ナモメカニカルオシレータのエネルギーレベルを解く

Patricio Arrangoiz-Arriola^1,2, E Alex Wollack^1,2, Zhaoyou Wang^1,2

¹Department of Applied Physics, Stanford University, Stanford, CA, USA.

Nature

|July 26, 2019

まとめ

科学者は超伝導量子ビットを用いてナノメカニカルオシレータの量子化されたエネルギーを検出しましたこの量子音響のプラットフォームは運動エネルギーの正確な測定を可能にし量子センサーの道を開きます

科学分野:

量子音学について
量子電力学
固体量子システム

背景:

機械的な振動器の量子的な性質は,通常,古典的な運動によって隠されています.
機械システムの量子化されたエネルギーを測定するには,高精度の装置が必要です.
前回の実験では光子の分散度が示されましたが機械的な振動器は示されませんでした

研究の目的:

量子化されたエネルギーレベルの解像度をナモメカニカルオシレータで実証する.
ナノメカニカル共振器と超伝導量子ビットを統合したハイブリッドプラットフォームを開発する.
人工原子を使って運動エネルギーを感知する.

主な方法:

ナモメカニカルピエゾ電気共鳴器とマイクロ波超伝導クビットを組み合わせたハイブリッドチップの製造.
リゾーナントパルスを用いたナモメカニカルレゾーナータのフォノン刺激.
量子ビットの振動スペクトルでフォノン数による周波数変化を観測する

主要な成果:

磁気振動器のエネルギー構造を解明しました
量子ビットのフォノン数に依存する周波数シフトは,量子ビットの線幅の約5倍である.
完全に統合された量子音響プラットフォームを強く結合し,高一貫性を示した.

結論:

この実験では,機械的な振動器のエネルギー定量化の感知が成功しました.
開発されたハイブリッドプラットフォームは,量子音学と量子センシングの有望なアプローチを提供します.
将来の改良により量子非破壊測定とチップスケールの量子情報処理が可能になります

さらに関連する動画

06:34

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

16.9K

08:02

Generation of Local CA1 γ Oscillations by Tetanic Stimulation

Published on: August 14, 2015

9.5K

関連する概念動画

01:35

Light as Energy

95.5K

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...

95.5K

01:30

Oscillations In An LC Circuit

3.0K

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by

3.0K

01:06

Forced Oscillations

7.7K

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.

7.7K

04:10

What is Energy?

58.4K

The universe is composed of matter in different forms, and all forms of matter contain energy. The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized...

58.4K

01:21

Free Energy

51.8K

Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break...

51.8K

01:07

Damped Oscillations

6.8K

In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...