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Related Experiment Video

Updated: Jan 14, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Information scrambling in bosonic Gaussian dynamics.

Ali Mollabashi¹, Saleh Rahimi-Keshari¹

¹Institute for Research in Fundamental Sciences, School of Quantum Physics and Matter, (IPM), Tehran 1953833511, Iran.

Physical Review. E

|October 21, 2025

Summary

This study reveals that bosonic systems with Gaussian dynamics exhibit information scrambling, mirroring chaotic systems despite being integrable. Randomness in their Hamiltonians leads to unique entanglement and information dynamics.

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Area of Science:

Quantum Information Science
Condensed Matter Physics
Quantum Dynamics

Background:

Information scrambling is a key concept in quantum mechanics, describing how quantum information spreads.
Bosonic systems and Gaussian unitary evolution are fundamental in quantum information processing.

Purpose of the Study:

To investigate information scrambling dynamics in bosonic systems under Gaussian unitary evolution.
To analyze the role of Hamiltonian randomness in entanglement and information dynamics.

Main Methods:

Studying entanglement dynamics of disjoint blocks under Gaussian random local dynamics.
Analyzing tripartite mutual information saturation under random Hamiltonians.

Main Results:

Observed disappearance of the memory effect in entanglement dynamics for initial Gaussian states.
Showed tripartite mutual information saturates at large negative values due to Hamiltonian randomness.
Identified information-scrambling diagnostics in integrable systems that resemble those in chaotic systems.

Conclusions:

Integrable bosonic systems with Gaussian dynamics can exhibit signatures of information scrambling.
Hamiltonian randomness plays a crucial role in the observed dynamics.
Results offer insights into continuous-variable systems for quantum information processing.