We show that frequent nondemolition measurements of a quantum system immersed in a thermal bath allow the extraction of work in a closed cycle from the system-bath interaction (correlation) energy, a hitherto unexploited work resource. It allows for work even if no information is gathered or the bath is at zero temperature, provided the cycle is within the bath memory time. The predicted work resource may be the basis of quantum engines embedded in a bath with long memory time, such as the electromagnetic bath of a high-Q cavity coupled to two-level systems.
|Number of pages||9|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 16 Aug 2013|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics