Photon bunching and multiphoton interference in parametric down-conversion

Ou, Z. Y.; Rhee, June-Koo Kevin; Lj, Wang

doi:10.1103/physreva.60.593

Cited by 106 publications

(146 citation statements)

References 23 publications

Supporting

Mentioning

141

Contrasting

Order By: Relevance

“…Since SPDC production is far from being mono-mode, Yurke and Potasek's analysis was not realistic; however, the thermal nature of a multi-mode SPDC process was later confirmed by Tapster and Rarity [13], and in a more general way by Ou, Rhee and Wang [4,14], who analysed the case of sources with pulsed pumping. In their derivation, what is actually measured is the pulse integral of G (1) and G (2) , i.e., the probabilities of one or two photons in the pulse.…”

Section: A Field Statistics and Theoretical Description Of Spdcmentioning

confidence: 99%

“…In their derivation, what is actually measured is the pulse integral of G (1) and G (2) , i.e., the probabilities of one or two photons in the pulse. With time resolution limited to the whole pulse, one must resort to test the "bunching excess", which was shown [4] to be essentially the ratio of the coherence time τ c of the photons in the inspected arm and the duration τ p of the pulse, when τ c ≪ τ p . Shorter pump pulses then increase the excess, but, contrary to intuition, the limit of a very short pulse is not sufficient alone to guarantee a full bunching peak (g (2) (0) = 2).…”

Section: A Field Statistics and Theoretical Description Of Spdcmentioning

confidence: 99%

“…Such setups are however limited by the possibility that additional pairs are created within the window determined by the pump-pulse duration or by the electronic gate width of the single photon detectors (for continuous sources). In multi-photon interference experiments, additional pairs in general affect the purity of the investigated state [4]. In quantum cryptography [5] instead, multi-photon pairs may constitute a security threat, since their information-carrying degree of freedom (typically polarisation) might be correlated [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photon bunching in parametric down-conversion with continuous-wave excitation

et al. 2009

View full text Add to dashboard Cite

The first direct measurement of photon bunching (g (2) correlation function) in one output arm of a spontaneous-parametric-down-conversion source operated with a continuous pump laser in the single-photon regime is demonstrated. The result is in agreement with the statistics of a thermal field of the same coherence length, and shows the feasibility of investigating photon statistics with compact cw-pumped sources. Implications for entanglement-based quantum cryptography are discussed.

show abstract

Section: A Field Statistics and Theoretical Description Of Spdcmentioning

confidence: 99%

Section: A Field Statistics and Theoretical Description Of Spdcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photon bunching in parametric down-conversion with continuous-wave excitation

et al. 2009

View full text Add to dashboard Cite

show abstract

“…The effect of misalignment can be incorporated in our formulism by introducing a spatial factor of e ikH x or e ikV x in Eq. (28) [22]. For simplicity, we only consider a misalignment in propagation direction for the spatial mismatch.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…The multi-mode theory for a type-II parametric downconversion gives the quantum state in the form of [22] …”

Section: B Multi-mode Treatmentmentioning

confidence: 99%

Projection measurement of the maximally entangledN-photon state for a demonstration of theN-photon de Broglie wavelength

Sun

Guo

2006

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

We construct a projection measurement process for the maximally entangled N-photon state (the NOON-state) with only linear optical elements and photodetectors. This measurement process will give null result for any N-photon state that is orthogonal to the NOON state. We examine the projection process in more detail for N = 4 by applying it to a four-photon state from type-II parametric down-conversion. This demonstrates an orthogonal projection measurement with a null result. This null result corresponds to a dip in a generalized Hong-Ou-Mandel interferometer for four photons. We find that the depth of the dip in this arrangement can be used to distinguish a genuine entangled four-photon state from two separate pairs of photons. We next apply the NOON state projection measurement to a four-photon superposition state from two perpendicularly oriented type-I parametric down-conversion processes. A successful NOON state projection is demonstrated with the appearance of the four-photon de Broglie wavelength in the interference fringe pattern.

show abstract