collaborators

6 papers

hep-th2026

Sharp Transitions for Subsystem Complexity

Yale Fan, Nicholas Hunter-Jones, Andreas Karch +1

The circuit complexity of time-evolved pure quantum states grows linearly in time for an exponentially long time. This behavior has been proven in certain models, is conjectured to…

quant-ph2026

Demonstrating an unconditional separation between quantum and classical information resources

William Kretschmer, Sabee Grewal, Matthew DeCross +8

A longstanding goal in quantum information science is to demonstrate quantum computations that cannot be feasibly reproduced on a classical computer. Such demonstrations mark major…

cond-mat.stat-mech2026

Late-time ensembles of quantum states in quantum chaotic systems

Souradeep Ghosh, Christopher M. Langlett, Nicholas Hunter-Jones +1

We study the universal structure of late-time ensembles obtained from unitary dynamics in quantum chaotic systems with symmetries, such as charge or energy conservation. We find th…

quant-ph2026

Ideal random quantum circuits pass the LXEB test

Nicholas Hunter-Jones, Jonas Haferkamp

We show that noiseless random quantum circuits pass the linear cross-entropy benchmark (LXEB) test with high probability. If the circuits are linear depth, and thus form unitary 4-…

cond-mat.stat-mech2025

Randomization Times under Quantum Chaotic Hamiltonian Evolution

Souradeep Ghosh, Nicholas Hunter-Jones, Joaquin F. Rodriguez-Nieva

Randomness generation through quantum-chaotic evolution underpins foundational questions in statistical mechanics and applications across quantum information science, including ben…

quant-ph2025

Two classes of quantum spin systems that are gapped on any bounded-degree graph

Nicholas Hunter-Jones, Marius Lemm

We study translation-invariant quantum spin Hamiltonians on general graphs with non-commuting interactions either given by (i) a random rank- projection or (ii) Haar projectors.…