|Title||Measuring the Renyi entropy of a two-site Fermi-Hubbard model on a trapped ion quantum computer|
|Publication Type||Journal Article|
|Year of Publication||2018|
|Authors||N.. M. Linke, S.. Johri, C.. Figgatt, K.. A. Landsman, A.. Y. Matsuura, and C.. Monroe|
|Journal||PHYSICAL REVIEW A|
|Date Published||NOV 26|
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.