主题：从狭义相对论公式看当物体超光速的时候，是否是会时光倒流？ -- 思想的行者

1.

first of all, "量子纠缠与EPR佯谬" is still bothering humanity, obviously, it had bothered Einstein until his death, etc.

those are still of 微观系统 物理现象, even "global", in terms of "幺正操作", etc.

2.

罗化生：从狭义相对论公式看当物体超光速的时候，是否是会时光倒流？

in terms of macroscopic physics, that type of 时光倒流questions are meaningless, there is no 宏观物体超光速, period.

of course, you could say you mean "微观"物体超光速, but what is a "微观"物体? blabla

3.

in QM/QFT, often 微观系统 is "絕熱":therefore system is 么正, 绝热过程可逆 etc, and we have 么正算子（unitary operator), such as "量子计算与量子逻辑门 操作上为所有可能的幺正变换，因而，对态的操作应是幺正的、 可逆的，无能量的", no media (we are trying to find that workable media, obviously) involved, "超光速", etc.

and further into QFT, we have "虛光子", "off shell", many seemingly "超光速" stuff, many in the sense of 相位 field etc, which itself is still a work progress in QFT;

the concept of 相位, 么正算子（unitary operator）in qm originally started with Dirac'work.

and obviously, "物体" in QM is not "物体" as we know in terms of macroscopic physics;

4.

it is very hard to find a real physics system of "絕熱" in the macroscopic environment, and physics as an "emerging physics", "物体" is well behaved according to 狭义相对论, & largely GR as well, when "物体" emerged into macroscopic environment from microscopic environment, where "物体"超光速, "时光倒流" do "happen", but more of "mathematical physics" (for lack of better word description, we need to get into QFT for more "accurate" descriptions , etc).

it's often difficult for people to tell the difference between the macroscopic physics and microscopic physics, with many same or similar terminologies used in both field but often with totally different meanings.

and out of a particular context, even general verbal discussion of general concepts and models is difficult, if not meaningless.

yes, this is a public forum.

5.

because of non-"絕熱" properties of macroscopic environment, "量子计算与量子逻辑门 操作上为所有可能的幺正变换，因而，对态的操作应是幺正的、 可逆的，无能量的"

is still a largely a research-in-progress thing, no one knows whether it is ever possible as a real "app".

and obviously, because of non-"絕熱" properties of macroscopic environment, china is facing a struggle in terms of its "normalization" with global "heatbath", 顏色革命 etc, which is obviously a very important parameter of china modeling, for chairman X & his team, as we know.

by the way, no offense to you or anybody, just trying to clarify some basic concepts/terminologies.

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量子力学相位因子 - 物理

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由 李华钟 著作 - 2001 - 被引用 10 次 - 相關文章

量子力学相位因子3. 李华钟. 中山大学高等学术研究中心及物理系广州. / 量子化对称和相位因子) ) ). 世纪物理学的主旋律0. ) ) ) 引自杨振宁在中国科学院成立.