TY  - RPRT
TI  - Is there a unique operator for the phase difference of two quantum fields?
AU  - JR Torgerson
AU  - L Mandel
PY  - 1996
DO  - 10.1103/physrevlett.76.3939
UR  - https://pubmed.ncbi.nlm.nih.gov/10061151/
ID  - 10061151
ER  -