微波光子を用いた決定的量子状態移転と遠隔絡み
P Kurpiers1, P Magnard2, T Walter2
1Department of Physics, ETH Zürich, Zürich, Switzerland. philipp.kurpiers@phys.ethz.ch.
Nature
|June 15, 2018
まとめ
超伝導量子ビットの 決定的な量子ネットワークプロトコルを示します この方法は,分散量子コンピューティングに不可欠な高信頼性状態の転送とエンタグリングを可能にします.
科学分野:
- 量子情報科学
- 量子ネットワーク
- 超伝導量子回路
背景:
- 分散型量子情報処理には 一貫した情報共有が不可欠です
- 直接的な量子チャネルは,決定的エンタグリングを可能にすることで,容認性量子計算の利点を提供します.
- 超伝導回路は 複雑な量子操作を行う 普遍的な量子ノードとして機能します
研究 の 目的:
- 超伝導量子ビットの間の 決定的な状態転送と 絡み合いのプロトコルを実行する
- 量子チャネルを確立し 絡み合いの速度を向上させ 分散量子計算を行う.
- 超伝導回路の潜在能力を 示すために 強力な量子ネットワークを構築する
主な方法:
- マイクロウェーブ・キャビティ・アシスト・ラーマン・プロセスを使った
- 超伝導量子ビット (トランスモンのタイプの人工原子) と移動する単一の光子.
- 受信ノードで光子の吸収によって状態の移転が達成される.
主要な成果:
- 180ナノ秒で98.1%の確率と 80.02%の精度で決定的な量子ビットの状態移転を証明した.
- 50キロヘルツの速度で78.9%の精度でオンデマンドリモートエンタグリングを達成しました.
- 結果は,マスター方程式シミュレーションと優れた一致を示しました.
結論:
- 実施された決定的プロトコルは,分散型量子コンピューティングシステムの構築に向けた重要なステップです.
- この方法は,量子ネットワークで信頼できる情報共有のための実行可能なアプローチを提供します.
- 高精度と絡み合いの速度は 将来の量子ネットワークの応用に 期待されます
関連する概念動画
02:43Quantum Numbers
51.9K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
51.9K
02:45The Quantum-Mechanical Model of an Atom
59.2K
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 hydrogen spectra.
59.2K
02:36Transfer RNA Synthesis
13.4K
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
13.4K
01:19Mechanism of heat transfer
2.0K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
2.0K
01:14Mechanisms of Heat Transfer I
6.2K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
6.2K
01:20Mechanisms of Heat Transfer II
4.5K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.5K