QUANTUM SYSTEMS

Nov 21 2025SCIENCE

Exploring Quantum Systems: Steady States and Eigenstate Behavior

In the world of quantum physics, understanding how systems behave is crucial. One key idea is the Eigenstate Thermalization Hypothesis (ETH). It suggests that individual quantum states can represent the thermal properties of a system. But what about systems that are always changing, not in balance? This is where the Gorini-Kossakowski-Lindblad-Sudarshan (GKLS) Master...

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Jun 13 2025SCIENCE

Quantum Systems: The Memory Effect

Quantum systems in the condensed phase often show complex behaviors. This is due to a memory effect called non-Markovianity. Unlike its simpler, memoryless counterpart, non-Markovianity makes these systems harder to understand. Many chemical systems have shown signs of this complex behavior through computer simulations. However, the exact role of memory in these dyna...

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Jan 13 2025SCIENCE

The Resurrection of LSM Theorem in Open Quantum Systems

You know how the LSM theorem works in closed systems, right? It's like a rule that says certain spin chains can't have a single, non-degenerate ground state. But what happens when these systems aren't closed anymore? They interact with their environment, and things get a bit messy. Imagine you're looking at an open quantum system. It's like a party where the guests ...

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