I guess in addition isn’t the thermal gradient they are claiming is nonexistent just extremely small throughout the graphene molecules? They aren’t gonna be a perfectly uniform temperature and thermals don’t transfer instantly meaning a gradient would be present. I guess couldn’t you prove they aren’t reducing entropy by comparing how quickly the sheet of graphene cools when this system is active vs a regular sheet of graphene in the same conditions. I’d guess we would see their system losing heat more quickly than the plain old sheet of graphene thus showing this isn’t a maxwell demon?