308 citations · 1.8k across the 76 of their papers we have counts for
4 papers · 2 filters
Ground state entanglement constrains low-energy excitations
Isaac H. Kim, Benjamin J. Brown
For a general quantum many-body system, we show that its ground-state entanglement imposes a fundamental constraint on the low-energy excitations. For two-dimensional systems, our…
Reconstructing quantum states from local data
Brian Swingle, Isaac H. Kim
We consider the problem of reconstructing global quantum states from local data. Because the reconstruction problem has many solutions in general, we consider the reconstructed sta…
On the informational completeness of local observables
Isaac H. Kim
For a general multipartite quantum state, we formulate a locally checkable condition, under which the expectation values of certain nonlocal observables are completely determined b…
Bounds on the Concavity of Quantum Entropy
Isaac H. Kim, Mary Beth Ruskai
We give new upper and lower bounds on the concavity of quantum entropy. Comparisons are given with other results in the literature.