@article { ISI:000451329500012, title = {Measuring the Renyi entropy of a two-site Fermi-Hubbard model on a trapped ion quantum computer}, journal = {PHYSICAL REVIEW A}, volume = {98}, number = {5}, year = {2018}, month = {NOV 26}, pages = {052334}, abstract = {The efficient simulation of correlated quantum systems is a promising near-term application of quantum computers. Here, we present a measurement of the second Renyi entropy of the ground state of the two-site Fermi-Hubbard model on a five-qubit programmable quantum computer based on trapped ions. Our work illustrates the extraction of a nonlinear characteristic of a quantum state using a controlled-swap gate acting on two copies of the state. This scalable measurement of entanglement on a universal quantum computer will, with more qubits, provide insights into many-body quantum systems that are impossible to simulate on classical computers.}, issn = {2469-9926}, doi = {10.1103/PhysRevA.98.052334}, author = {Linke, N. M. and Johri, S. and Figgatt, C. and Landsman, K. A. and Matsuura, A. Y. and Monroe, C.} }