arXiv:2211.02470 · Physical Review Research

S01−P23 magnetic quadrupole transition in neutral strontium

Jan Trautmann, Dimitry Yankelev, V. Klüsener, Annie Jihyun Park, Immanuel Bloch, Sebastian Blatt

Published Mar 30, 2023• 19 citations

Abstract

We present a detailed investigation of the ultranarrow magnetic-quadrupole $^{1}\mathrm{S}_{0}\text{\ensuremath{-}}^{3}\mathrm{P}_{2}$ transition in neutral strontium and show how it can be made accessible for quantum simulation and quantum computation. By engineering the light shift in a one-dimensional optical lattice, we perform high-resolution spectroscopy and observe the characteristic absorption patterns for a magnetic quadrupole transition. We measure an absolute transition frequency of $446,647,242,704(2)$ kHz in $^{88}\mathrm{Sr}$ and an $^{88}\mathrm{Sr}\text{\ensuremath{-}}^{87}\mathrm{Sr}$ isotope shift of $+62.91(4)$ MHz. In a proof-of-principle experiment, we use this transition to demonstrate local addressing in an optical lattice with 532 nm spacing with a Rayleigh-criterion resolution of $494(45)$ nm. Our results pave the way for applications of the magnetic quadrupole transition as an optical qubit and for single-site addressing in optical lattices.

DOI: 10.1103/physrevresearch.5.013219

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arXiv:2211.02470 · Physical Review Research

S01−P23 magnetic quadrupole transition in neutral strontium

Jan Trautmann, Dimitry Yankelev, V. Klüsener, Annie Jihyun Park, Immanuel Bloch, Sebastian Blatt

Published Mar 30, 2023• 19 citations

arXiv HTML PDF

Abstract

We present a detailed investigation of the ultranarrow magnetic-quadrupole

^{1}\mathrm{S}_{0}\text{\ensuremath{-}}^{3}\mathrm{P}_{2}

transition in neutral strontium and show how it can be made accessible for quantum simulation and quantum computation. By engineering the light shift in a one-dimensional optical lattice, we perform high-resolution spectroscopy and observe the characteristic absorption patterns for a magnetic quadrupole transition. We measure an absolute transition frequency of

446,647,242,704(2)

kHz in

^{88}\mathrm{Sr}

and an

^{88}\mathrm{Sr}\text{\ensuremath{-}}^{87}\mathrm{Sr}

isotope shift of

+62.91(4)

MHz. In a proof-of-principle experiment, we use this transition to demonstrate local addressing in an optical lattice with 532 nm spacing with a Rayleigh-criterion resolution of

494(45)

nm. Our results pave the way for applications of the magnetic quadrupole transition as an optical qubit and for single-site addressing in optical lattices.

DOI: 10.1103/physrevresearch.5.013219

Related papers

Long-Lived Coherence on a μ Hz Scale Optical Magnetic Quadrupole Transition

V. Klüsener, Sebastian Pucher, Dimitry Yankelev +7 more

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Absolute frequency measurements on the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition in strontium

Shengnan Zhang, B. S. Tiwari, Sandhya Ganesh +2 more

We report the first absolute frequency measurements for the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition at 394 nm for all the stable strontium isotopes by utilizing repumping induced spectroscopy in a magneto-optical trap. Absolute transition frequency is measured to be 760524409251(25) kHz for Sr 88 . With reference to Sr 88 , the isotope shifts are measured to be 91052(35), 54600(33), and 51641(28) kHz for Sr 84 , Sr 86 , and Sr 87 , respectively. We calculate the hyperfine constants A and B for the fermionic isotope Sr 87 at kHz level. Furthermore, we perform King plot analysis by combining isotope shifts on the 689-nm transition to our data. Published by the American Physical Society 2024We report the first absolute frequency measurements for the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition at 394 nm for all the stable strontium isotopes by utilizing repumping induced spectroscopy in a magneto-optical trap. Absolute transition frequency is measured to be 760524409251(25) kHz for Sr 88 . With reference to Sr 88 , the isotope shifts are measured to be 91052(35), 54600(33), and 51641(28) kHz for Sr 84 , Sr 86 , and Sr 87 , respectively. We calculate the hyperfine constants A and B for the fermionic isotope Sr 87 at kHz level. Furthermore, we perform King plot analysis by combining isotope shifts on the 689-nm transition to our data. Published by the American Physical Society 2024

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Spectroscopy of the $5s5p$ $ ^3 P_0 \rightarrow 5s5d$ $ ^3 D_1 $ transition of strontium using laser cooled atomsSpectroscopy of the $5s5p$ $ ^3 P_0 \rightarrow 5s5d$ $ ^3 D_1 $ transition of strontium using laser cooled atoms

