Communication and Disclosure

Improving energy efficiency in ICT? Limit is the sky

M. Lopez-Suarez, I. Neri, L. Gammaitoni                                   - Photo by E. Mariani


Perugia, Aug. 15th - 2016

Research recently published on Nature Communications shows that traditional logic gates, used in present computers, could be operated without minimum energy dissipation.

Reducing energy consumption in Information and Communication Technology (ICT) devices has nowadays become a strategic task to further improve performances and diffusion of such technology. Both the future of supercomputing and the dawn of the Internet-of-Things scenario are at risk if the power consumption problem is not solved: too much electric energy is required by ICT devices. On the other hand: aren’t we tired enough of continuously recharging the battery of mobile phones?

To complicate things, the continuous improvement in the efficiency (number of operation per Watt) of computing devices over the years has finally brought the technology close to what was supposed to be a fundamental limit of physics: the so-called Landauer’s limit.

An experiment at NiPS Lab, in Perugia (Italy) shows that a traditional logic gate could, in principle, be operated below the Landauer’s limit and thus the supposed minimum energy expenditure for operating traditional logic gates, does not exist. A good news for those interested in further improving energy efficiency in ICT.

The results of this experiment made by the scientists of NiPS Laboratory, led by Prof. Luca Gammaitoni, at the University of Perugia, published on Nature Communications on 28th June 2016, will be presented in the next few weeks at two international conferences: the ICT-Energy Science conference in Aalborg (DK) on Aug. 17th by Miquel Lopez-Suarez and the ICAND 2016 conference in Denver (CO) on Aug. 29 by L. Gammaitoni. 


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Stochastic Resonance review paper hits 5,000 citations on Google Scholar


The phenomenon of Stochastic Resonance, proposed for the first time in 1981 (R. Benzi, S, Sutera, A. Vulpiani, J. Phys. A 14, L453, 1981; C. Nicolis, G. Nicolis, Tellus 33, 225, 1981) has attracted continuous attention in the last 30 years. Most of its fortune among scientists and the public at large is due to its counter-intuitive characteristic: given a non-linear dynamic system, the degree of order in its behavior can be increased simply by injecting more noise, i.e. increasing the disorder. Clearly what triggered researchers’ curiosity the most was the suggestion that noise, often considered a nuisance of small influence, can play instead a very significant role with potential applications to biological systems and technological devices.
In 1998 an international team of scientists wrote the most comprehensive and, to date, the most appreciated review article to describe this phenomenon:
Title: Stochastic resonance
Journal: REVIEWS OF MODERN PHYSICS Volume: 70 Issue: 1 Pages: 223-287 Published: 1998
Since then the review article has grown to become a highly cited paper that has recently reached 5,000 citations on Google Scholar (3,745 on ISI).
Statistics available at:

Fernando Gonzales Zalba, from Hitachi Cambridge visits NiPS



Perugia, May 11-13, 2016
Dr. Fernando Gonzalez-Zalba Senior Research Scientist Hitachi Cambridge Laboratory, Cambridge, visited NiPS Laboratory for planning future collaborations.
On Wednesday May 11, at 15:00, Dr. Gonzalez-Zalba presented a public seminar on 
Towards quantum computing using silicon-on-insulator transistor technology
Silicon complementary metal oxide semiconductor (CMOS) technology has driven the
success of the semiconductor industry in the last few decades. The classical computational
power has increased exponentially but this progress is bound to reach its fundamental limits
in the next years. We are now starting to see that CMOS technology itself can offer an
alternative to overcome its classical fundamental limits, not in
ation. A quantum computer promises to be exponentially more efficient than classical
computers in solving a specific set of problems, such as database searches and prime
number factorization.

Vivere e sopravvivere nell'entropia



Perugia, April 20, 2016


L. Gammaitoni speaks at the conference "Vivere e sopravvivere nell'entropia" with a talk on "Energia ed Entropia: la strana coppia".

During the event the book "Sporco Mondo" by Franco Vennati will be presented and discussed.


Organization by:

Associazione culturale "Luigi Bonazzi" e Università di Perugia

Comune di Perugia - Infn

Forti, "Promuovere i talenti, far crescere l’eccellenza"

Al chiostro di San Mercuriale la mostra "Maria Sklodowska Curie. Ovunque la prima" Eventi a Forlì


Giovedì 28 Aprile, alle ore 18.30, al Circolo La Scranna di corso Garibaldi n.80 si terrà il convegno “Promuovere i talenti, far crescere l’eccellenza” con la partecipazione di Luca Gammaitoni, Direttore NIPS Laboratory, dipartimento di Fisica dell’Università degli studi di Perugia e Sara Bravaccini, ricercatrice oncologica. Introdurrà Pier Luigi Consorti. Parteciperà l’Assessore comunale di Forlì Raoul Mosconi.

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international ONRG project workshop

Perugia, 12 April 2016


Novel techniques for the realization of energy harvesting systems

capable of substituting/integrating existing batteries

for the powering of autonomous electronic devices.


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"CLICK 4 ENERGY" Photo contest

Perugia, March 23rd


NiPS Laboratory, together with Giovanna Griffo - MaxArtis organizes the "CLICK 4 ENERGY" photo contest.
Participation is open to all the interested photo artists (> 18 years old).
Please connect to "" to know more.

This initiative is part of the dissemination activities of the ICT-Energy Coordination Action (FET Proactive - Project number 611004).


Luca Gammaitoni meets with Gouhei Tanaka at the Institute of Industrial Science, University of Tokyo



Tokyo, February 26th, 2016

Luca Gammaitoni meets with Gouhei Tanaka at the Institute of Industrial Science, University of Tokyo for discussing the research on bio inspired computation. Prof. Tanaka is conducting research in collaboration with IBM Japan to explore energy efficiency in bio inspired computation: a novel computing paradigm that exploits neural networks in order to apply biological principles.


Helios Vocca from NiPS speaks at the KAGRA Face-2-face meeting

Kashiwa, Feb 22 - 2016



Helios Vocca, the group leader of Virgo-Perugia, presented a talk on the Virgo Suspensions at the KAGRA Face-2-Face meeting, in Kashiwa (JP).

KAGRA is the Japanese funded project that aims at building a new, enhanced, gravitational wave underground detector.

The VIRGO Perugia group is part of the Noise in Physical Systems (NiPS) Laboratory – at the Physics Department of the University of Perugia, Italy.

To know more about the Virgo Perugia activity, please check the web site.

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