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Title: Quantum Dynamics of a Few-Photon Parametric Oscillator

Abstract

Modulating the frequency of a harmonic oscillator at nearly twice its natural frequency leads to amplification and self-oscillation. Above the oscillation threshold and in the presence of a nonlinearity, the field settles into a coherent oscillating state with a well-defined phase of either 0 or π. We demonstrate a quantum parametric oscillator operating at microwave frequencies and drive it into oscillating states containing only a few photons. The small number of photons present in the system and the coherent nature of the nonlinearity prevent the environment from learning the randomly chosen phase of the oscillator. This result allows the system to oscillate briefly in a quantum superposition of both phases at once, effectively generating a nonclassical Schrödinger’s cat state. We characterize the dynamics and states of the system by analyzing the output field emitted by the oscillator and implementing quantum state tomography suited for nonlinear resonators. By demonstrating a quantum parametric oscillator and the requisite techniques for characterizing its quantum state, we set the groundwork for new schemes of quantum and classical information processing and extend the reach of these ubiquitous devices deep into the quantum regime.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Univ., CA (United States); Quantum Information Science (QIS)
Sponsoring Org.:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1525341
Alternate Identifier(s):
OSTI ID: 1574905
Grant/Contract Number:  
SC0019174
Resource Type:
Published Article
Journal Name:
Physical Review X
Additional Journal Information:
Journal Name: Physical Review X Journal Volume: 9 Journal Issue: 2; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Quantum Information Science (QIS)

Citation Formats

Wang, Zhaoyou, Pechal, Marek, Wollack, E. Alex, Arrangoiz-Arriola, Patricio, Gao, Maodong, Lee, Nathan R., and Safavi-Naeini, Amir H. Quantum Dynamics of a Few-Photon Parametric Oscillator. United States: N. p., 2019. Web. doi:10.1103/PhysRevX.9.021049.
Wang, Zhaoyou, Pechal, Marek, Wollack, E. Alex, Arrangoiz-Arriola, Patricio, Gao, Maodong, Lee, Nathan R., & Safavi-Naeini, Amir H. Quantum Dynamics of a Few-Photon Parametric Oscillator. United States. doi:10.1103/PhysRevX.9.021049.
Wang, Zhaoyou, Pechal, Marek, Wollack, E. Alex, Arrangoiz-Arriola, Patricio, Gao, Maodong, Lee, Nathan R., and Safavi-Naeini, Amir H. Fri . "Quantum Dynamics of a Few-Photon Parametric Oscillator". United States. doi:10.1103/PhysRevX.9.021049.
@article{osti_1525341,
title = {Quantum Dynamics of a Few-Photon Parametric Oscillator},
author = {Wang, Zhaoyou and Pechal, Marek and Wollack, E. Alex and Arrangoiz-Arriola, Patricio and Gao, Maodong and Lee, Nathan R. and Safavi-Naeini, Amir H.},
abstractNote = {Modulating the frequency of a harmonic oscillator at nearly twice its natural frequency leads to amplification and self-oscillation. Above the oscillation threshold and in the presence of a nonlinearity, the field settles into a coherent oscillating state with a well-defined phase of either 0 or π. We demonstrate a quantum parametric oscillator operating at microwave frequencies and drive it into oscillating states containing only a few photons. The small number of photons present in the system and the coherent nature of the nonlinearity prevent the environment from learning the randomly chosen phase of the oscillator. This result allows the system to oscillate briefly in a quantum superposition of both phases at once, effectively generating a nonclassical Schrödinger’s cat state. We characterize the dynamics and states of the system by analyzing the output field emitted by the oscillator and implementing quantum state tomography suited for nonlinear resonators. By demonstrating a quantum parametric oscillator and the requisite techniques for characterizing its quantum state, we set the groundwork for new schemes of quantum and classical information processing and extend the reach of these ubiquitous devices deep into the quantum regime.},
doi = {10.1103/PhysRevX.9.021049},
journal = {Physical Review X},
number = 2,
volume = 9,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevX.9.021049

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