02.12.2021NANO COLLOQUIA S3 Avinash Vikatakavi
Date and Time: December 2, 2021 - 15.00 ONLINE
25.11.2021Producing electricity from heat losses: engineered in Pisa the first device capable of achieving it in a controlled manner
It is now possible to create a new generation of “smart” thermoelectric systems to generate clea...
23.11.2021il progetto RIMMEL @ MECSPE - Bologna 2021
Si svolgerà martedì 23 novembre, dalle 16.45 alle 17.45 (Sala Concerto c/o Centro Servizi – Bolo...
19.11.2021Graphene as a solid lubricant becomes super-slippery
Cnr Nano researchers in collaboration with Sussex University and Rice University studied the frictio...
17.11.2021International Workshop on Advanced Materials-to-Device Solutions for Synaptic Electronics
CNR Nano and ICN2 organized the
03.11.2021The RIMMEL Project @ l'Europa è qui 2021 – VOTE THE VIDEO ONLINE
The RIMMEL project enters the “Europe is here ...
11.10.2021Quantum computers become an experimental physics laboratory
A quantum computer is a machine designed to do calculations. Now a group of physicists from CnrNano,...
05.10.20212021 Nobel Prize for the discoveries on TRPV1 and PIEZO receptors
The seminal discoveries by this year’s Nobel Laureates have explained how heat, cold and touch can...
home » utilities » calendar
28
29
30
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
31
Date and Time: Thursday October 15, 2020 - 11:00 Speaker: Michele Campisi - NEST, NANO-CNR Title: Thermodynamics of a quantum annealer Abstract: The D-wave processor is a partially controllable open quantum system that exchanges energy with its surrounding environment (in the form of heat) and with the external time dependent control fields (in the form of work). Despite being rarely thought as such, it is a thermodynamic machine. Here we investigate the properties of the D-Wave quantum annealers from a thermodynamical perspective. We performed a number of reverse-annealing experiments on the D-Wave 2000Q via the open access cloud server Leap, with the aim of understanding what type of thermal operation the machine performs, and quantifying the degree of dissipation that accompanies it, as well as the amount of heat and work that it exchanges. The latter is a challenging task in view of the fact that one can experimentally access only the overall energy change occurring in the processor, (which is the sum of heat and work it receives). However, recent results of non-equilibrium thermodynamics (namely, the fluctuation theorem and the thermodynamic uncertainty relations), allow to calculate lower bounds on the average entropy production (which quantifies the degree of dissipation) as well as the average heat and work exchanges. The analysis of the collected experimental data shows that (1) in a reverse annealing process the D-Wave processor works as a thermal accelerator and (2) its evolution involves an increasing amount of dissipation with increasing transverse field. Ref.: Quantum Sci. Technol. 5 035013 (2020) https://doi.org/10.1088/2058-9565/ab9755 Venue: in streaming Streaming at: meet.google.com/daz-tqpv-nwr Once connected, please switch off your microphone and camera. If you have questions (only at the end of the presentation) please use the chat to ask for attention. For information, please contact: Fabio Taddei (9038) - fabio.taddei@nano.cnr.it Stefan Heun (9472) - stefan.heun@nano.cnr.it