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Researchers have overturned the conventional assumption that environmental dissipation always suppresses quantum chaos, demonstrating instead that it can accelerate information scrambling in specific many-body systems. Using the Yukawa-Sachdev-Ye-Kitaev model, the study reveals a critical threshold where increased energy leakage paradoxically enhances the rate at which quantum information disperses throughout the material. This breakthrough provides new theoretical tools for predicting the behavior of complex open quantum systems and could inform future designs for fault-tolerant quantum processors that must manage environmental interactions effectively.
Researchers Find Dissipation Boosts Quantum Chaos

Dissipation typically suppresses quantum chaos, yet this work reveals an unexpected trend within certain many-body systems. A ratio of approximately two bosons to every p squared fermions defines a boundary where increasing energy leakage actually enhances information scrambling. For interactions involving more than two particles, the rate of this spreading grows with greater dissipation κ.
A new understanding of how information spreads within complex quantum systems enables improved predictions about their behaviour. Working with the Yukawa-Sachdev-Ye-Kitaev (YSYK) model, dissipation surprisingly enhances 'scrambling', which describes the rapid dispersal of quantum information throughout the system. This finding challenges previous expectations suggesting environmental interactions typically hinder this process; specifically for interactions involving more than two particles, scrambling increases…
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