Optimization of Yb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>fluorescence and hyperfine-qubit detection

Ejtemaee, Sara; Thomas, Rohan; Haljan, P. C.

doi:10.1103/physreva.82.063419

Cited by 31 publications

(42 citation statements)

References 41 publications

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“…The ion trap used in this experiment [31] is a millimeter-scale linear rf Paul trap [11,32,33] composed of four rods in a square configuration and two end-cap electrodes, as shown in Fig. 2.1.…”

Section: Ion-trap Theorymentioning

confidence: 99%

“…The level structure and fluorescence behaviour is more complicated than for the 172 Yb + isotope, which has no hyperfine structure; however, we have chosen to use the 171 Yb + ions as the primary component of the ion crystals in our experiment since our group has recently made a careful study and calibration of the fluorescence response of 171 Yb + for quantum computing applications [31].…”

Section: Review Of Basic Theorymentioning

confidence: 99%

“…The magneticfield approach is adopted in our experiment due to its simplicity, and the field also serves to define a quantization axis. Previous experiments have been performed in our group to study the resonance fluorescence of a single trapped 171 Yb + ion [31] and to verify its predicted behaviour as a function of laser parameters and magnetic field [32], including the effect of the magnetic field at counteracting the coherent population trapping. Further details can be found in Refs.…”

Section: Review Of Basic Theorymentioning

confidence: 99%

“…Further details can be found in Refs. [32] and [31]. We simply quote here the result for the steadystate spontaneous scattering rate γ sc = γP e , which is determined by the natural linewidth, γ = 2π · 19.6 MHz, of the 2 S 1/2 → 2 P 1/2 transition and the steady-state population P e of the excited 2 P 1/2 (F = 0) state.…”

Section: Review Of Basic Theorymentioning

confidence: 99%

“…With slight modification from Refs. [31] and [32], the expression for P e as a function of magnetic field and as a function of laser power, detuning and polarization is as follows: In the equations above, θ BE denotes the angle between the magnetic field and the polarization direction of the 369.5-nm laser, and the definition of F(θ BE ) is purely for notational simplicity in subsequent expressions. Further, δ B = µ B B/h is the frequency splitting between adjacent Zeeman sublevels of the F = 1 ground state under magnetic field B, and ∆ = ω − ω 0 gives the detuning of the laser from the resonance when B = 0.…”

Section: Review Of Basic Theorymentioning

confidence: 99%

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Hopping of an impurity defect in ion crystals in linear traps

Liang

Haljan

2011

Phys. Rev. A

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Ordered arrays of laser-cooled, trapped ions or "ion crystals" are a novel form of matter with a rich variety of equilibrium structures and dynamics. In this thesis, we investigate the hopping mobility of a 172 Yb + impurity ion within a crystal of 171 Yb + ions, confined in a linear Paul trap. The site-to-site hopping of the impurity ion, distinguished by a lack of fluorescence, is studied as a function of the 171 Yb + laser-cooling parameters and of the anisotropy of the trapping potential. The onset of rapid hopping is found to occur when average thermal energies become comparable to the Coulomb potential energy. Furthermore, the hopping rate is enhanced at trap anisotropies near the critical value for the structural phase transition to a two-dimensional zigzag phase. The impurity ion has the highest hopping mobility near the centre of the crystal, which may be intrinsic to the crystal structure and dynamics near the zigzag transition. Simplified molecular-dynamics simulations reproduce several features of the experimental results.iii To my parents, my aunt and my girlfriend.

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Section: Ion-trap Theorymentioning

confidence: 99%

Section: Review Of Basic Theorymentioning

confidence: 99%

Section: Review Of Basic Theorymentioning

confidence: 99%

Section: Review Of Basic Theorymentioning

confidence: 99%

Section: Review Of Basic Theorymentioning

confidence: 99%

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Hopping of an impurity defect in ion crystals in linear traps

Liang

Haljan

2011

Phys. Rev. A

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Single‐ion spectroscopy system for the ²S_1/2(F = 0) − ²D_3/2(F = 2) transition in ¹⁷¹Yb⁺

et al. 2016

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We report on our system and scheme for single‐ion spectroscopy of the 2normalS1/2(F=0)−2normalD3/2(F=2) clock transition in 171Yb+. Spectroscopy of the clock transition requires decoupling of the 2normalD3/2(F=2) state from the laser cooling cycle. We investigate this decoupling of the 2normalD3/2(F=2) state by using independent light sources for driving of all the transitions between the hyperfine structures contained in the cooling and repumping transitions. We observe the carrier spectrum of the mF=0−mF′=0 magnetic‐insensitive transition with a spectral width of 380 Hz.

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A high-fidelity quantum matter-link between ion-trap microchip modules

et al. 2023

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System scalability is fundamental for large-scale quantum computers (QCs) and is being pursued over a variety of hardware platforms. For QCs based on trapped ions, architectures such as the quantum charge-coupled device (QCCD) are used to scale the number of qubits on a single device. However, the number of ions that can be hosted on a single quantum computing module is limited by the size of the chip being used. Therefore, a modular approach is of critical importance and requires quantum connections between individual modules. Here, we present the demonstration of a quantum matter-link in which ion qubits are transferred between adjacent QC modules. Ion transport between adjacent modules is realised at a rate of 2424 s−1 and with an infidelity associated with ion loss during transport below 7 × 10−8. Furthermore, we show that the link does not measurably impact the phase coherence of the qubit. The quantum matter-link constitutes a practical mechanism for the interconnection of QCCD devices. Our work will facilitate the implementation of modular QCs capable of fault-tolerant utility-scale quantum computation.

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Optimization of Yb+fluorescence and hyperfine-qubit detection

Cited by 31 publications

References 41 publications

Hopping of an impurity defect in ion crystals in linear traps

Hopping of an impurity defect in ion crystals in linear traps

Single‐ion spectroscopy system for the ²S_1/2(F = 0) − ²D_3/2(F = 2) transition in ¹⁷¹Yb⁺

A high-fidelity quantum matter-link between ion-trap microchip modules

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Optimization of Yb+fluorescence and hyperfine-qubit detection

Cited by 31 publications

References 41 publications

Hopping of an impurity defect in ion crystals in linear traps

Hopping of an impurity defect in ion crystals in linear traps

Single‐ion spectroscopy system for the 2S1/2(F = 0) − 2D3/2(F = 2) transition in 171Yb+

A high-fidelity quantum matter-link between ion-trap microchip modules

Contact Info

Product

Resources

About

Single‐ion spectroscopy system for the ²S_1/2(F = 0) − ²D_3/2(F = 2) transition in ¹⁷¹Yb⁺