Your beer can only cool so fast. Blame quantum mechanics
New study places a quantum limit on how fast a system can reach a state of thermal equilibrium The post Your beer can only cool so fast. Blame quantum mechanics appeared first on Physics World .
A new study published in Nature Physics reveals that quantum mechanics imposes a limit on how quickly objects can thermalize to a specific temperature. Thermalization refers to the process by which an object reaches a state of thermal equilibrium, where it no longer exchanges net heat with its environment. Although physicists have suspected this fundamental limit, the exact conditions under which thermalization is always guaranteed remain unclear.
To explore this limit, the researchers developed a mathematical concept called a thermalization machine. This machine evolves a quantum system from an initial state to a thermal state at a specific temperature. The study demonstrates that the fastest thermalization time is approximately ℏ/(2 k B T), where ℏ is Planck's constant and k B is Boltzmann's constant.
The findings have implications for computer science tasks such as Gibbs state sampling and Hamiltonian learning, and could provide insights into broader questions in physics.
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