Deterministic generation of a photon fock state on demand from a solid-state system

Keyu Xia, Jason Twamley, Gavin K. Brennen +1 more

Keyu Xia, Gavin K. Brennen, Demosthenes Ellinas +1 more

Using an optical toroidal cavity coupled to a Nitregon-vacancy center in a nanodiamond, we present a method to deterministically and on-demand generate photon Fock states with high photon occupation in the visible light frequency.

Keyu Xia, Gavin K. Brennen, Demosthenes Ellinas +1 more

We theoretically study the deterministic generation of photon Fock states on-demand using a protocol based on a Jaynes Cummings quantum random walk which includes damping. We then show how each of the steps of this protocol can be implemented in a low temperature solid-state quantum system with a Nitrogen-Vacancy centre in a nanodiamond coupled to a nearby high-Q optical cavity. By controlling the coupling duration between the NV and the cavity via the application of a time dependent Stark shift, and by increasing the decay rate of the NV via stimulated emission depletion (STED) a Fock state with high photon number can be generated on-demand. Our setup can be integrated on a chip and can be accurately controlled.

Peter Lodahl

Herbert, Walther

Jake Iles-Smith, Mark Kamper Svendsen, Ángel Rubio +2 more

We propose a mechanism for generating single photons in the mid-infrared (MIR) using a solid-state or molecular quantum emitter. The scheme uses cavity quantum electrodynamics (QED) effects to selectively enhance a Frank-Condon transition, deterministically preparing a single Fock state of a polar phonon mode. By coupling the phonon mode to an antenna, the resulting excitation is then radiated to the far field as a single photon with a frequency matching the phonon mode. By combining macroscopic QED calculations with methods from open quantum system theory, we show that optimal parameters to generate these MIR photons occur for modest light-matter coupling strengths, which are achievable with state-of-the-art technologies. Combined, the cascaded system we propose provides a quasi-deterministic source of heralded single photons in a regime of the electromagnetic spectrum where this previously was not possible.