Broadband pseudothermal states with tunable spectral coherence generated via nonlinear optics
arXiv:1810.02783 · doi:10.1103/PhysRevA.99.013830
Abstract
It is well known that the reduced state of a two-mode squeezed vacuum state is a thermal state---i.e. a state whose photon-number statistics obey a geometric distribution. More exotic \emph{broadband} states can be realized as the reduced state of two spectrally-entangled beams generated using nonlinear optics. We show that these broadband "pseudothermal" states are tensor products of states in spectral Schmidt modes, whose photon-number statistics obey a geometric distribution. We study the spectral and temporal coherence properties of these states and show that their spectral coherence can be tuned---from perfect coherence to complete incoherence---by adjusting the pump spectral width. In the limit of a cw pump, these states are tensor products of true thermal states, but with different temperatures at each frequency. This could be an interesting state of light for investigating the interplay between spectral, temporal, and photon-number coherences.
arXiv comment6 pages main text, 1 full-page figure (12 pages total including reference and appendices )
References in corpus (37)
- Correlated imaging, quantum and classical
- Two-photon "ghost" imaging with thermal light
- Correlated two-photon imaging with true thermal light
- Probing multimode squeezing with correlation functions
- Experimental nonclassicality of single-photon-added thermal light states
- A bright, pulsed two-mode squeezer
- Does coherence enhance transport in photosynthesis?
- Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings
- Engineered optical nonlinearity for a quantum light source
- Continuous-Variable Quantum Key Distribution using Thermal States
- Arbitrary-order lensless ghost imaging with thermal light
- Molecular Response in One-Photon Absorption via Natural Thermal Light vs Pulsed Laser Excitation
- Truly unentangled photon pairs without spectral filtering
- Multiphoton Effects Enhanced Due to Ultrafast Photon-Number Fluctuations
- Joint Temporal Density Measurements for Two-Photon State Characterization
- Exciton Dynamics in Photosynthetic Complexes: Excitation by Coherent and Incoherent Light
- Shaping the joint spectrum of down-converted photons through optimized custom poling
- Effects of time ordering in quantum nonlinear optics
- Enhanced two-photon absorption using true thermal light
- Tomography and Purification of the Temporal-Mode Structure of Quantum Light
- Spectral properties of high-gain parametric down-conversion
- Pure down-conversion photons through sub-coherence length domain engineering
- Photon bunching in parametric down-conversion with continuous wave excitation
- Design Considerations for High-purity Heralded Single Photon Sources
- Entanglement of Gaussian states using beam splitter
- Time ordering effects in the generation of entangled photons using nonlinear optical processes
- Giant Narrowband Twin-Beam Generation along the Pump Energy Propagation
- Thermal light cannot be represented as a statistical mixture of single pulses
- Gaussian functions are optimal for waveguided nonlinear-quantum-optical processes
- Tomography by noise
- Schmidt-like coherent mode decomposition and spatial intensity correlations of thermal light
- Ring-shaped spectra of parametric down-conversion and entangled photons that never meet
- Generation of ideal thermal light in warm atomic vapor
- Tailored quantum statistics from broadband states of light
- Superbunching pseudothermal light with intensity modulated laser light and rotating groundglass
- First-order decomposition of thermal light in terms of a statistical mixture of pulses
- Thermal Light as a Mixture of Sets of Pulses: the Quasi-1D Example