Deterministic single-photon source from a single ion

Barros, Helena G.; Stute, Andreas; Northup, Tracy E.; Russo, C.; Schmidt, Piet O.; Blatt, R.

doi:10.1088/1367-2630/11/10/103004

Cited by 137 publications

(155 citation statements)

References 37 publications

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“…5 Several research groups are currently working on the technological challenge of integrating ions and cavities, and the coupling of ions to the field of a high-finesse cavity has already been shown in a range of setups. [6][7][8][9][10][11] Single photons have been produced with a trapped ion inside a cavity, 12,13 and entanglement between single ions and single cavity photons has recently been demonstrated. 14 For a high-fidelity ion-photon quantum interface, the coherent coupling strength must be larger than the ion's rate of spontaneous decay.…”

Section: Introductionmentioning

confidence: 99%

Integrated fiber-mirror ion trap for strong ion-cavity coupling

Brandstätter

McClung

Schüppert

et al. 2013

Review of Scientific Instruments

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We present and characterize fiber mirrors and a miniaturized ion-trap design developed to integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity-QED experiments with trapped ions. Our fiber-mirror fabrication process not only enables the construction of FFPCs with small mode volumes, but also allows us to minimize the influence of the dielectric fiber mirrors on the trapped-ion pseudopotential. We discuss the effect of clipping losses for long FFPCs and the effect of angular and lateral displacements on the coupling efficiencies between cavity and fiber. Optical profilometry allows us to determine the radii of curvature and ellipticities of the fiber mirrors. From finesse measurements, we infer a single-atom cooperativity of up to 12 for FFPCs longer than 200 μm in length; comparison to cavities constructed with reference substrate mirrors produced in the same coating run indicates that our FFPCs have similar scattering losses. We characterize the birefringence of our fiber mirrors, finding that careful fiber-mirror selection enables us to construct FFPCs with degenerate polarization modes. As FFPCs are novel devices, we describe procedures developed for handling, aligning, and cleaning them. We discuss experiments to anneal fiber mirrors and explore the influence of the atmosphere under which annealing occurs on coating losses, finding that annealing under vacuum increases the losses for our reference substrate mirrors. X-ray photoelectron spectroscopy measurements indicate that these losses may be attributable to oxygen depletion in the mirror coating. Special design considerations enable us to introduce a FFPC into a trapped ion setup. Our unique linear Paul trap design provides clearance for such a cavity and is miniaturized to shield trapped ions from the dielectric fiber mirrors. We numerically calculate the trap potential in the absence of fibers. In the experiment additional electrodes can be used to compensate distortions of the potential due to the fibers. Home-built fiber feedthroughs connect the FFPC to external optics, and an integrated nanopositioning system affords the possibility of retracting or realigning the cavity without breaking vacuum.

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Section: Introductionmentioning

confidence: 99%

Integrated fiber-mirror ion trap for strong ion-cavity coupling

Brandstätter

McClung

Schüppert

et al. 2013

Review of Scientific Instruments

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“…Coulomb-Frenkel-Kontorova model [23][24][25][26]40]). As demonstrated in [17], localizing an ion in a standing wave cavity field also allows for a better control of the ion-cavity coupling strength, which can be of interest for quantum information processing applications, such as single-photon generation [41,42], quantum memory [27,28], photon counters [29], single ion-photon interfaces [43,44], or for cavity-mediated cooling [45].…”

Section: Future Prospectsmentioning

confidence: 99%

Sub-micron positioning of trapped ions with respect to the absolute center of a standing-wave cavity field

et al. 2013

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We demonstrate that it is possible, with sub-micron precision, to locate the absolute center of a Fabry-Pérot resonator oriented along the rf-field-free axis of a linear Paul trap through the application of two simultaneously resonating optical fields. In particular, we apply a probe field, which is near-resonant with an electronic transition of trapped ions, simultaneously with an offresonant strong field acting as a periodic AC Stark-shifting potential. Through the resulting spatially modulated fluorescence signal we can find the cavity center of an 11.7 mm-long symmetric FabryPérot cavity with a precision of ±135 nm, which is smaller than the periodicity of the individual standing wave fields. This can e.g. be used to position the minimum of the axial trap potential with respect to the center of the cavity at any location along the cavity mode.

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“…Beside the deterministic single-photon sources based on various single quantum emitters such as single atoms [19,20], ions [21,22], molecules [23,24], diamond color centers [25][26][27], and quantum dots [28][29][30], probabilistic single-photon sources offer an alternative way to address this problem. This approach is based on the generation of correlated photon pairs.…”

Section: Introductionmentioning

confidence: 99%

Optimization of periodic single-photon sources based on combined multiplexing

et al. 2016

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We consider periodic single-photon sources with combined multiplexing in which the outputs of several time-multiplexed sources are spatially multiplexed. We give a full statistical description of such systems in order to optimize them with respect to maximal single-photon probability. We carry out the optimization for a particular scenario which can be realized in bulk optics and its expected performance is extremely good at the present state of the art. We find that combined multiplexing outperforms purely spatially or time-multiplexed sources for certain parameters only, and we characterize these cases. Combined multiplexing can have the advantages of possibly using less nonlinear sources, achieving higher repetition rates, and the potential applicability for continuous pumping. We estimate an achievable single-photon probability between 85% and 89%.

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Deterministic single-photon source from a single ion

Cited by 137 publications

References 37 publications

Integrated fiber-mirror ion trap for strong ion-cavity coupling

Integrated fiber-mirror ion trap for strong ion-cavity coupling

Sub-micron positioning of trapped ions with respect to the absolute center of a standing-wave cavity field

Optimization of periodic single-photon sources based on combined multiplexing

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