Kushal Patel, Palki Gakkhar, Korak Biswas +5 more

This article presents spectroscopy results of the $5s5p{\;^3}P_0 \rightarrow 5s5d{\;^3}D_1$ transition in all isotopes of laser cooled Sr atoms and the utility of this transition for repumping application. By employing the $5s5p{\;^{3} P_{0}} \rightarrow 5s5d{\;^3}D_1 $ (483 nm) transition in combination with the excitation of $5s5p{\;^3}P_2 \rightarrow 5s6s{\;^3}S_1$ (707 nm) transition, we observe a significant increase ( $\sim$ 13 fold) in the steady state number of atoms in the magneto-optic trap (MOT). This enhancement is attributed to the efficient repumping of Sr atoms that have decayed into the dark $5s5p{\;^3}P_2$ state by returning them to the ground state $5s^2{\;^1}S_0$ without any loss into the other states. The absolute transition frequencies were measured with an absolute accuracy of 30 MHz. To support our measurements, we performed Fock-space relativistic coupled-cluster calculations of the relevant parameters in Sr. To further increase the accuracy of the calculated properties, corrections from the Breit, QED and perturbative triples were also included. The calculated branching ratio for the repumping state confirms the significantly increased population in the ${^3}P_1$ state. Thereby, leading to an increase of population of atoms trapped due to the enhanced repumping. Our calculated hyperfine-splitting energies are in excellent agreement with the measured values. Moreover, our calculated isotope shifts in the transition frequencies are in good agreement with our measured values.This article presents spectroscopy results of the $5s5p{\;^3}P_0 \rightarrow 5s5d{\;^3}D_1$ transition in all isotopes of laser cooled Sr atoms and the utility of this transition for repumping application. By employing the $5s5p{\;^{3} P_{0}} \rightarrow 5s5d{\;^3}D_1 $ (483 nm) transition in combination with the excitation of $5s5p{\;^3}P_2 \rightarrow 5s6s{\;^3}S_1$ (707 nm) transition, we observe a significant increase ($\sim$ 13 fold) in the steady state number of atoms in the magneto-optic trap (MOT). This enhancement is attributed to the efficient repumping of Sr atoms that have decayed into the dark $5s5p{\;^3}P_2$ state by returning them to the ground state $5s^2{\;^1}S_0$ without any loss into the other states. The absolute transition frequencies were measured with an absolute accuracy of 30 MHz. To support our measurements, we performed Fock-space relativistic coupled-cluster calculations of the relevant parameters in Sr. To further increase the accuracy of the calculated properties, corrections from the Breit, QED and perturbative triples were also included. The calculated branching ratio for the repumping state confirms the significantly increased population in the ${^3}P_1$ state. Thereby, leading to an increase of population of atoms trapped due to the enhanced repumping. Our calculated hyperfine-splitting energies are in excellent agreement with the measured values. Moreover, our calculated isotope shifts in the transition frequencies are in good agreement with our measured values.

arXiv:2312.10327Dec 16, 20230 citations

We present a detailed investigation of the ultranarrow magnetic-quadrupole

^{1}\mathrm{S}_{0}\text{\ensuremath{-}}^{3}\mathrm{P}_{2}

446,647,242,704(2)

kHz in

^{88}\mathrm{Sr}

and an

^{88}\mathrm{Sr}\text{\ensuremath{-}}^{87}\mathrm{Sr}

isotope shift of

+62.91(4)

MHz. In a proof-of-principle experiment, we use this transition to demonstrate local addressing in an optical lattice with 532 nm spacing with a Rayleigh-criterion resolution of

494(45)

nm. Our results pave the way for applications of the magnetic quadrupole transition as an optical qubit and for single-site addressing in optical lattices.

{\mathrm{I}}_{2}

transitions are measured with an uncertainty of

0.5\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}

. The absolute frequency of the $^{87}\mathrm{Sr}\phantom{\rule{4pt}{0ex}}^{1}S_{0}\ensuremath{-}^{3}P_{2}$ (${\text{F}}^{\ensuremath{'}}=7/2$) transition is

446\phantom{\rule{0.16em}{0ex}}648\phantom{\rule{0.16em}{0ex}}775(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}

and limited in accuracy by the iodine reference. This work prepares the use of the Sr $^{1}S_{0}\ensuremath{-}^{3}P_{2}$ transition for quantum simulation and computation.

Spectroscopy of the

5s5p

$ ^3 P_0 \rightarrow 5s5d$ $ ^3 D_1 $ transition of strontium using laser cooled atoms

This article presents spectroscopy results of the

5s5p{\;^3}P_0 \rightarrow 5s5d{\;^3}D_1

transition in all isotopes of laser cooled Sr atoms and the utility of this transition for repumping application. By employing the $5s5p{\;^{3} P_{0}} \rightarrow 5s5d{\;^3}D_1 $ (483 nm) transition in combination with the excitation of

5s5p{\;^3}P_2 \rightarrow 5s6s{\;^3}S_1

(707 nm) transition, we observe a significant increase (

\sim

13 fold) in the steady state number of atoms in the magneto-optic trap (MOT). This enhancement is attributed to the efficient repumping of Sr atoms that have decayed into the dark

5s5p{\;^3}P_2

state by returning them to the ground state

5s^2{\;^1}S_0

without any loss into the other states. The absolute transition frequencies were measured with an absolute accuracy of 30 MHz. To support our measurements, we performed Fock-space relativistic coupled-cluster calculations of the relevant parameters in Sr. To further increase the accuracy of the calculated properties, corrections from the Breit, QED and perturbative triples were also included. The calculated branching ratio for the repumping state confirms the significantly increased population in the

{^3}P_1

state. Thereby, leading to an increase of population of atoms trapped due to the enhanced repumping. Our calculated hyperfine-splitting energies are in excellent agreement with the measured values. Moreover, our calculated isotope shifts in the transition frequencies are in good agreement with our measured values.