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We present measurements of the cross-correlation of the triply-ionized carbon(CIV) forest with quasars using Sloan Digital Sky Survey Data Release 14. Thestudy exploits a large sample of new quasars from the first two years ofobservations by the Extended Baryon Oscillation Spectroscopic Survey (eBOSS).The CIV forest is a weaker tracer of large-scale structure than the Ly$\alpha$forest, but benefits from being accessible at redshifts $z<2$ where the quasarnumber density from eBOSS is high. Our data sample consists of 287,651 CIVforest quasars in the redshift range $1.4<z<3.5$ and 387,315 tracer quasarswith $1.2<z<3.5$. We measure large-scale correlations from CIV absorptionoccuring in three distinct quasar rest-frame wavelength bands of the spectrareferred to as the CIV forest, the SiIV forest and the Ly$\alpha$ forest. Fromthe combined fit to the quasar-CIV cross-correlations for the CIV forest andthe SiIV forest, the CIV redshift-space distortion parameter is $\beta_{\rmCIV}=0.27_{\ -0.14}^{\ +0.16}$ and its combination with the CIV lineartransmission bias parameter is $b_{\rm CIV}(1+\beta_{\rm CIV})=-0.0183_{\-0.0014}^{\ +0.0013}$ ($1\sigma$ statistical error) at the mean redshift$z=2.00$. Splitting the sample at $z=2.2$ to constrain the bias evolution withredshift yields the power-law exponent $\gamma=0.60\pm0.63$, indicating asignificantly weaker redshift-evolution than for the Ly$\alpha$ forest lineartransmission bias. We demonstrate that CIV absorption has the potential to beused as a probe of baryon acoustic oscillations (BAO). While the current dataset is insufficient for a detection of the BAO peak feature, the final quasarsamples for redshifts $1.4<z<2.2$ from eBOSS and the Dark Energy SpectroscopicInstrument (DESI) are expected to provide measurements of the isotropic BAOscale to $\sim7\%$ and $\sim3\%$ precision, respectively, at $z\simeq1.6$.

The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14