Coupled internal-state and center-of-mass dynamics of Rydberg atoms in a magnetic guide

Traxler, Mallory; Sapiro, Rachel; Lundquist, Karl; Power, E.; Raithel, Georg

doi:10.1103/physreva.87.053418

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…3(d), vary between 21 × 10 3 s −1 for m = 3 and 13 × 10 3 s −1 for m = 0. In comparison, for the rates of black-bodyradiation-induced bound-bound (Bbb) transitions and black-body photoionization (Bpi) [42,43] we calculate Γ Bbb,50F = 10.60×10 3 s −1 and Γ Bpi,50F = 0.77×10 3 s −1 , respectively, for a radiation temperature of 300 K and for all m . The lattice-induced PI should therefore be dominant over black-body-induced transitions.…”

Section: B An Implementation Of a Weak Optical Latticementioning

confidence: 99%

Photoionization of Rydberg Atoms in Optical Lattices

Cardman,

MacLennan,

Anderson

et al. 2021

Preprint

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We develop a formalism for photoionization (PI) and potential energy curves (PECs) of Rydberg atoms in ponderomotive optical lattices and apply it to examples covering several regimes of the optical-lattice depth. The effect of lattice-induced PI on Rydberg-atom lifetime ranges from noticeable to highly dominant when compared with natural decay. The PI behavior is governed by the generally rapid decrease of the PI cross sections as a function of angular-momentum ( ), and by lattice-induced -mixing across the optical-lattice PECs. In GHz-deep lattices, -mixing leads to a rich PEC structure, and the significant low-PI cross sections are distributed over many latticemixed Rydberg states. In lattices less than several tens-of-MHz deep, atoms on low-PECs are essentially -mixing-free and maintain large PI cross sections, while atoms on high-PECs trend towards being PI-free. Characterization of PI in GHz-deep Rydberg-atom lattices may be beneficial for optical control and quantum-state manipulation of Rydberg atoms, while data on PI in shallower lattices are potentially useful in high-precision spectroscopy and quantum-computing applications of lattice-confined Rydberg atoms.

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Section: B An Implementation Of a Weak Optical Latticementioning

confidence: 99%

Photoionization of Rydberg Atoms in Optical Lattices

Cardman,

MacLennan,

Anderson

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The excitation of alkali atoms to Rydberg states is routinely achieved in present day experiments [1][2][3][4][5][6][7][8][9][10][11]. The standard technique is a resonant two-photon transition from a ground state |g to the desired Rydberg state |r via an intermediate state.…”

Section: Introductionmentioning

confidence: 99%

Dipole–dipole induced global motion of Rydberg-dressed atom clouds

Genkin

Wüster

Möbius

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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We consider two clouds of ground state alkali atoms in two distinct hyperfine ground states. Each level is far off-resonantly coupled to a Rydberg state, which leads to dressed ground states with a weak admixture of the Rydberg state properties. Due to this admixture, for a proper choice of the Rydberg states, the atoms experience resonant dipole-dipole interactions that induce mechanical forces acting on all atoms within both clouds. This behavior is in contrast to the dynamics predicted for bare dipole-dipole interactions between Rydberg superatoms, where only a single atom per cloud is subject to dipole-dipole induced motion [Phys. Rev. A 88 012716 (2013)]. Submitted to: J. Phys. B: At. Mol. Phys. PACS numbers: 32.80.Ee, 34.20.Cf interactions, in particular resonant dipole-dipole interactions [29][30][31] and van-der-Waals interactions. While both stem fundamentally from dipole-dipole interactions, vander-Waals interactions arise through off-resonant coupling to nearby quantum states. This approximately results in an interaction termV vdW ∼ 1/r 6 | ν, l; ν ′ , l ′ ν, l; ν ′ , l ′ | for a pair of atoms in Rydberg states with given principal quantum number ν, ν ′ and angular quantum numbers l, l ′ separated by a distance r. Importantly, this term is diagonal in the electronic state. Resonant dipole-dipole interactions,V dd ∼ 1/r 3 | ν, l; ν ′ , l ′ ν ′ , l ′ , ν, l | for |l − l ′ | = 1, on the other hand, give rise to electronic state transfer [32][33][34]. Both of these interactions can induce atomic motion, but only resonant dipole-dipole interactions link it intimately with quantum state transport [32,33]. Then the character of motion depends on the overall system eigenstate, called exciton, which depends non-trivially on all atom positions.In the present work, we study the effect of a partial blockade due to van-der-Waals interaction [35-37] on dressed resonant dipole-dipole interactions [38]. Specifically, we consider two atom clouds with radius smaller than the van-der-Waals blockade radius, hence each cloud is in a full blockade regime. The distance between the clouds is larger than the blockade radius, and therefore simultaneous Rydberg excitation of one atom from each cloud is possible. The Rydberg states are chosen such that the excited atoms are subject to resonant dipole-dipole interactions, which dominate at these larger distances. In an earlier article [39], we have considered the same scenario without dressing. As demonstrated therein, the dipole-dipole interactions set a single atom pair in motion (one atom from each cloud), so that the initially delocalized Rydberg excitation is in the end localized on the ejected atom. The ground state atoms do not move and remain behind.We show that the dynamics is quite different if the blockaded clouds are weakly Rydberg-dressed rather than excited into a blockade state. Instead of ejecting a single atom, the clouds may move as a whole. Whether this occurs and whether motion is attractive or repulsive depends on the systems exciton state, as in the case of b...

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Photoionization of Rydberg atoms in optical lattices

et al. 2021

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We develop a formalism for photoionization (PI) and potential energy curves (PECs) of Rydberg atoms in ponderomotive optical lattices and apply it to examples covering several regimes of the optical-lattice depth. The effect of lattice-induced PI on Rydberg-atom lifetime ranges from noticeable to highly dominant when compared with natural decay. The PI behavior is governed by the generally rapid decrease of the PI cross sections as a function of angular-momentum (ℓ), lattice-induced ℓ-mixing across the optical-lattice PECs, and interference of PI transition amplitudes from the lattice-mixed into free-electron states. In GHz-deep lattices, ℓ-mixing leads to a rich PEC structure, and the significant low-ℓ PI cross sections are distributed over many lattice-mixed Rydberg states. In lattices less than several tens-of-MHz deep, atoms on low-ℓ PECs are essentially ℓ-mixing-free and maintain large PI rates, while atoms on high-ℓ PECs trend towards being PI-free. Characterization of PI in GHz-deep Rydberg-atom lattices may be beneficial for optical control and quantum-state manipulation of Rydberg atoms, while data on PI in shallower lattices are potentially useful in high-precision spectroscopy and quantum-computing applications of lattice-confined Rydberg atoms.

show abstract

Coupled internal-state and center-of-mass dynamics of Rydberg atoms in a magnetic guide

Cited by 4 publications

References 39 publications

Photoionization of Rydberg Atoms in Optical Lattices

Photoionization of Rydberg Atoms in Optical Lattices

Dipole–dipole induced global motion of Rydberg-dressed atom clouds

Photoionization of Rydberg atoms in optical lattices

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