Parent Lindbladians for Matrix Product Density Operators

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• Yuhan Liu
• Thursday 20 March 2025, 15:30-16:30
• MR2.

If you have a question about this talk, please contact Laurens Lootens.

Understanding quantum phases of matter is a fundamental goal in physics. For pure states, the representatives of phases are the ground states of locally interacting Hamiltonians, which are also renormalization fixed points (RFPs). These RFP states are exactly described by tensor networks. Extending this framework to mixed states, matrix product density operators (MPDOs) which are RFPs are believed to encapsulate mixed-state phases of matter in one dimension. However, it remains an open question whether, by analogy, such MPDO RF Ps can be realized as steady states of local Lindbladians. In this work, we resolve this question by analytically constructing parent Lindbladians for MPDO RF Ps. These Lindbladians are local, frustration-free, and exhibit minimal steady-state degeneracy. Interestingly, we find that parent Lindbladians possess a rich structure, including non-commutativity for certain classes of RFPs, distinguishing them from their Hamiltonian counterparts.

This talk is part of the CQIF Seminar series.

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