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関連する概念動画

The de Broglie Wavelength02:32

The de Broglie Wavelength

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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The Quantum-Mechanical Model of an Atom02:45

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
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Oscillations about an Equilibrium Position01:04

Oscillations about an Equilibrium Position

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Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so...
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Electric Potential Energy of Two Point Charges01:12

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The electric potential energy of a test charge in a uniform eclectic field can be generalized to any electric field produced by static charge distribution. Consider a positive test charge in an electric field produced by another static positive charge. If the test charge is moved away from the static charge, then the electric field does the positive work on the test charge, and the electric potential energy of the test charge decreases as it moves away from the static charge. Here the electric...
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Oscillations In An LC Circuit01:30

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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
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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結合された2つの充電量子ビットにおける量子振動.

Yu A Pashkin1, T Yamamoto, O Astafiev

  • 1The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan.

Nature
|February 21, 2003
PubMed
まとめ
この要約は機械生成です。

研究者らは,2つの電荷量子ビットと結合したジョセフソン回路を実証し,これは実用的な量子コンピュータを構築するための重要なステップである. この研究は,複数の固体量子ビットをつなぐ可能性を示し,絡み合った2量子ビット状態のヒントを示しています.

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関連する実験動画

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科学分野:

  • 量子コンピューティング
  • 固体物理学 固体物理学とは
  • 超伝導性は超伝導性である.

背景:

  • 実践的な量子コンピュータには,結合量子システム (qubits) が必要です.
  • 固体量子ビット,特にジョセフソン・ジャンクションを使用する量子ビットは,統合量子デバイスにとって有望である.
  • 以前の研究は個々の量子ビットに焦点を当て,マルチ量子ビットゲートに関する実験報告が欠けていました.

研究 の 目的:

  • 複数の固体量子ビットのカップリングを実証するために.
  • 2つの結合された電荷クビットを持つジョセフソン回路を実験的に実現する.
  • 固体量子ビット間の相互作用と絡み合いを調査する.

主な方法:

  • 2つの結合された充電量子ビットを持つジョセフソン回路の製造.
  • 量子状態を一貫して混合するためにパルス技術の適用.
  • 量子ビットの相互作用を研究するために,量子振動の観測と分析.

主要な成果:

  • 2つの結合された電荷クビットを持つジョセフソン回路の実証が成功しました.
  • キュービット間の一貫した相互作用を示す量子振動の観測.
  • 複数の固体量子ビットを組み合わせることの実現可能性に関する証拠.

結論:

  • 2つの固体量子ビットの実験的結合は実現可能である.
  • 結果は,絡み合った2量子ビット状態を作成する可能性を示唆しています.
  • この作業は,マルチクビット量子プロセッサの構築に向けた重要な一歩を表しています.