Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures

Rančić, Miloš; Dantec, Marianne Le; Lin, Sen; Bertaina, Sylvain; Chanelière, Thierry; Serrano, Diana; Goldner, Philippe; Liu, Ren‐Bao; Flurin, Emmanuel; Estève, D.; Vion, Denis; Bertet, Patrice

doi:10.1103/physrevb.106.144412

Cited by 14 publications

(5 citation statements)

References 48 publications

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“…Cross-relaxation processes (or spin flip-flops) between spins cause the local magnetic environment to fluctuate over time, giving rise to spectral diffusion [20,30,32]. Reducing the temperature of the spin bath polarizes it, reducing the rate of flip-flops and, consequently, the effects of spectral diffusion [33][34][35]. Figure 3 shows such an increase in coherence time with decreasing temperature for both the 145 Nd and nat Yb samples: in Nd from 24(1) μs at 1.2 K to 0.41(1) ms at 14 mK and in nat Yb increasing from 33(7) μs to 3.4(1) ms over the same temperature range.…”

Section: Temperature Dependencementioning

confidence: 99%

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

et al. 2022

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Rare-earth doped crystals have long coherence times and the potential to provide quantum interfaces between microwave and optical photons. Such applications benefit from a high cooperativity between the spin ensemble and a microwave cavity-this motivates an increase in the rare-earth ion concentration which in turn impacts the spin coherence lifetime. We measure spin dynamics of two rare-earth spin species, 145 Nd and Yb, doped into Y 2 SiO 5 , coupled to a planar microwave resonator in the high-cooperativity regime, in the temperature range 1.2 K to 14 mK. We identify relevant decoherence mechanisms, including instantaneous diffusion arising from resonant spins and temperature-dependent spectral diffusion from impurity electron and nuclear spins in the environment. We explore two methods to mitigate the effects of spectral diffusion in the Yb system in the low-temperature limit, first, using magnetic fields of up to 1 T to suppress impurity spin dynamics and, second, using transitions with low effective g factors to reduce sensitivity to such dynamics. Finally, we demonstrate how the "clock transition" present in the 171 Yb system at zero field can be used to increase coherence times up to T 2 = 6(1) ms.

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Section: Temperature Dependencementioning

confidence: 99%

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

et al. 2022

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“…As a result, the ions experience enhanced cross-relaxation or quenching effects. The enhancement of nonradiative decay in high atomic density rare-earth crystals has been observed [23], while instantaneous spectral diffusion and excitation-induced decoherence have been extensively studied in various rare-earth doped systems [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures

Lei,

Kling,

Hosseini

2024

J. Opt.

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We investigate the optical lifetime, decay characteristics, spectral linewidth and energy level properties of thulium ions doped in a KY(WO$_{\text{4}}$)$_{\text{2}}$ crystal at 4K temperature. High doping concentration of thulium ions with inhomogeneous broadening allow us to study nonradiative behaviors, instantaneous spectral diffusion, and spectral power broadening in this solid-state material. The theoretical consideration of ion-ion interactions is shown to accurately characterize the absorption, decay and other spectral behaviors of Tm$^{\text{3+}}$ ions. We observe more than ten-fold reduction in the decay time of $^3$H$_4$ state and about three-fold reduction in the spectral-hole lifetime as we approach the center of the inhomogeneous broadening, corresponding to higher optical densities.

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“…In these light-matter interfaces, the optical depth of the medium is an important figure of merit since it enables high storage and retrieval efficiency [10,11,5]. However, reaching large optical depths usually comes with working with large atomic concentrations, leading to reinforced ion-ion interactions and thereby enhanced decoherence [12,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Strain-mediated ion-ion interaction in rare-earth-doped solids

Louchet-Chauvet¹,

Chanelière²

2023

Preprint

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It was recently shown that the optical excitation of rare-earth ions produces a local change of the host matrix shape, attributed to a change of the rare-earth ion's electronic orbital geometry. In this work we investigate the consequences of this piezoorbital backaction and show from a macroscopic model how it yields a disregarded ion-ion interaction mediated by mechanical strain. This interaction scales as 1/r 3 , similarly to the other archetypal ion-ion interactions, namely electric and magnetic dipole-dipole interactions. We quantitatively assess and compare the magnitude of these three interactions from the angle of the instantaneous spectral diffusion mechanism, and reexamine the scientific literature in a range of rare-earth doped systems in the light of this generally underestimated contribution.

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Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures

Cited by 14 publications

References 48 publications

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures

Strain-mediated ion-ion interaction in rare-earth-doped solids

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Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures

Cited by 14 publications

References 48 publications

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime

Optical characterizations of densely doped Tm3+:KYW crystals at low temperatures

Strain-mediated ion-ion interaction in rare-earth-doped solids

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Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures