Yes, I am a quantum mechanic! Those darn quantum computers break all the time.

Indeed, as the above calculation indicates, to take full advantage of the memory space available, the ultimate laptop must turn all its matter into energy.

Thinking of the universe as a computer is controversial.

The primary consequence of the computational nature of the universe is that the universe naturally generates complex systems, such as life. Although the basic laws of physics are comparatively simple in form, they give rise, because they are computationally universal, to systems of enormous complexity.

I would suggest, merely as a metaphor here, but also as the basis for a scientific program to investigate the computational capacity of the universe, that this is also a reasonable explanation for why the universe is complex.

All physical systems can be thought of as registering and processing information, and how one wishes to define computation will determine your view of what computation consists of.

There are considerable advantages to using many degrees of freedom to store information, stability and controllability being perhaps the most important.