一个可编程的二量子比特量子处理器
T F Watson1, S G J Philips1, E Kawakami1
1QuTech and the Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
Nature
|February 15, 2018
概括
研究人员使用量子点自旋量子位开发出可扩展的量子处理器. 这种进步克服了关键的挑战,为更大,更耐故障的量子计算机铺平了道路.
科学领域:
- 量子计算
- 固态物理
背景情况:
- 现在可以实现单个量子位 (qubits) 的高保真度.
- 扩大量子位数以实现容错的量子计算带来了重大挑战.
研究的目的:
- 使用基于量子点的自旋量子位演示可编程的两量子位量子处理器.
- 克服量子位交叉通话,状态泄露,校准和控制硬件方面的挑战.
主要方法:
- 使用基于量子点的自旋量子位来实现潜在的高密度集成和纯电动操作.
- 使用精心设计的控制技术来管理量子位相互作用和错误.
- 进行量子状态断层扫描以描述纠和测量状态忠实性.
主要成果:
- 在设备中成功展示了一个可编程的二量子比特处理器.
- 执行了正规的量子算法:Deutsch-Josza和Grover搜索.
- 达到了85-89%的州忠诚度和73%-82%的贝尔州一致性.
结论:
- 开发的量子处理器克服了扩展量子计算的关键挑战.
- 中的量子点旋转量子比特显示出构建更大规模,更耐故障的量子计算机的潜力.
相关概念视频
02:43Quantum Numbers
52.4K
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.
52.4K
02:45The Quantum-Mechanical Model of an Atom
59.8K
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.
59.8K
01:192D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
1.5K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
1.5K
03:07Electron Affinity
43.8K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
43.8K
03:06The Pauli Exclusion Principle
59.6K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
59.6K
04:00Periodic Classification of the Elements
60.5K
The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
60.5K