Charge-based quantum computing using single donors in semiconductors
Charge-based quantum computing using single donors in semiconductors
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DOI：
10.1103/physrevb.69.113301
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发表时间：
2004-03-01
影响因子：
3.7
通讯作者：
Clark, RG
中科院分区：
文献类型：
--
作者：
Hollenberg, LCL;Dzurak, AS;Clark, RG
考虑到半导体原子掺杂的最新进展，使用单原子编码量子比特的固态量子计算机体系结构现在是可行的。在这里，我们提出了一个由半导体晶体中的两个掺杂原子组成的电荷量子比特，其中一个是单电离的。表面电极控制量子比特，射频单电子晶体管提供快速读出。计算得到的单门时间为50ps或更少，比预期的退相干时间短得多。我们提出了通用的一量子比特和二量子比特门操作，并讨论了制造和扩展的前景。
Solid-state quantum computer architectures with qubits encoded using single atoms are now feasible given recent advances in the atomic doping of semiconductors. Here we present a charge qubit consisting of two dopant atoms in a semiconductor crystal, one of which is singly ionized. Surface electrodes control the qubit and a radio-frequency single-electron transistor provides fast readout. The calculated single gate times, of order 50 ps or less, are much shorter than the expected decoherence time. We propose universal one- and two-qubit gate operations for this system and discuss prospects for fabrication and scale up.