Cavity-induced anticorrelated photon-emission rates of a single ion

Takahashi, Hiroki; Kassa, Ezra; Christoforou, Costas; Keller, Matthias

doi:10.1103/physreva.96.023824

Cited by 29 publications

(32 citation statements)

References 19 publications

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“…Taken together, the calculation results shown in Fig. 8 verify that our design can provide strong coupling for the transitions used in recent ion-fiber cavity experiments [31,49,59,[61][62][63]. Although the simulations of our ion trap design described in the previous sections were carried out for 174 Yb + ions, it would be straightforward to adapt them for 40 Ca + ions.…”

Section: Strong Ion-cavity Couplingsupporting

confidence: 69%

Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap

Lee

Hong

et al. 2019

Phys. Rev. Applied

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We present a numerical study of a MEMS-based design of a fiber cavity integrated with an ion trap system. Each fiber mirror is supported by a microactuator that controls the mirror's position in three dimensions. The mechanical stability is investigated by a feasibility analysis showing that the actuator offers a stable support of the fiber. The actuators move the fibers' positions continuously with a stroke of more than 10 µm, with mechanical resonance frequencies on the order of kHz. A calculation of the trapping potential shows that a separation between ion and fiber consistent with strong ion-cavity coupling is feasible. Our miniaturized ion-photon interface constitutes a viable approach to integrated hardware for quantum information. * These authors contributed equally to this work. † tracy.northup@uibk.ac.at ‡ dicho@snu.ac.kr Au electrodes on fused silica. A MEMS surface ion trap has smaller trap depth than a three-dimensional Paul trap [19] but has the advantage of a reconfigurable planar trapping geometry, along with extensive optical access for laser beams, as required for a large-scale ion trap quantum computer. In 2016, a MEMS trap called the High Optical Access 2.0 trap was developed by Sandia National Laboratory [20], which is widely used by many ion trap researchers today. Topics of active research include the question of how to reduce stray charge accumulation, e.g., on the trap sidewalls [21] or via in situ cleaning [22,23], and how to build increasingly sophisticated structures, e.g., junction traps [24,25] for ion transport, and two-or three-dimensional electrode arrays [26,27].MEMS-based ion traps have advantages in scalability and ease of fabrication, and they can also be easily integrated with other type of MEMS devices. MEMS techniques can also reduce the footprint of the optical cavity system [28,29], particularly for the mirror actuators. The replacement of standard high-finesse mirrors by fiber mirrors has already reduced the physical cavity volume significantly [30,31]; however, when commercial nanopositioning stages are used, they place significant space demands on the in-vacuum assembly. Here, we propose and investigate a novel design for a MEMS-based fibercavity system integrated with a surface ion trap. The fiber system is studied by analyzing the mechanical stability, resonances, and stroke. Furthermore, we calculate the trapping potential seen by the ions in order to discuss the prospects for strong ion-cavity coupling. II. BASIC CONCEPTThe main structure consists of a surface ion trap integrated with a MEMS-based fiber cavity system ( Fig. 1(a)). The starting point is a microfabricated chip, arXiv:1907.07594v1 [quant-ph]

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Section: Strong Ion-cavity Couplingsupporting

confidence: 69%

Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap

Lee

Hong

et al. 2019

Phys. Rev. Applied

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“…Materials like indium tin oxide (ITO) open up the possibility to produce transparent electrodes [23], but they also introduce optical losses precluding their use in high-finesse cavities. Micro-fabricated cavities are especially interesting, as these may be used both for classical optics applications and for cavity quantum electrodynamics (cavity QED) experiments, which enable quantum interfaces between photons and ions [24,25,26,27,28]. Research into surface charges on dielectrics dates back many decades [29] and has been both extensive and diverse [30,31].…”

Section: Introductionmentioning

confidence: 99%

Probing surface charge densities on optical fibers with a trapped ion

et al. 2020

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We describe a novel method to measure the surface charge densities on optical fibers placed in the vicinity of a trapped ion, where the ion itself acts as the probe. Surface charges distort the trapping potential, and when the fibers are displaced, the ion's equilibrium position and secular motional frequencies are altered. We measure the latter quantities for different positions of the fibers and compare these measurements to simulations in which unknown charge densities on the fibers are adjustable parameters. Values ranging from −10 to +50 e/µm 2 were determined. Our results will benefit the design and simulation of miniaturized experimental systems combining ion traps and integrated optics, for example, in the fields of quantum computation, communication and metrology. Furthermore, our method can be applied to any setup in which a dielectric element can be displaced relative to a trapped charge-sensitive particle.

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“…The main challenge in ion-cavity systems is to achieve small enough mode volume without disturbing the trapping field when incorporating dielectric cavity mirrors near the trapping region. In this regard employing laser machined fiber-based Fabry-Perot cavities (FFPCs) has proven to be a viable solution and resulted in several successful implementations recently [24][25][26]. Based on the ion trap with an integrated FFPC presented in [26,27], in this work we achieve a coherent ion-cavity coupling of g = 2π × (12.3 ± 0.1) MHz greater than both atomic decay rate of the P 1/2 state of γ = 2π × 11.5 MHz [28] and cavity decay rate of κ = 2π × (4.1 ± 0.1) MHz.…”

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confidence: 99%

“…1(b)). The ion is Doppler cooled on the S 1/2 − P 3/2 transition with a laser at 393 nm to circumvent inefficient cooling on the the S 1/2 −P 1/2 transition caused by the back action of the strong Purcell effect when the cavity is near resonant on the P 1/2 − D 3/2 transition [26]. Lasers at 850 nm and 854 nm repump the ion from the meta-stable D states into the S 1/2 state for continuous cooling.…”

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confidence: 99%

Strong Coupling of a Single Ion to an Optical Cavity

et al. 2020

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Strong coupling between an atom and an electromagnetic resonator is an important condition in cavity quantum electrodynamics (QED). While strong coupling in various physical systems has been achieved so far, it remained elusive for single atomic ions. In this paper we demonstrate for the first time the coupling of a single ion to an optical cavity with a coupling strength exceeding both atomic and cavity decay rates. We use cavity assisted Raman spectroscopy to precisely characterize the ion-cavity coupling strength and observe a spectrum featuring the normal mode splitting in the cavity transmission due to the ion-cavity interaction. Our work paves the way towards new applications of cavity QED utilizing single trapped ions in the strong coupling regime for quantum optics and quantum technologies.

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Cavity-induced anticorrelated photon-emission rates of a single ion

Cited by 29 publications

References 19 publications

Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap

Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap

Probing surface charge densities on optical fibers with a trapped ion

Strong Coupling of a Single Ion to an Optical Cavity

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