The good US workplaces will give you a few months of severance, but you can still expect to receive an email late Friday night that says "don't come in on Monday". They typically don't want fired/laid-off employees in the office at all (in theory for "security", but mostly to prevent labour organisation)
That's fine - being paid for your time in lieu of notice is practiced even in countries with very strong employee protections. That's still "notice" as far as I'm concerned.