New physics associated with the cosmic acceleration can be probed at
cosmological scales as well as in laboratory experiments. I will begin by
discussing the formation of large-scale cosmic structure, whose statistics
will allow us to constrain cosmic expansion and new forces along with the
masses of neutrinos. Using higher-order cosmological perturbation
theories, I compute the power spectrum of large-scale structure, the
Fourier transform of the two-point correlation function, for a universe
with massive neutrinos and a cosmic acceleration driven by a time-varying
dark energy density. Comparison with N-body dark matter simulations shows
that perturbation theory is accurate to a few percent at distances of
interest to upcoming galaxy surveys, and predicts a shift in the Baryon
Acoustic Oscillations. Next, I will discuss laboratory constraints on
couplings between dark energy and Standard Model particles, which are
complementary to cosmological probes. Several models predict fifth forces
at the dark energy scale, of order 100 microns, which are accessible to
the next generation of laboratory experiments. Dark energy may also
couple to photons, allowing for the production of dark energy particles in
the Sun or the laboratory. The combination of information from the
megaparsec and the micron scales will provide comprehensive constraints on
dark energy over the next decade.