: 2582916
Journal Information:
Quantum, Journal Name: Quantum Vol. 8; ISSN 2521-327X
Publisher:
Verein zur Forderung des Open Access Publizierens in den QuantenwissenschaftenCopyright Statement
Country of Publication:
Austria
Language:
English

References (66)

Entanglement Dynamics in Hybrid Quantum Circuits book April 2022
Generalized phase space method in spin systems-spin coherent state representation journal January 1976
Classical and quantum chaos for a kicked top journal September 1987
Symmetry versus degree of level repulsion for kicked quantum systems journal March 1987
Integration with Respect to the Haar Measure on Unitary, Orthogonal and Symplectic Group journal March 2006
Phase space representation of quantum dynamics journal August 2010
Digital quantum simulation, Trotter errors, and quantum chaos of the kicked top journal September 2019
Measurement-induced quantum phases realized in a trapped-ion quantum computer journal June 2022
Exploring dynamical phase transitions with cold atoms in an optical  cavity journal April 2020
Measurement-induced entanglement and teleportation on a noisy quantum processor journal October 2023
On quantum mean-field models and their quantum annealing journal June 2012
Excited-state quantum phase transitions journal March 2021
Quantifying the Sensitivity to Errors in Analog Quantum Simulation journal November 2020
Quantum Simulators: Architectures and Opportunities journal February 2021
Collective Spin-Light and Light-Mediated Spin-Spin Interactions in an Optical Cavity journal April 2022
Phase-Space Geometry and Optimal State Preparation in Quantum Metrology with Collective Spins journal April 2023
Quantum Simulation for High-Energy Physics journal May 2023
Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet journal December 1940
Simulation of the complex dynamics of mean-field p -spin models using measurement-based quantum feedback control journal August 2020
Bridging entanglement dynamics and chaos in semiclassical systems journal September 2020
Scrambling and quantum chaos indicators from long-time properties of operator distributions journal March 2023
Squeezed spin states journal June 1993
Quantum nondemolition measurement of spin via the paramagnetic Faraday rotation journal December 1999
Many-particle entanglement in two-component Bose-Einstein condensates journal January 2003
Characterizing the entanglement of symmetric many-particle spin-12systems journal February 2003
Measurement-induced spin squeezing in a cavity journal October 2003
Fisher information and multiparticle entanglement journal February 2012
Three-dimensional light-matter interface for collective spin squeezing in atomic ensembles journal March 2014
Measuring the scrambling of quantum information journal October 2016
Entanglement transition from variable-strength weak measurements journal August 2019
Exact dynamics in dual-unitary quantum circuits journal March 2020
Theory of the phase transition in random unitary circuits with measurements journal March 2020
Measurement-induced criticality in random quantum circuits journal March 2020
Dynamical and excited-state quantum phase transitions in collective systems journal July 2022
Multipartite entanglement in the measurement-induced phase transition of the quantum Ising chain journal November 2023
Purification timescales in monitored fermions journal July 2023
Floquet time crystal in the Lipkin-Meshkov-Glick model journal June 2017
Quantum Zeno effect and the many-body entanglement transition journal November 2018
Nonlinear dynamics and quantum chaos of a family of kicked p -spin models journal May 2021
Entanglement and the generation of random states in the quantum chaotic dynamics of kicked coupled tops journal October 2008
Entanglement, Nonlinear Dynamics, and the Heisenberg Limit journal March 2009
Floquet-Engineering Counterdiabatic Protocols in Quantum Many-Body Systems journal August 2019
Simulating Nonlinear Dynamics of Collective Spins via Quantum Measurement and Feedback journal March 2020
Quantum Error Correction in Scrambling Dynamics and Measurement-Induced Phase Transition journal July 2020
Entanglement Entropy Scaling Transition under Competing Monitoring Protocols journal March 2021
Entanglement and Purification Transitions in Non-Hermitian Quantum Mechanics journal April 2021
Measurement-Induced Transition in Long-Range Interacting Quantum Circuits journal January 2022
N -Body Interactions between Trapped Ion Qubits via Spin-Dependent Squeezing journal August 2022
Theory of Dynamical Phase Transitions in Quantum Systems with Symmetry-Breaking Eigenstates journal March 2023
Exponential Shortcut to Measurement-Induced Entanglement Phase Transitions journal July 2023
Statistical distance and the geometry of quantum states journal May 1994
Generation of Spin Squeezing via Continuous Quantum Nondemolition Measurement journal August 2000
Continuous Quantum Measurement and the Emergence of Classical Chaos journal December 2000
Measurement-induced phase transitions in sparse nonlocal scramblers journal March 2022
Floquet time crystals in driven spin systems with all-to-all p -body interactions journal April 2022
Dynamical Purification Phase Transition Induced by Quantum Measurements journal October 2020
Entanglement Phase Transitions in Measurement-Only Dynamics journal February 2021
Measurement-Induced Phase Transitions in the Dynamics of Entanglement journal July 2019
Quantum metrology with nonclassical states of atomic ensembles journal September 2018
Discrete Time Crystals journal March 2020
Random Quantum Circuits journal March 2023
Mean and variance of ratios of proportions from categories of a multinomial distribution journal January 2018
Phase-space methods for simulating the dissipative many-body dynamics of collective spin systems journal February 2021
Many-Body Quantum Zeno Effect and Measurement-Induced Subradiance Transition journal August 2021
Dissipative Floquet Dynamics: from Steady State to Measurement Induced Criticality in Trapped-ion Chains journal February 2022
The Quantum Approximate Optimization Algorithm and the Sherrington-Kirkpatrick Model at Infinite Size journal July 2022

Similar Records

Multipartite entanglement in the one-dimensional spin- 12 Heisenberg antiferromagnet
Journal Article · Thu Feb 16 19:00:00 EST 2023 · Physical Review. B · OSTI ID:2229875

Toward witnessing molecular exciton entanglement from spectroscopy
Journal Article · Tue Oct 19 20:00:00 EDT 2021 · Physical Review A · OSTI ID:1979600

Related Subjects