Deterministic Photon Sorting in Waveguide QED Systems
- URL: http://arxiv.org/abs/2202.06992v1
- Date: Mon, 14 Feb 2022 19:20:05 GMT
- Title: Deterministic Photon Sorting in Waveguide QED Systems
- Authors: Fan Yang, Mads M. Lund, Thomas Pohl, Peter Lodahl, Klaus M{\o}lmer
- Abstract summary: We show that a pair of two-level emitters, chirally coupled to a waveguide, may scatter single- and two-photon components of an input pulse into temporal modes with a fidelity $gtrsim 0.9997$.
The presented scheme can be employed to construct logic elements for propagating photons, such as a deterministic nonlinear-sign gate with a fidelity $gtrsim 0.9995$.
- Score: 3.4756461334223228
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Sorting quantum fields into different modes according to their Fock-space
quantum numbers is a highly desirable quantum operation. In this Letter, we
show that a pair of two-level emitters, chirally coupled to a waveguide, may
scatter single- and two-photon components of an input pulse into orthogonal
temporal modes with a fidelity $\gtrsim 0.9997$. We develop a general theory to
characterize and optimize this process and observe an interesting dynamics in
the two-photon scattering regime: while the first emitter gives rise to a
complex multimode field, the second emitter recombines the field amplitudes and
the net two-photon scattering induces a self-time reversal of the pulse mode.
The presented scheme can be employed to construct logic elements for
propagating photons, such as a deterministic nonlinear-sign gate with a
fidelity $\gtrsim 0.9995$
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