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Friday, October 25, 2019
12:00 PM - 1:00 PM
East Bridge 201 (Richard P. Feynman Lecture Hall)

IQIM Postdoctoral and Graduate Student Seminar

Networks of Optical Parametric Oscillators: From Ising Machines to Quantum Photonic Engineering
Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, Caltech,

Note: This week only, lunch will be provided beginning at 11:45 on the lawn outside E. Bridge. The seminar talk will begin at ~12:15 in 201 E. Bridge.

Abstract: 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. We will discuss the concept of time-multiplexed OPO networks [1], which in combination with the measurement-feedback architecture, has led to a special implementation of large-scale Ising machines [2, 3] that are being studied extensively [4]. 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 [5] and present some of the practical benefits and challenges associated with using them as the building block of a quantum photonic platform.

[1] Nature Photonics 8.12 (2014): 937-942.

[2] Science 354.6312 (2016): 614-617.

[3] Science 354.6312 (2016): 603-606.

[4] Science Advances 5, eaau0823 (2019).

[5] arXiv:1811.10583 (2018)

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at