Source-linked AI summary
Thermal memory: a storage of phononic information
Lei Wang, Baowen Li
TL;DR
The paper addresses whether transient behavior in nonequilibrium thermal systems can support memory, a rarely studied question relevant to phononic information storage. It models a bistable thermal circuit and numerically demonstrates long-lived storage with readout that does not destroy the stored state.
Problem
Transient processes in nonequilibrium systems are rarely studied, despite the need for thermal systems to retain and read phononic information.
Method
The paper models a one-dimensional nonlinear lattice with two Frenkel–Kontorova segments, a central particle, NDTR, finite-time temperature analysis, and simulated writer and reader stages.
Results
The model has two stable states, and simulations show that written “on” or “off” data remain stable and are hardly destroyed during readout.
Takeaways & Limitations
A bistable thermal circuit can store thermal information for a long time and self-recover it after perturbation from a thermometer.
Takeaways & Limitations
The estimated data lifetime is roughly 5 * 10^9 dimensionless time units, or about 100 µs for carbon nanostructures, shorter than electronic DRAM lifetimes.
Abstract
from arXiv · showhide
Memory is an indispensable element for computer besides logic gates. In this Letter we report a model of thermal memory. We demonstrate via numerical simulation that thermal (phononic) information stored in the memory can be retained for a long time without being lost and more importantly can be read out without being destroyed. The possibility of experimental realization is also discussed.