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Information-to-work conversion by Maxwell's demon in a superconducting circuit quantum electrodynamical system
Y Masuyama1, K Funo2, Y Murashita3
1Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
Nature Communications
|March 31, 2018
Summary
Researchers experimentally realized a Maxwell
Area of Science:
- Quantum physics
- Information thermodynamics
- Statistical mechanics
Background:
- Information thermodynamics connects information theory and statistical physics.
- Maxwell's demon is a theoretical concept using information to reduce entropy.
- Quantum systems offer a platform for exploring these principles.
Purpose of the Study:
- To experimentally realize a Maxwell's demon.
- To investigate information thermodynamics in a quantum system.
- To verify fluctuation theorems and evaluate energy conversion efficiency.
Main Methods:
- Implemented a Maxwell's demon on a superconducting quantum circuit.
- Utilized quantum non-demolition projective measurement and feedback control.
- Performed experiments on a single qubit.
Main Results:
- Successfully demonstrated a Maxwell's demon in a quantum circuit.
- Verified the generalized integral fluctuation theorem.
- Quantified the conversion efficiency from information gain to work.
Conclusions:
- This experiment provides a physical realization of Maxwell's demon.
- It advances the experimental study of quantum information thermodynamics.
- It opens avenues for exploring quantum machines and feedback control.
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