叠加输入态量子点接触的极限电荷灵敏度和效率
Ultimate charge sensitivity and efficiency of a quantum point contact with a superposed input state
摘要：
我们解决了最终的电荷检测方案与量子点接触。结果表明，一个叠加的输入状态是必要的，以充分利用量子点接触探测器的灵敏度。输入状态的相干性提供了电荷灵敏度的改善，并且这种改善是散射矩阵的基本性质的结果。此外，通过控制两个输出波之间的干涉，量子限制（最大效率）检测是可能的。我们的计划提供了一个通用的量子点接触的电荷检测的最终灵敏度和效率。
英文摘要：
We address the ultimate charge detection scheme with a quantum point contact. It is shown that a superposed input state is necessary to exploit the full sensitivity of a quantum point contact detector. The coherence of the input state provides an improvement in charge sensitivity, and this improvement is a result of the fundamental property of the scattering matrix. Further, a quantum-limited (maximally efficient) detection is possible by controlling the interference between the two output waves. Our scheme provides the ultimate sensitivity and efficiency of charge detection with a generic quantum point contact.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
