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Physics  2014 

Quantum quenches and competing orders: I. Time-dependent Hartree-Fock+BCS theory

DOI: 10.1103/PhysRevB.90.024506

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Abstract:

We study the non-equlibrium dynamics of an electronic model of competing bond density wave order and $d$-wave superconductivity. In a time-dependent Hartree-Fock+BCS approximation, the dynamics reduces to the equations of motion of operators realizing the generators of SU(4) at each pair of momenta, $(\boldsymbol{k}, -\boldsymbol{k})$, in the Brillouin zone. We compare the results of numerical studies of our model with recent picosecond optical experiments.

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