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4 papers · 2 filters
Negative Power Spectra in Quantum Field Theory
Jen-Tsung Hsiang, Chun-Hsien Wu, L. H. Ford
We consider the spatial power spectra associated with fluctuations of quadratic operators in field theory, such as quantum stress tensor components. We show that the power spectrum…
Quantum codes give counterexamples to the unique pre-image conjecture of the N-representability problem
Samuel A. Ocko, Xie Chen, Bei Zeng +4
It is well known that the ground state energy of many-particle Hamiltonians involving only 2-body interactions can be obtained using constrained optimizations over density matrices…
Probability distributions of smeared quantum stress tensors
Christopher J. Fewster, L. H. Ford, Thomas A. Roman
We obtain in closed form the probability distribution for individual measurements of the stress-energy tensor of two-dimensional conformal field theory in the vacuum state, smeared…
The -divergence and Mixing times of quantum Markov processes
K. Temme, M. J. Kastoryano, M. B. Ruskai +2
We introduce quantum versions of the -divergence, provide a detailed analysis of their properties, and apply them in the investigation of mixing times of quantum Markov proces…