Multiple-Photon Processes and Higher Order Correlation Functions

Teich, Malvin C.; Wolga, G. J.

doi:10.1103/physrevlett.16.625

Cited by 62 publications

(22 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well known, that higher order absorption processes will probe higher order correlation functions of the light fields [84,85,86,13,87]. In 1968 Mollow used pertubative theory to connect the degree of second order coherence with the TPA rate [13].…”

Section: Appendix B3 Tpa and Photon Statisticsmentioning

confidence: 99%

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Jechow¹

2020

Preprint

View full text Add to dashboard Cite

The interaction between single or a fixed number of photons with a single absorber is of fundamental interest in quantum technology. The harnessing of light matter interactions at the single particle limit has several potential applications ranging from quantum communication and quantum metrology to quantum imaging. In this letter, a setup for heralded two-photon absorption at the single absorber level is proposed. The setup is based on a heralded two-photon source utilizing spontaneous parametric down-conversion, entanglement swapping and sum frequency generation for joint detection. The feasibility of the scheme is discussed by reviewing recent achievements in utilizing entangled and correlated photons for two-photon absorption as well as single photon absorption experiments at the limit of single absorbers in the context of applications in imaging (here mainly microscopy) and spectroscopy.

show abstract

Section: Appendix B3 Tpa and Photon Statisticsmentioning

confidence: 99%

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Jechow¹

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…According to the experimentally measured photoelectron spectrum [6], we assume a bandwidth of 6 eV at 850 eV, which would result in a coherence time of 0.2 fs, assuming FEL operation in the nonsaturated gain region [22,23]. To study the influence of these pulses of limited temporal coherence on the resonant Auger spectrum, we simulate a stochastic ensemble of SASE pulses assuming noise with a Gaussian spectral function with a width equal to the SASE gain bandwidth (for details, see [8,25,26]). We assume a Gaussian intensity envelope of 8.5 fs FWHM for the ensemble average of the SASE pulses.…”

Section: B Sase Pulses Of Limited Temporal Coherencementioning

confidence: 99%

Strongly driven resonant Auger effect treated by an open-quantum-system approach

Rohringer

Santra

2012

Phys. Rev. A

View full text Add to dashboard Cite

We present theoretical studies of a two-step resonant Auger process at high x-ray intensity. Tuning a short x-ray pulse to the initially closed resonant channel of the 1s-2p transition in singly ionized neon, the initially neutral neon target is valence ionized. Subsequently, the strong resonant x-ray field transfers an inner-shell electron to the created outer valence vacancy, thereby creating a core-excited state. The strong resonant coupling, giving rise to Rabi oscillations involving a core transition, results in a modification of the resonant Auger-electron spectral line profile. If the valence photoelectron remains unobserved, the system of the residual ion undergoing the resonant Auger decay can be treated by an open quantum system approach. The resonant Auger-electron spectral line shape is shown to be determined by an analog of the reduced density matrix that depends on two time arguments. The equations of motion of this reduced density matrix are derived and numerical results are presented, in support of the recent experimental verification [E.

show abstract

“…The effects of entanglement can then be observed using a classical detector, such as an intensity meter. The entangled photon holes can also violate Bell's inequality if single-photon detectors are used.Many nonclassical features of two-photon absorption have already been described [3][4][5][6][7][8][9][10][11][12], including an enhanced rate of two-photon absorption when the incident photons are entangled [3,[8][9]12]. The pairs of photons from parametric down-conversion are known to have been emitted at nearly the same time, but that time is completely uncertain in the quantummechanical sense, as illustrated in Fig.…”

mentioning

confidence: 98%

“…Here we show that a classical input state incident on a threelevel atomic medium will undergo two-photon absorption [1][2][3][4][5][6][7][8][9][10][11][12][13] at a rate that is greatly reduced by the generation of entangled photon holes that are somewhat analogous to the holes of semiconductor theory. The effects of entanglement can then be observed using a classical detector, such as an intensity meter.…”

mentioning

confidence: 99%

Entangled Photon Holes

Franson

Pittman

2006

Phys. Rev. Lett.

View full text Add to dashboard Cite

Most experimental demonstrations of entanglement require nonclassical states and correlated measurements of single-photon detection events. It is shown here that entanglement can produce a large decrease in the rate of two-photon absorption for a classical input state that can be observed using classical detectors. These effects can be interpreted as being due to the creation of entangled photon holes that are somewhat analogous to the holes of semiconductor theory.Entanglement is one of the most fundamental properties of quantum systems and it plays a major role in quantum information processing, for example. Here we show that a classical input state incident on a threelevel atomic medium will undergo two-photon absorption [1][2][3][4][5][6][7][8][9][10][11][12][13] at a rate that is greatly reduced by the generation of entangled photon holes that are somewhat analogous to the holes of semiconductor theory. The effects of entanglement can then be observed using a classical detector, such as an intensity meter. The entangled photon holes can also violate Bell's inequality if single-photon detectors are used.Many nonclassical features of two-photon absorption have already been described [3][4][5][6][7][8][9][10][11][12], including an enhanced rate of two-photon absorption when the incident photons are entangled [3,[8][9]12]. The pairs of photons from parametric down-conversion are known to have been emitted at nearly the same time, but that time is completely uncertain in the quantummechanical sense, as illustrated in Fig. 1a [14]. The fact that the photons are incident on any given atom at the same time while their total energy is still well defined gives rise to an increase in the rate of two-photon absorption, which can be linearly dependent on the intensity of the incident beam [8][9]12].The situation of interest here is essentially the inverse of parametric down-conversion, as illustrated in Fig 1b. In the limit of large detunings, three-level atoms will absorb pairs of photons at very nearly the same time, producing a decrease in the probability amplitude for both of the photons to be at the same location. In analogy with the holes of semiconductor theory, the reduced probability amplitudes of Fig. 1b can be viewed as entangled photon holes in an otherwise constant background. Entanglement of this kind can reduce the rate of two-photon absorption to a level that is substantially less than that of classical or semiclassical theory. Roughly speaking, the magnitude of the dips in the probability amplitude will continue to increase until there is no significant probability amplitude for two photons to be found at the same location.The state vectors corresponding to the probability amplitudes of Figs 1a and 1b cannot be written as the product of two single-particle states and both systems are thus in an entangled state. One way to demonstrate the entanglement is by showing that Bell's inequality can be violated, as will be done later in the paper after we first consider the macroscopic effects of the entangled p...

show abstract

Multiple-Photon Processes and Higher Order Correlation Functions

Cited by 62 publications

References 5 publications

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Strongly driven resonant Auger effect treated by an open-quantum-system approach

Entangled Photon Holes

Contact Info

Product

Resources

About