In the past few years, networks of optical parametric oscillators (OPOs) have been successfully used to simulate the classical Ising Hamiltonian leading to a platform that may be used as a special-purpose computer. In this talk, we will overview the fundamental properties of OPOs at degeneracy that enable simulation of the Ising Hamiltonian [1-3]. We will discuss the concept of time-multiplexed OPO networks , which in combination with the measurement-feedback architecture, has led to a special implementation of large-scale Ising machines  that are being studied extensively . We will also overview the potentials of OPO networks in realization of a wide range of quantum states, from the well-known squeezed vacuum and multi-mode entangled states to less-explored highly-desired Cat states and present a potential path toward scalable quantum photonic engineering using them. We will discuss recent numerical studies of ultra-short pulse OPOs in the highly-nonlinear quantum regime  and present some of the practical benefits and challenges associated with using them as the building block of a quantum photonic platform.
 A. Marandi et al., “Network of time-multiplexed optical parametric oscillators as a coherent Ising machine,” Nature Photonics 8.12 (2014): 937-942.
 P. McMahon, A. Marandi* et al., “A fully programmable 100-spin coherent Ising machine with all-to-all connections,” Science 354.6312 (2016): 614-617.
 R. Hamerly, T. Inagaki, P.L. McMahon*, et al., “Experimental investigation of performance differences between Coherent Ising Machines and a quantum annealer,” arXiv:1805.05217 (2018).
 T. Onodera*, E. Ng*, et al., “Nonlinear quantum behavior of ultrashort-pulse optical parametric oscillators,” arXiv:1811.10583 (2018).
Presented at: BOULDER CAMPUS / 11:00 AM MT / 1-1107
VTC from Boulder: Gaithersburg / 1:00 PM / Dining Rooms A & B
Alireza Marandi is an Assistant Professor of Electrical Engineering and Applied Physics at Caltech. Before joining Caltech, he held positions as a postdoctoral scholar and a research engineer at Stanford University. He was also a visiting scientist at the National Institute of Informatics in Japan, and a senior engineer in the Advanced Technology Group of Dolby Laboratories. He received his PhD from Stanford University in 2013, his MS from the University of Victoria, Canada, and his BS from the University of Tehran, Iran, all in electrical engineering. His research is focused on fundamental technological developments in nonlinear photonics. His work explores the frontiers of ultrafast optics, optical frequency combs, quantum optics, optical information processing, mid-infrared photonics, and laser spectroscopy.
Outside attendees need to contact Barry Schneider in order to obtain the site badges required to enter NIST grounds and to attend the seminar. 24 hour notice is required for US citizens and 3 days for non-US citizens. Please contact firstname.lastname@example.org to be added to the visitor list. Visitors must check in at the NIST Visitor Center to pick up their badges. A photo ID is required for US citizens and a passport or green card for foreign nationals.