Single-photon frequency conversion in nonlinear crystals

Blum, Susanne; Olivares-Rentería, G. A.; Ottaviani, Carlo; Becher, Christoph; Morigi, Giovanna

doi:10.1103/physreva.88.053807

Cited by 7 publications

(5 citation statements)

References 48 publications

(115 reference statements)

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“…The model is one dimensional, the transmission line is at x < 0, and the cavity mirror is at position x = 0. The single incident photon is described by a superposition of single excitations of the modes of the external field [21]…”

Section: B Initial State and Target Statementioning

confidence: 99%

Optimal storage of a single photon by a single intra-cavity atom

et al. 2018

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We theoretically analyze the efficiency of a quantum memory for single photons. The photons propagate along a transmission line and impinge on one of the mirrors of a high-finesse cavity. The quantum memory is constituted by a single atom within the optical resonator. Photon storage is realized by the controlled transfer of the photonic excitation into a metastable state of the atom and occurs via a Raman transition with a suitably tailored laser pulse, which drives the atom. Our study is supported by numerical simulations, in which we include the modes of the transmission line and we use the experimental parameters of existing experimental setups. It reproduces the results derived using input-output theory in the corresponding regimes and can be extended to compute dynamics where the input-output formalism cannot be straightforwardly applied. Our analysis determines the maximal storage efficiency, namely, the maximal probability to store the photon in a stable atomic excitation, in the presence of spontaneous decay and cavity parasitic losses. It further delivers the form of the laser pulse that achieves the maximal efficiency by partially compensating parasitic losses. We numerically assess the conditions under which storage based on adiabatic dynamics is preferable to non-adiabatic pulses. Moreover, we systematically determine the shortest photon pulse that can be efficiently stored as a function of the system parameters.

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Section: B Initial State and Target Statementioning

confidence: 99%

Optimal storage of a single photon by a single intra-cavity atom

et al. 2018

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“…The quantization of the index ν predicted by the classical analysis can be at best captured in the secondquantization framework of SFG [44,[47][48][49][50][51]. Here, the signal and SFG photons undergo in tandem a quantum walk on a synthetic lattice with nontrivial topology in frequency space, the index ν corresponding to a topological invariant of the lattice.…”

Section: B Quantum Analysismentioning

confidence: 99%

Topological aspects in nonlinear optical frequency conversion

Longhi

2022

Phys. Rev. A

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Nonlinear optical frequency conversion, observed more than half a century ago, is a corner stone in modern applications of nonlinear and quantum optics. It is well known that frequency conversion processes are constrained by conservation laws, such as momentum conservation that requires phase matching conditions for efficient conversion. However, conservation laws alone could not fully capture the features of nonlinear frequency conversion. Here it is shown that topology can provide additional constraints in nonlinear multi-frequency conversion processes. Unlike conservation laws, a topological constraint concerns with the conserved properties under continuous deformation, and can be regarded as a new indispensable degree of freedom to describe multi-frequency processes. We illustrate such a paradigm by considering sum frequency generation under a multi-frequency pump wave, showing that, akin topological phases in topological insulators, topological phase transitions can be observed in the frequency conversion process both at classical and quantum level.

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“…To establish a quantum network, quantum nodes like single trapped atoms or ions, emitting in the visible or near infrared spectral region, have to be interconnected via photons. To this end, bridging the gap between low loss telecom wavelengths for long-range communication and the atomic wavelengths quantum frequency conversion (QFC) is necessary [14][15][16]. In the present experiment we produce frequency-degenerate photon pairs, generated by spontaneous parametric down conversion (SPDC), resonant with an atomic transition of 40 Ca + at 854 nm.…”

Section: Introductionmentioning

confidence: 98%

Quantum and classical telecommunication channel multiplexing

Lenhard,

Brito,

Kucera

et al. 2015

Preprint

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We demonstrate the multiplexing of a classical coherent and a quantum state of light in a single telecommunciation fiber. For this purpose we make use of spontaneous parametric down conversion and quantum frequency conversion to generate photon pairs at 854 nm and the telecom O-band. The herald photon triggers a telecom C-band laser pulse. The telecom single photon and the laser pulse are combined and coupled to a standard telecom fiber. Low background time correlation of the classical and quantum signal behind the fiber shows successful telecommunication channel multiplexing.

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Single-photon frequency conversion in nonlinear crystals

Cited by 7 publications

References 48 publications

Optimal storage of a single photon by a single intra-cavity atom

Optimal storage of a single photon by a single intra-cavity atom

Topological aspects in nonlinear optical frequency conversion

Quantum and classical telecommunication channel multiplexing

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