A rookie in physics from China

sHimprinten
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How did you find PF?
Bing search: In fact, I was searching for the answer to the question "Can a rest frame be chosen for the center of momentum for a system of two photos? " in Bing, and the PF pops out.
:partytime:
 
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Welcome to PF! :smile:
 
I’m a retired ex physicist I guess. Although I have a first degree in theoretical physics and did post graduate studies ( structural phase transitions in strontium Titanate, I did not pursue a career in physics. However it has always been my first love. Since retiring I’ve been interested in quantum computing and quantum mechanics

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