I'm reading David B Kopel's book; Aiming For Liberty. One of the ideas he explores is the role quantum physics plays in discovering truth.
The author goes into detail on Heisenberg's uncertainty principle. That principle, the core, is that measurement of an electron for example will change it's state. the reality cannot seperate from the observation. But recent work by Andrew Jordan of the University of Rochester and Alexander Korotkov UofC Riverside have developed a 'weak" measurement that only part way collapses the quantum state. What does this mean? Well, you can be the observer without influencing the outcome. Heisenberg's theory of physics is that truth is not, but power is summates the theory in regards to how it is applied to postmodern moral philosophy.
Postmodernism is the idea that you distrust theories and ideologies and put your faith in conventions. That there is no absolute truth, whether it be a scientific truth or a literary truth. It is whatever it happens to be at that moment in time. The 'weak' measurement used by Korotkov and Jordan undoes the measurement's effect, returning the electron to its orginal state, i.e. leaving it in its true form.
If what Jordan and Korotkov have discovered is true, then the idea that the right to self defense from tyranny is a universal truth. And that is how quantum physics relates to the second amendment.