Second law of thermodynamics can be apparently violated insystems whose dynamics depend on information acquired bymeasurement. However, when one considers measurementand erasure together with the system, it saves the second law.We consider the simple example of an information machine,where information is used as a resource to increase the machine’s performance. The system is connected to two baths, awork source, and a moving tape which is used as an informationreservoir. The performance of the device is autonomous.The system acts as an engine, erasure or refrigerator. Evencombination of any two is possible. All these possibilities areallowed by the generalized second law.
Volume 27 | Issue 8