Title: On the Heat Kernel and Weyl Anomaly of Schrödinger invariant theory,
Abstract: We propose a method inspired from discrete light cone quantization (DLCQ) to
determine the heat kernel for a Schrödinger field theory (Galilean boost
invariant with $z=2$ anisotropic scaling symmetry) living in $d+1$ dimensions,
coupled to a curved Newton-Cartan background starting from a heat kernel of a
relativistic conformal field theory ($z=1$) living in $d+2$ dimensions. We use
this method to show the Schrödinger field theory of a complex scalar field
cannot have any Weyl anomalies. To be precise, we show that the Weyl anomaly
$\mathcal{A}^{G}_{d+1}$ for Schrödinger theory is related to the Weyl anomaly
of a free relativistic scalar CFT $\mathcal{A}^{R}_{d+2}$ via
$\mathcal{A}^{G}_{d+1}= 2\pi \delta (m) \mathcal{A}^{R}_{d+2}$ where $m$ is the
charge of the scalar field under particle number symmetry. We provide further
evidence of vanishing anomaly by evaluating Feynman diagrams in all orders of
perturbation theory. We present an explicit calculation of the anomaly using a
regulated Schrödinger operator, without using the null cone reduction
technique. We generalise our method to show that a similar result holds for one
time derivative theories with even $z>2$.