Pump Laser χ(2)

Photonic implementations of quantum teleportation transfer the quantum state of one photon onto another. Recent experimental demonstrations have teleported states encoded into either the polarization or field-quadrature degrees of freedom. An outstanding question is how to simultaneously teleport quantum information encoded in multiple photonic degrees of freedom. The capability to teleport information carried by multiple degrees of freedom could support techniques for manipulating qubits, e.g., embedded Bell-state analysis, or help overcome experimental inefficiencies, e.g., losses due to spectral filtering. We report how the spectral and polarization states of a single photon can be simultaneously teleported by using a Bell-state analyzer based on optical sum-frequency generation. A pair of spectrally entangled photons can be generated by spontaneous parametric down conversion. In SPDC, a nonlinear medium induces a high frequency pump photon to decay into a pair of lower frequency photons. Depending on the type of SPDC, the photons may be similarly (type-I) or oppositely (type-II) polarized. ωp, kp,⊥ ω2, k2,⊥ ω1, k1,