Theoretical challenges to the 2nd Law?
What are some the theoretical challenges to the 2nd Law?
(cf. Čápek, Vladislav, and Daniel P. Sheehan. Challenges to the Second Law of Thermodynamics: Theory and Experiment. Springer, 2005., chapter "Modern Quantum Challenges: Theory.")
Experimental challenges to the 2nd Law?
Is there an experiment that has found violations of the 2nd Law of Thermodynamics? Is there an experiment that shows that entropy decreases for certain systems?