TY  - RPRT
TI  - Time operators and time crystals: self-adjointness by topology change
AU  - Nakatsugawa, Keiji
AU  - Fujii, T.
AU  - Saxena, Avadh
AU  - Tanda, Satoshi
PY  - 2019
DO  - 10.1088/1751-8121/ab3f46
UR  - https://www.osti.gov/biblio/1699452
ID  - 1699452
ER  -