Slow Photons through Brillouin Scattering in Nanoscale Wires

by Prof. Hashem Zoubi

Holon Institute of Technology, Department of Physics

at Quantum optics seminar

Wed, 07 May 2025, 16:00
Zoom Only

Abstract

Zoom link: https://us02web.zoom.us/j/89350921449?pwd=QEyQSbCNxmJ3ckXoAnPbq9QYdlbCbP.1

Abstract:
Realizing the promise of quantum computers is dependent on the development of physical systems that can process quantum information. While several candidates have been suggested in recent years, each with its set of advantages and disadvantages, none fulfil the complete set of criteria for achieving efficient quantum computers. We introduce nanophotonic wires as a strong candidate for the physical implementation of quantum information processing using photons [1,2]. Nanostructures are made of solid components and serve as quantum devices that can be easily integrated into on-chip platforms. Photons inside nanoscale wires have been shown to strongly interact, making them suitable for quantum information processing. Our study serves as an important step toward an all-optical on-chip platform. We develop a quantum theory for interacting photons and phonons in nanophotonic waveguides made of dielectric materials, where the Brillouin interaction covers radiation pressure and electrostrictive interactions on equal footing [1]. Our study extends conventional quantum optomechanics into continuum quantum optomechanics. We explore the possibility of achieving a significant nonlinear phase shift among photons propagating in nanoscale wires exploiting interactions among photons that are mediated by vibrational modes and induced through stimulated Brillouin scattering [2]. We introduce a configuration that allows slowing down the photons by several orders of magnitude via Brillouin scattering involving sound waves in the presence of pump fields [8]. The nonlinear phase among two counter-propagating photons can be used to realize a deterministic quantum logic gate [6]. Such photon-phonon interactions are exploited in order to generate a coherent mix of photons and phonons with manifest quantum phenomena [3-7].

References
[1] H. Zoubi, K. Hammerer, Phys. Rev. A 94, 053827 (2016).
[2] H. Zoubi, K. Hammerer, Phys. Rev. Lett. 119, 123602 (2017).
[3] H. Zoubi, J. Opt. 20, 095001 (2018).
[4] H. Zoubi, J. Opt. 21, 065202 (2019).
[5] H. Zoubi, Phys. Rev. A 101, 043803 (2020).
[6] H. Zoubi, Phys. Rev. A 104, 063510 (2021).
[7] H. Zoubi, Eur. Phys. J. D 77, 171 (2023).
[8] H. Zoubi, K. Hammerer, Front. Quantum sci. Tech. 3, 1437933 (2024).

Created on 04-05-2025 by Folman, Ron (folman)
Updaded on 04-05-2025 by Folman, Ron (folman)