Klaus Mølmer

Input-Output Theory with Quantum Pulses

2019 · Physical Review Letters

We present a formalism that accounts for the interaction of a local quantum system, such as an atom or a cavity, with traveling pulses of quantized radiation. We assume Markovian coupling of the stationary system …

Perfect splitting of a two-photon pulse

2023 · Physical Review A

We employ a cascaded system approach to numerically simulate the interaction of photon pulses with a two-level scatterer in a chiral waveguide QED setup and show that the scattering of a two-photon pulse may lead …

Parametric amplification of a quantum pulse

2023

We present a theory for the transformation of quantum wave packets by parametric amplifiers. We find that input wave packets couple to only two output modes and can be amplified without significant addition of noise.

Subtraction and Addition of Propagating Photons by Two-Level Emitters

2024 · Physical Review Letters

Coherent manipulation of quantum states of light is key to photonic quantum information processing. In this Letter, we show that a passive two-level nonlinearity suffices to implement non-Gaussian quantum operations on propagating field modes. In …