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1071-專題演講-1071107-陳啟東(中研院物研所)

演講活動
張貼人:李明芳公告日期:2018-09-03
 
Time11/7/2018 (Wed.) 14:20~16:20
SpeakerProf.陳啟東(Chii-Dong Chen)
Institute of Physics, Academia Sinica
TitleSuperconducting qubits, graphene optoelectromechanical oscillators and their interactions with microwave photons
Abstract
Quantum computing has emerged as an exciting field because of its potentials in cryptography and application-specific computations. It involves coherent superposition states in a two-level system that gives rise to quantum parallelism and entanglement. The two-level system is the basic building block of a quantum computer and is referred to as quantum bit, or qubit. Superconducting qubits coupled to quantum electromagnetic cavities is an excellent quantum computer platform, in which the qubit states are manipulated and probed through microwave cavities, enabling efficient logic operations and high-fidelity readout. On the other hand, to enable quantum teleportation of qubit information using optical light with frequencies several orders apart, we need a transducer that can parametrically interact with EM cavities as well as optical photons. This way quantum information can be transmitted across different quantum platforms. The photon radiation pressure acting on a mechanical oscillator enables parametric coupling to the cavity, and such hybrid optomechanical system can couple quantum elements of different frequencies.
In this presentation, I will first provide an introduction to the quantum computers. This will be followed by a description of superconducting qubits based on aluminum Josephson junctions and how they are incorporated with GHz superconducting coplanar waveguide circuits. I will then present our recent experimental studies on the excitation behavior of superconducting qubits (Josephson junctions) placed inside a coplanar waveguide cavity. This will be followed by a discuss on another set of experiments in which graphene mechanical oscillators are excited by RF wave in a 3D cavity or a coplanar waveguide cavity. With these, in the future we hope to investigate interactions between three parties, namely, cavity, qubit and mechanical oscillator.
PlaceConference Room (Basement), General Hall, Gongquan Campuses, NTNU


 
最後修改時間:2018-10-30 AM 7:55

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單位簡介

本系的重點研究領域包括:凝態物理、光電與奈米科學、高能與粒子物理、軟凝態物理與生物物理、原分子光學物理、及物理科學教育等。本系前身為臺灣省立師範學院理化系物理組,成立於民國三十五年(1946年)本校創校之始。民國五十一年(1962年)本系獨立成系,民國六十三年(1974年)成立物理研究所碩士班,民國八十年(1991年)成立研究所博士班。長久以來,本系肩負著培育臺灣中等學校物理科師資的重任,但也不忘在物理學術研究上求新求進步。至今本系培育出的學術人才已有一位中研院院士及近百位中研院研究員及大學教授,各行各業的高科技人材更是不勝枚舉。民國八十三年師資培育法改制後,本系已升級為尖端學術研究、科技應用研發、及中學師資培育三者齊備的系所。

  • 國立臺灣師範大學物理系系友會
  • 系友會線上小額捐款
  • 徐有庠盃-臺灣青年學生物理辯論競賽
  • 國際物理奧林匹亞競賽
  • BOSON CLUB
  • 公用場地與儀器設施預約系統
  • 學生實習專區
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