18 citations · 47 across the 7 of their papers we have counts for
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quant-ph2021★ 1 cited
Computational Complexity of the Ground State Energy Density Problem
James D. Watson, Toby S. Cubitt
We study the complexity of finding the ground state energy density of a local Hamiltonian on a lattice in the thermodynamic limit of infinite lattice size. We formulate this rigoro…
quant-ph2021★ 1 cited
The Complexity of Approximating Critical Points of Quantum Phase Transitions
James D. Watson, Johannes Bausch
Phase diagrams chart material properties with respect to one or more external or internal parameters such as pressure or magnetisation; as such, they play a fundamental role in man…
quant-ph2021★ 10 cited
Uncomputably Complex Renormalisation Group Flows
James D. Watson, Emilio Onorati, Toby S. Cubitt
Renormalisation group (RG) methods provide one of the most important techniques for analysing the physics of many-body systems, both analytically and numerically. By iterating an R…