Thermal light as a mixture of sets of pulses: the quasi-1D example

Brańczyk, Agata M.; Chenu, Aurélia; Sipe, J. E.

doi:10.1364/josab.34.001536

Cited by 3 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, if the initial state is a laser pulse the system is blind to a possible finite collapse time. The same is true for chaotic light, as thermal states can be expanded on the set of coherent states 16 , and would therefore result in a separable state after the BS. This is a very important point for this experiment: the fact that no additional delay would be observed using lasers implies that such an effect would be undetectable in time of flight measurements, in particular in LIDAR systems 23 (even so called single-photon LIDAR systems work with Single Photon Detectors, but use laser pulses).…”

Section: Methodsmentioning

confidence: 91%

See 1 more Smart Citation

Experimental test of the collapse time of a delocalized photon state

Garrisi

Massara

Zambianchi

et al. 2019

Sci Rep

View full text Add to dashboard Cite

We investigate whether the collapse of the quantum state of a single photon split between two space-like separated places takes a nonvanishing time. We realize this by using a source of heralded single photons, then splitting the resulting single photon state and letting it propagate over distances much larger than the experimental time resolution times the speed of light c . We find no additional delay within our accuracy and set a lower limit for the speed of collapse of the quantum state to 1550 c .

show abstract

Section: Methodsmentioning

confidence: 91%

“…Should the input be a pulse of thermal light (as in the case of lamps or LEDs), then one has to take into account that a single mode of thermal light (see for instance ref. 16 ) can be described by the statistical operatorwhere 〈 n 〉 is given byand α are coherent states as in Eq. (2).…”

Section: Methodsmentioning

confidence: 99%

Experimental test of the collapse time of a delocalized photon state

Garrisi

Massara

Zambianchi

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Thermal light cannot be represented as a statistical mixture of single pulses [62], but one can construct mixtures of single pulses that yield the same first-order temporal correlation function as thermal light [63]. In a onedimensional waveguide, thermal light was shown to decompose into a statistical mixture of sets of coherent pulses [64]. Here, we show that partiallyspectrally-coherent light can be decomposed into a tensor product of states prepared in spectral Schmidt modes, each with geometric photon-number statistics.…”

Section: Discussionmentioning

confidence: 99%

Broadband pseudothermal states with tunable spectral coherence generated via nonlinear optics

Quesada

Brańczyk

2019

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

It is well known that the reduced state of a two-mode squeezed vacuum state is a thermal statei.e. a state whose photon-number statistics obey a geometric distribution. More exotic 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.

show abstract

“…Since then, this problem has been revisited recurrently in different contexts either in physics or in engineering. Examples are abundant in condensed matter, statistical mechanics and quantum field theory among others [3][4][5][6].…”

mentioning

confidence: 99%

“…This result is not obvious since, unlike our model, the ZRP describes interacting particles. Yet, based on this identity, we use the result, proven for ZRP [22], that the long time probability P ∞ (η) solution of L [P ∞ (η)] = 0 in (5), is a product measure, namely,…”

mentioning

confidence: 99%

Hydrodynamic description of Non-Equilibrium Radiation

Rotstein¹,

Akkermans²

2022

Preprint

View full text Add to dashboard Cite

Non-equilibrium radiation is addressed theoretically by means of a stochastic lattice-gas model. We consider a resonating transmission line composed of a chain of radiation resonators, each at a local equilibrium, whose boundaries are in thermal contact with two blackbody reservoirs at different temperatures. In the long chain limit, the stationary state of the non-equilibrium radiation is obtained in a closed form. The corresponding spectral energy density departs from the Planck expression, yet it obeys a useful scaling form. A macroscopic fluctuating hydrodynamic limit is obtained leading to a Langevin equation whose transport parameters are calculated. In this macroscopic limit, we identify a local temperature which characterises the spectral energy density. The generality of our approach is discussed and applications for the interaction of non-equilibrium radiation with matter are suggested.

show abstract

Thermal light as a mixture of sets of pulses: the quasi-1D example

Cited by 3 publications

References 17 publications

Experimental test of the collapse time of a delocalized photon state

Experimental test of the collapse time of a delocalized photon state

Broadband pseudothermal states with tunable spectral coherence generated via nonlinear optics

Hydrodynamic description of Non-Equilibrium Radiation

Contact Info

Product

Resources

About