arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0003140quant-ph
收藏

半透明物体之间的“无交互”辨别

"Interaction-free" discrimination between semi-transparent objects

Graeme Mitchison, Serge Massar

备注：
5 pages (latex), 2 figure, minor corrections, version to appear in Phys. Rev. A
发表信息：
Phys. Rev. A 63, 032105 (2001)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

无吸收（也称为“无相互作用”）测量旨在使用测试粒子检测不透明物体的存在，而该粒子不被物体吸收。这里，我们考虑半透明物体，其具有在保持物体状态不变的同时透射粒子的幅度$α$和吸收粒子的幅度$β$。我们的任务是设计一个协议，可以决定两个已知的传输幅度中的哪一个，同时确保没有粒子与物体相互作用。我们表明，能够实现这一点的概率是有限的不平等。这个不等式意味着完全透明和任何部分透明之间的无吸收区分总是可能的，概率接近1，但是两个部分透明只能以小于1的概率区分。

英文摘要：

Absorption-free (also known as ``interaction-free'') measurement aims to detect the presence of an opaque object using a test particle without that particle being absorbed by the object. Here we consider semi-transparent objects which have an amplitude $α$ of transmitting a particle while leaving the state of the object unchanged and an amplitude $β$ of absorbing the particle. The task is to devise a protocol that can decide which of two known transmission amplitudes is present while ensuring that no particle interacts with the object. We show that the probabilities of being able to achieve this are limited by an inequality. This inequality implies that absorption free distinction between complete transparency and any partial transparency is always possible with probabilities approaching 1, but that two partial transparencies can only be distinguished with probabilities less than 1.

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。

↑