Special QM Seminar Speaker Oles Shtanko (JQI and QuICS, UMD College Park) Friday, December 4 at 2:00 pm

Time/Venue Friday, December 4 at 2:00 pm Pacific Time via this Zoom link:
Norman Yao
Title Complexity Transitions in Open Many-Body Systems
Abstract Under the environment’s action, open quantum many-body systems are often transitioning into a classical regime described by a polynomial number of parameters and simulable by a classical algorithm. Understanding the conditions of this transition is crucial for quantum computing and classifying open quantum phases. In my talk, I will explore this phenomenon using two different measures: computational hardness and quantum entanglement. I will propose free fermions with quadratic jump operators as a promising candidate for the complexity transition. I also show that, under an anticoncentration assumption, the transition in entanglement in monitored random circuits maps to a disordered classical phase transition.

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