 Speaker:  Rafael Porto 
Title: 
Fundamental gravitational limitations to quantum computing 
Abstract: 
Lloyd has recently considered the ultimate limitations the fundamental laws of physics place on Quantum Computers (QC). Based on ordinary
Quantum Mechanics, he concludes in particular that for an 'ultimate laptop' (a computer of one liter of volume and one kilogram of mass)
the maximum number of operations per second is bounded by 10^51.
Here we consider additional limits that are placed by quantum gravity ideas, namely the use of a relational notion of time and fundamental
uncertainty relations that exists on time measurements.
We then particularize fot the case of an ultimate laptop and show that the
maximum number of operations is further constrained to 10^47 per second. In addition it is shown that black holes QC face similar
limitations.

Talk: 
Transparencies, Recorded Talk

 