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quant-ph2026
-VQE: Excited-state preparation of quantum many-body scars with shallow circuits
Eoin Carolan, Nathan Keenan, Gabriele Cenedese +1
We present and benchmark a type of variational quantum eigensolver (VQE), which we denote -VQE. It is designed to target mid-spectrum eigenstates and prepare quantum many-body…
quant-ph2024
Operator growth and spread complexity in open quantum systems
Eoin Carolan, Anthony Kiely, Steve Campbell +1
Commonly, the notion of "quantum chaos'' refers to the fast scrambling of information throughout complex quantum systems undergoing unitary evolution. Motivated by the Krylov compl…