Linear-Optical Generation of Eigenstates of the Two-Site XY Model

Author(s)
Stefanie Barz, Borivoje Dakic, Yannick Ole Lipp, Frank Verstraete, James D. Whitfield, Philip Walther
Abstract

Much of the anticipation accompanying the development of a quantum computer relates to its application to simulating dynamics of another quantum system of interest. Here, we study the building blocks for simulating quantum spin systems with linear optics. We experimentally generate the eigenstates of the XY Hamiltonian under an external magnetic field. The implemented quantum circuit consists of two CNOT gates, which are realized experimentally by harnessing entanglement from a photon source and applying a CPHASE gate. We tune the ratio of coupling constants and the magnetic field by changing local parameters. This implementation of the XY model using linear quantum optics might open the door to future studies of quenching dynamics using linear optics.

Organisation(s)
Quantum Optics, Quantum Nanophysics and Quantum Information
External organisation(s)
Österreichische Akademie der Wissenschaften (ÖAW)
Journal
Physical Review X
Volume
5
No. of pages
6
ISSN
2160-3308
DOI
https://doi.org/10.1103/PhysRevX.5.021010
Publication date
04-2015
Peer reviewed
Yes
Austrian Fields of Science 2012
103025 Quantum mechanics
Keywords
Portal url
https://ucrisportal.univie.ac.at/en/publications/44cc087f-f766-4199-bc2a-bc6cbb29b8fc