信号传递与区分相同纯量子态的不同叠加
综合物理
2020-06-23 v3 量子物理
摘要
量子态的不同系综可以具有相同的平均非纯态。已知，通过同一非纯量子态的不同混合过程来区分此类构造，必然意味着信号传递。与此同时，纯量子态的不同叠加可以导致相同的纯态。我们表明，通过导致相同纯量子态的不同干涉仪装置来区分此类制备的可能性，同样意味着信号传递。无论区分过程是确定性的还是概率性的，该结论均成立。
引用
@article{arxiv.1904.05720,
title = {Signaling versus distinguishing different superpositions of same pure quantum state},
author = {Chirag Srivastava and Sreetama Das and Aditi Sen De and Ujjwal Sen},
journal= {arXiv preprint arXiv:1904.05720},
year = {2020}
}
备注
v1: 2 pages. Please also look at the paper by A.K. Pati on arXiv today for a different perspective. v2: paper re-written to motivate the results better, previous results unchanged. v3 Journal reference and DOI added