Finite-temperature Field Theory - Theoretical Physics (TIFR)
Finite-temperature Field Theory - Theoretical Physics (TIFR)
Finite-temperature Field Theory - Theoretical Physics (TIFR)
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Basics of Statistical <strong>Physics</strong> and Thermodynamics<br />
Scalar fields at finite <strong>temperature</strong><br />
Interacting scalar fields<br />
Feynman rules at finite <strong>temperature</strong><br />
Thermodynamics of ϕ 4 theory<br />
◮ Conclusion: In evaluating Z , end up computing expectation<br />
values of powers of S I within unperturbed theory<br />
〈S k I 〉 0 =<br />
∫<br />
Dϕ e<br />
−S 0<br />
S k I<br />
∫<br />
Dϕ e −S 0<br />
◮ No external legs: Partition function available through the<br />
computation of vacuum diagrams<br />
◮ As usual, powers of λ count loop order<br />
◮ Challenge: Derive Feynman rules at finite <strong>temperature</strong><br />
logo<br />
Aleksi Vuorinen, CERN<br />
<strong>Finite</strong>-<strong>temperature</strong> <strong>Field</strong> <strong>Theory</strong>
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