Some claim that quantum answers the question of how energy came to exist in its organized or low entropy order throughout the universe. The phenomenon of entanglement specifically is cited. However, energy used to create the entangled particles must be included in the equation because the breakdown of entanglement is the reverse of the original entanglement. Entangling the particles stores potential energy in the particles. Hence, the second law of thermodynamics remains intact.
Landauer’s erasure therefore acquires a new dimension when entanglement is allowed, but even then it still remains fully compliant with the second law. For better or for worse, the entropy of the whole universe still cannot be decreased even with the full assistance of the quantum magic of entanglement and negative entropies of quantum objects.
—Vlatko Vedral, June 1, 2011, Does Quantum Mechanics Flout the Laws of Thermodynamics? http://blogs.scientificamerican.com/guest-blog/2011/06/01/does-quantum-mechanics-flout-the-laws-of-thermodynamics/
