27 citations · 64 across the 9 of their papers we have counts for
7 papers · 2 filters
Long-range entangled criticality from coherent errors
Amir-Reza Negari, Subhayan Sahu, Jan Behrends +2
We find that coherent error can induce a phase transition from the clean surface code phase into an extended long-range entangled critical regime with diverging Markov length. To d…
Instability of Markov chains under infinitesimal coherent dissipation
Amir-Reza Negari, Yijian Zou, Timothy H. Hsieh
Under local Lindbladian evolution, the growth of conditional mutual information and its associated Markov length scale is not limited by Lieb-Robinson bounds, yet it has been uncle…
Nonadditivity in fermionic quantum Shannon theory
Farzin Salek, Amir-Reza Negari, Graeme Smith +2
We study collective state preparation and channel encoding in fermionic systems under parity superselection and composition governed by the canonical anticommutation relations. For…
Entanglement of purification for Werner states: canonical purification and nonadditivity
Zahra Baghali Khanian, Amir-Reza Negari
We prove that the von Neumann entanglement of purification is nonadditive. For two-qubit Werner states with singlet weight , we show that canonical purifica…
Approximation theorems for fermionic Gaussian states
Amir-Reza Negari, Farzin Salek, Zoltán Zimborás +3
A recurring principle in many-body physics is that sufficiently distributed interactions or correlations lead to an effectively mean-field description. For fermionic Gaussian state…
Rényi Entanglement of Purification Is Non-additive
Amir-Reza Negari, Zahra Baghali Khanian
Entanglement of purification is a fundamental measure of total correlations whose additivity remains unresolved. We study its additivity for classical states on two qubits at diffe…
Critical non-equilibrium phases from noisy topological memories
Amir-Reza Negari, Subhayan Sahu, Jan Behrends +2
We demonstrate the existence of an extended non-equilibrium critical phase, characterized by sub-exponential decay of conditional mutual information (CMI), in the surface code subj…