Quantised Thermal Conductance

In 1983 J Pendry published a paper on the quantum limits to the flow of information and entropy [Pendry'83]. In it he showed that there is an inequality that limits the flow of information as a function of the energy flow. He applied this relationship to calculate the limit on the rate of heat flow in a channel and found that this had to be 1 2 2 3 1 − ≤ h T kB π where kB is Boltzmann constant and ħ is Plank’s constant over 2π and T is the temperature of the channel. B