Log In   |   Sign up

New User Registration

Article / Abstract Submission
Register here
Register
Press Release Submission
Register here
Register
coolingZONE Supplier
Register here
Register

Existing User


            Forgot your password
John O | February 2019

Scientists theorize that clever timing for computers can reduce heat below Landauer limit


By Josh Perry, Editor
jperry@coolingzone.com

 

In the 1960s, Rolf Landauer described a theoretical lower limit for the amount of energy required to erase one bit of information (from the 1 state to the 0 state), but University of Twente scientist Jan Klaers has proposed that synchronizing computer operation and temperature to reduce the energy below the limit that Landauer devised.

 


A new theory proposes a method for cooling computers below Landauer’s limit.
(Wikimedia Commons)

 

According to a report from the university, “Looking at the many logical operations that take place in a computer, the temperature profile is complex. If one bit changes state at a certain logical gate, the temperature change will be ‘felt’ in the surrounding gates as well. Although complex, the temperature and energy consumption have the same rhythm as the clock of the microprocessor.”

 

Klaers theorized that it would be possible to synchronize logical operations for the squeezed thermal states where temperature and energy costs are both lower, which would reduce energy consumption below Landauer’s limit.

 

“For this, Klaers analyzed a minimalist mechanical model resembling the one Landauer used for his theory, representing a one-bit memory,” the article continued. “These are the fundamental basics: further research will have to show what results can be achieved in actual computer systems.”

 

The research was recently published in Physical Review Letters. The abstract said:

 

“Landauer’s erasure principle states that the irreversible erasure of a one-bit memory, embedded in a thermal environment, is accompanied with a work input of at least kBTln2. Fundamental to that principle is the assumption that the physical states representing the two possible logical states are close to thermal equilibrium.

 

“Here, we propose and theoretically analyze a minimalist mechanical model of a one-bit memory operating with squeezed thermal states. It is shown that the Landauer energy bound is exponentially lowered with increasing squeezing factor.

 

“Squeezed thermal states, which may naturally arise in digital electronic circuits operating in a pulse-driven fashion, thus can be exploited to reduce the fundamental energy costs of an erasure operation.”

Choose category and click GO to search for thermal solutions

 
 

Subscribe to Qpedia

a subscription to qpedia monthly thermal magazine from the media partner advanced thermal solutions, inc. (ats)  will give you the most comprehensive and up-to-date source of information about the thermal management of electronics

subscribe

Submit Article

if you have a technical article, and would like it to be published on coolingzone
please send your article in word format to articles@coolingzone.com or upload it here

Subscribe to coolingZONE

Submit Press Release

if you have a press release and would like it to be published on coolingzone please upload your pr  here

Member Login

Supplier's Directory

Search coolingZONE's Supplier Directory
GO
become a coolingzone supplier

list your company in the coolingzone supplier directory

suppliers log in

Media Partner, Qpedia

qpedia_158_120






Heat Transfer Calculators