Nonclassical radiation of a single stored ion

Diedrich, F.; Walther, H.

doi:10.1103/physrevlett.58.203

Cited by 575 publications

(411 citation statements)

References 14 publications

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“…There exist two basic types of singlephoton sources to fulfill this need. The first is based on anti-bunched emission from single-emitter systems, such as atoms [3], ions [4], molecules [5], semiconductors [6], and quantum-dots [7]. The second is based on "heralding," in which one photon (the "signal") is detected and used as a trigger to herald the presence of a paired photon (the "idler").…”

Section: Introductionmentioning

confidence: 99%

Optimized heralding schemes for single photons

2011

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A major obstacle to a practical, heralded source of single photons is the fundamental trade-off between high heralding efficiency and high production rate. To overcome this difficulty, we propose applying sequential spectral and temporal filtering on the signal photons before they are detected for heralding. Based on a multimode theory that takes into account the effect of simultaneous multiple photon-pair emission, we find that these filters can be optimized to yield both a high heralding efficiency and a high production rate. While the optimization conditions vary depending on the underlying photon-pair spectral correlations, all correlation profiles can lead to similarly high performance levels when optimized filters are employed. This suggests that a better strategy for improving the performance of heralded single-photon sources is to adopt an appropriate measurement scheme for the signal photons, rather than tailoring the properties of the photon-pair generation medium.

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Section: Introductionmentioning

confidence: 99%

Optimized heralding schemes for single photons

2011

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“…From the mid-1980s, single ions in traps provided long observation times with one and the same ion [66]. These long series of antibunched photons came closer to a 'photon gun', i.e.…”

Section: Single Photon Sourcesmentioning

confidence: 99%

Quantum Plasmonics: From Quantum Statistics to Quantum Interferences

Martino

2016

Reviews in Plasmonics

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“…Ct, 42.50.Ex, 03.67.Bg At the level of single particles, the quantum nature of light-matter interaction becomes manifest, and the absorption and emission of single photons by single atoms is one of the key physical processes on which quantum optics is built. Seminal examples of phenomena in this respect are photon anti-bunching [1,2], quantum jumps [3,4,5,6], Jaynes-Cummings dynamics [7], and atomphoton entanglement [8,9,10].At the same time, important applications of quantum optics, in particular in quantum optical information technology and in quantum metrology, are based on atom-photon interaction at the single particle level. The most precise clock is realized with a single laser-excited trapped ion [11], and strings of trapped ions have been shown to be promising systems for implementing quantum logical algorithms [12,13,14,15,16] as well as quantum networks [17].…”

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confidence: 99%

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confidence: 99%

Resonant interaction of a single atom with single photons from a down-conversion source

et al. 2010

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We observe the interaction of a single trapped calcium ion with single photons produced by a narrow-band, resonant down-conversion source [A. Haase et al., Opt. Lett. 34, 55 (2009)], employing a quantum jump scheme. Using the temperature dependence of the down-conversion spectrum and the tunability of the narrow source, absorption of the down-conversion photons is quantitatively characterized.PACS numbers: 42.50. Ct, 42.50.Ex, 03.67.Bg At the level of single particles, the quantum nature of light-matter interaction becomes manifest, and the absorption and emission of single photons by single atoms is one of the key physical processes on which quantum optics is built. Seminal examples of phenomena in this respect are photon anti-bunching [1,2], quantum jumps [3,4,5,6], Jaynes-Cummings dynamics [7], and atomphoton entanglement [8,9,10].At the same time, important applications of quantum optics, in particular in quantum optical information technology and in quantum metrology, are based on atom-photon interaction at the single particle level. The most precise clock is realized with a single laser-excited trapped ion [11], and strings of trapped ions have been shown to be promising systems for implementing quantum logical algorithms [12,13,14,15,16] as well as quantum networks [17].A key step in converting quantum optical phenomena into quantum technology tools is the control of the processes at all levels, i.e. of the atomic internal (electronic) and external (motional) state, and of the parameters of the photons, including their spatial and temporal shape, their polarization, and, ideally, their arrival times. Two major strategies may be distinguished how such control is obtained: on the one hand through deterministic operations, whereby typically photons are confined and controlled by high-finesse cavities, on the other hand through probabilistic operations, whereby some experimental signal indicates that the desired interaction process has occurred. Further approaches include collective effects in atomic samples [18,19,20] [33,34], two-and three-ion quantum gates [12,13,35,36], and multi-ion entanglement [14,15]. In terms of control of individual photons, spontaneous parametric down-conversion (SPDC) sources produce entangled photon pairs at high fidelities and rates [37,38], and serve as "heralded" single-photon sources [39].In this context we report the observation of interaction between a single atom and single photons from a spontaneous parametric down-conversion source. The atom in our experiment is a single 40 Ca + ion, trapped in a linear Paul trap and cooled by continuous laser excitation; the photons are produced by a SPDC source, described in more detail in Refs. [40,41], which is tuned to provide entangled photon pairs in the wavelength range of the 4D 3/2 − 4P 3/2 transition in Ca + . In the current experiment we measure the interaction of the single atom with one photon of the entangled pairs by observing quantum jumps, very similar to Dehmelt's proposal for spectroscopy on highly forbidden transi...

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Nonclassical radiation of a single stored ion

Cited by 575 publications

References 14 publications

Optimized heralding schemes for single photons

Optimized heralding schemes for single photons

Quantum Plasmonics: From Quantum Statistics to Quantum Interferences

Resonant interaction of a single atom with single photons from a down-conversion source

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