Direct detection of quantum non-Gaussian light from a dispersively coupled single atom
arXiv:2108.02038 · doi:10.22331/q-2022-02-24-660
Abstract
Many applications in quantum communication, sensing and computation need provably quantum non-Gaussian light. Recently such light, witnessed by a negative Wigner function, has been estimated using homodyne tomography from a single atom dispersively coupled to a high-finesse cavity. This opens an investigation of quantum non-Gaussian light for many experiments with atoms and solid-state emitters. However, at their early stage, an atom or emitter in a cavity system with different channels to the environment and additional noise are insufficient to produce negative Wigner functions. Moreover, homodyne detection is frequently challenging for such experiments. We analyse these issues and prove that such cavities can be used to emit quantum non-Gaussian light employing single-photon detection in the Hanbury Brown and Twiss configuration and quantum non-Gaussianity criteria suitable for this measurement. We investigate in detail cases of considerable cavity leakage when the negativity of the Wigner function disappears completely. Advantageously, quantum non-Gaussian light can be still conclusively proven for a large set of the cavity parameters at the cost of overall measurement time, even if noise is present.
arXiv comment13 pages, 5 figures
References in corpus (31)
- Photonic quantum technologies
- Interfacing single photons and single quantum dots with photonic nanostructures
- Near optimal single photon sources in the solid state
- Continuous-variable optical quantum state tomography
- Cavity-based quantum networks with single atoms and optical photons
- On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
- Scalable photonic quantum computation through cavity-assisted interaction
- Exciton photon strong-coupling regime for a single quantum dot in a microcavity
- Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
- Hybrid quantum information processing
- Encoding a qubit in a trapped-ion mechanical oscillator
- Boson Sampling for Molecular Vibronic Spectra
- Controllable generation of highly nonclassical states from nearly pure squeezed vacua
- Highly indistinguishable and strongly entangled photons from symmetric GaAs quantum dots
- A gated quantum dot far in the strong-coupling regime of cavity-QED at optical frequencies
- Deterministic creation of entangled atom-light Schrödinger-cat states
- Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions
- A high-fidelity photon gun: intensity-squeezed light from a single molecule
- Detecting quantum non-Gaussianity via the Wigner function
- Deterministic Shaping and Reshaping of Single-Photon Temporal Wave Functions
- Pure single photons from a trapped atom source
- Quantum non-Gaussian Depth of Single-Photon States
- Hyper-entanglement of photons emitted by a quantum dot
- Faithful hierarchy of genuine -photon quantum non-Gaussian light
- Cavity-Enhanced Atom-Photon Entanglement with Subsecond Lifetime
- Fundamental Limit on the Efficiency of Single-Photon Generation Based on Cavity Quantum Electrodynamics
- Single-Photon Distillation via a Photonic Parity Measurement Using Cavity QED
- Entangled photon pairs from quantum dots embedded in a self-aligned cavity
- Sufficiency of quantum non-Gaussianity for discrete-variable quantum key distribution over noisy channel
- Quantum non-Gaussianity from a large ensemble of single photon emitters
- Detecting quantum non-Gaussianity of noisy Schrödinger cat states