Scanning quantum decoherence microscopy
Scanning quantum decoherence microscopy
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DOI：
10.1088/0957-4484/20/49/495401
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发表时间：
2009-12-09
期刊：
影响因子：
3.5
通讯作者：
Hollenberg, Lloyd C. L.
中科院分区：
文献类型：
--
作者：
Cole, Jared H.;Hollenberg, Lloyd C. L.
使用量子比特作为灵敏的纳米级磁力计已经在理论上进行了研究，最近在实验上得到了证实。在本文中，我们提出了一个新的概念，其中扫描两个状态的量子系统被用来探测通过退相干的微妙影响的样品。同时映射量子比特的哈密顿和退相干性质提供了纳米级磁场（或电场）性质的独特图像。所得到的图像对样品产生的场的时间和空间变化敏感。作为例子，我们从理论上研究两个应用;一个从凝聚态物理学，其他生物物理学。实现该设备最简单版本所需的各个组件（量子位的表征和测量，纳米级定位）已经通过实验证明。
The use of qubits as sensitive nanoscale magnetometers has been studied theoretically and recently demonstrated experimentally. In this paper we propose a new concept, in which a scanning two-state quantum system is used to probe a sample through the subtle effects of decoherence. Mapping both the Hamiltonian and decoherence properties of a qubit simultaneously provides a unique image of the magnetic (or electric) field properties at the nanoscale. The resulting images are sensitive to the temporal as well as spatial variation in the fields created by the sample. As examples we theoretically study two applications; one from condensed matter physics, the other biophysics. The individual components required to realize the simplest version of this device (characterization and measurement of qubits, nanoscale positioning) have already been demonstrated experimentally.