Physicists investigate erasing information at zero energy cost
(PHYSorg.com Physics)

(Phys.org)-A few years ago, physicists showed that it`s possible to erase information without using any energy, in contrast to the assumption at the time that erasing information must require energy. Instead, the scientists showed that the cost of erasure could be paid in terms of an arbitrary physical quantity such as spin angular momentum-suggesting that heat energy is not the only conserved quantity in thermodynamics.