Electrical and Computer Engineering Seminar

Event Date: 

Monday, May 7, 2012 - 2:00pm

Event Location: 

  • Harold Frank Hall
  • Room 1132

Event Contact: 

Libby Straight



Konstantin K. Likharev, Professor of Physics, Stony Brook University

"Reversible Computing: Possibilities and Challenges"

May 7 (Mon) 2:00pm
Harold Frank Hall, Room 1132 (CS Conference Room)

I will review physics of the so-called "thermodynamic limit" on the energy consumption at computation, and C. Bennett's idea of reversible computing, which allows that limit to be avoided. Unfortunately, even if implemented in hardware virtually free of static power consumption (such as Parametric Quantron circuits), a genuinely reversible computation would require exponentially large resources. Selective reversibility sacrifices may sharply reduce this hardware overhead, but still leave the circuit speed and defect tolerance relatively low. The implementation of reversible computing in CMOS circuits, with their final static power consumption, adds additional challenges. I believe that the future of this concept will depend on the progress of IC patterning and 3D integration.