Is Quantum Statistical Mechanics a Quantum Field Theory?

Schreiberdk
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Hi there PF.

I just want to ask, whether Quantum Statistical Mechanics is a Quantum field theory.

If not, is there anything else that describes entropy and thermodynamics in terms of a Quantum field theory?
 
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It can be formulated that way, sure. See for example "Methods of Quantum Field Theory in Statistical Physics," by Abrikosov et al.
 
Schreiberdk said:
I just want to ask, whether Quantum Statistical Mechanics is a Quantum field theory.
Apart perhaps from some introductory stuff, almost everything done in statistical mechanics is ''quantum field theory'', but not ''a'' quantum field theory. The latter is reserved for denoting a particular theory with a specific Lagrangian density or Hamiltonian density.
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!

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