一个穿着的单元-三元量子比特在中
K Tsoukalas1, U von Lüpke1, A Orekhov1
1IBM Research Europe - Zurich, Rüschlikon, Switzerland.
Nature communications
|January 20, 2026
概括
我们开发了一个用于量子计算的单元三元 (ST) 量子比特. 这种量子比特在低磁场下实现了高保真性和延长连贯时间,克服了其他量子比特类型的局限性.
科学领域:
- 量子计算是一种量子计算.
- 半导体物理 半导体物理
- 这就是Spintronics.
背景情况:
- 半导体孔自旋量子比特在低磁场下提供较长的连贯时间,但受到缓慢的网关速度的影响.
- 单元三元 (ST) 量子比特通过交换相互作用 (J) 保持高门速度,但对大J的充电噪声敏感.
- 在低磁场和低交换相互作用下运行ST量子位对平衡连贯性和控制提出了挑战.
研究的目的:
- 为了证明在低磁场和低交换相互作用下运行的中高度连贯的ST洞旋转量子位.
- 为了实现高保真度量子门操作并延长量子比特连贯时间.
- 探索半导体量子比特中强大的量子控制方法.
主要方法:
- 一个ST孔自旋量子位的制造和特征.
- 交换相互作用 (J) 的调制用于ST量子位的共振驱动.
- 实现频率调制用于通用量子控制.
- 通过连续共振驱动实现一个穿着的ST量子位.
主要成果:
- 在低磁场和低交换相互作用下实现了99.68%的平均门忠度和1.9μs的连贯时间 (T*2).
- 证明了连贯时间 (T*2ρ) 增加了十倍,为穿着ST量子位的20.3μs.
- 使用频率调制实现了99.63%的平均门效率,用于通用控制.
结论:
- ST量子比特可以同时实现高连贯时间和高保真性控制,即使在低磁场和交换相互作用下也是如此.
- 响应驱动和装饰技术显著提高量子比特的一致性.
- 展示的控制方法为高效的基于半导体的量子处理器铺平了道路.
更多相关视频
09:45Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
Published on: July 26, 2016
12.8K
06:57Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
Published on: July 17, 2020
2.6K
相关概念视频
02:31Homologous Recombination
62.8K
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
62.8K
03:25The Periodic Table
109.0K
As early chemists discovered more elements, they realized that various elements could be grouped by their similar chemical behaviors. One such grouping includes lithium (Li), sodium (Na), and potassium (K). All of these elements are shiny, conduct heat and electricity well, and have similar chemical properties. A second grouping includes calcium (Ca), strontium (Sr), and barium (Ba), which also are shiny, good conductors of heat and electricity, and have chemical properties in common. However,...
109.0K
02:11Proteins: From Genes to Degradation
14.2K
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA...
Transcription is the synthesis of RNA...
14.2K
03:06From DNA to Protein
22.2K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
22.2K
03:20The Stanford Prison Experiment
24.6K
The famous and controversial Stanford Prison Experiment, conducted by social psychologist Philip Zimbardo and his colleagues at Stanford University, demonstrated the power of social roles, social norms, and scripts.
24.6K