from Arizona statute:

D. The landlord shall not abuse the right to access or use it to harass the tenant. Except in case of emergency or if it is impracticable to do so, the landlord shall give the tenant at least two days' notice of the landlord's intent to enter and enter only at reasonable times.
the only part that throw a wrench into the works is the "if it is impracticable". Don;t know how that has, or if it has been ruled on by the courts.

Other than that, I would say that you can demand 2 days notice.