Systematic Construction of Scarred Many-Body Dynamics in 1D Lattice Models

Area of Science:

• Quantum physics
• Condensed matter theory
• Many-body systems

Background:

• Many-body scarring is a phenomenon where quantum systems exhibit periodic revivals.
• Recent observations of many-body scarring were primarily in Rydberg atom quantum simulators.
• Understanding the underlying mechanisms and generalizing this phenomenon is crucial for quantum dynamics research.

Purpose of the Study:

• To introduce a new family of nonintegrable 1D lattice models.
• To generalize the phenomenon of many-body scarring beyond Rydberg systems.
• To investigate the dynamics and thermalization properties of these novel models.

Main Methods:

• Systematic embedding of single-site unitary dynamics into kinetically constrained many-body systems.
• Numerical demonstrations of robust wave-function revivals.
• Analysis of scarring dynamics, including decomposition into free precession and interacting bottlenecks.

Main Results:

• A new family of nonintegrable 1D lattice models with robust periodic revivals was introduced.
• These models generalize many-body scarring and include kinetically constrained quantum clock models.
• Scarring dynamics were shown to involve a period of nearly free clock precession followed by an interacting bottleneck, explaining slow thermalization.

Conclusions:

• The introduced models provide a new platform for studying many-body scarring.
• The decomposition of scarring dynamics offers insights into anomalously slow thermalization in quantum systems.
• This work generalizes many-body scarring and expands its relevance to broader quantum many-body systems.