One can manipulate the math a bit with sleep debt. In the case of an afternoon nap, you might have more success if you shave 0.5-1 hour off your nighttime sleep and the make it up in the nap. Supplements too can alter sleep debt by suppressing REM, thus putting the balance of deep and REM off. The trouble is making such an irregular routine sustainable and fit with the rest of your waking life. And it's hardly as easy as pushing a button. But that's my 2 cents.