Manipulating the singlet–triplet transition in ion strings by nonresonant dynamic Stark effect

Vindel-Zandbergen, Patricia; Falge, Mirjam; Chang, Bong‐Soon; Engel, Volker; Solá, Ignacio R.

doi:10.1007/s00214-013-1359-3

Cited by 4 publications

(10 citation statements)

References 48 publications

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“…Refs. [14][15][16][17][18][19][20][21]. The perturbed singlet-triplet states, arising from the level mixing due to the spin-orbit coupling, represent a gateway to gain access to the otherwise dark triplet states in these systems.…”

Section: Introductionmentioning

confidence: 99%

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High-fidelity quantum control via Autler-Townes splitting

Delvecchio

Kirova²,

Arimondo³

et al. 2022

Phys. Rev. A

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We propose quantum control protocols for the high-fidelity preparation of target-states in systems with Autler-Townes splitting. We investigate an approximated three-level system obtained from a four-level one by adiabatically eliminating a state that does not participate in the evolution. In our work we use linear, arctan and Roland-Cerf functions for transferring population between two eigenstates of the system obtaining a high fidelity for long evolution times. Additionally, in order to overcome the restriction given by the lifetimes of the experimental setup, we propose an accelerated adiabatic evolution with a shortcut to adiabaticity protocol, which allows us to reach fidelities close to one but much faster.

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Section: Introductionmentioning

confidence: 99%

“…In most cases, for instance, in ion strings [19,20], the Autler-Townes manipulation of the singlet-triplet transition is produced by properly shaped short laser pulses. These pulses decouple the singlet and triplet electronic states, as well as minimize absorption to excited singlets and ionization of the absorbing species.…”

Section: Introductionmentioning

confidence: 99%

High-fidelity quantum control via Autler-Townes splitting

Delvecchio

Kirova²,

Arimondo³

et al. 2022

Phys. Rev. A

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“…Using strong, nonresonant laser pulses (for example, within the near-infrared or THz regime), molecular potentials can be distorted without absorbing the light, making use of the so-called dynamic or AC Stark control effect . In the last years strong fields have become an important issue in ultrafast science, , and the dynamics of a number of molecular systems have been manipulated making use of fields strong enough to modify the potential energy surfaces − while at the same time weak enough to not produce undesired ionization.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Excited-State Dynamics of Nuclear Spin Isomers Using the Dynamic Stark Effect

2016

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Stark control of chemical reactions uses intense laser pulses to distort the potential energy surfaces of a molecule, thus opening new chemical pathways. We use the concept of Stark shifts to convert a local minimum into a local maximum of the potential energy surface, triggering constructive and destructive wave-packet interferences, which then induce different dynamics on nuclear spin isomers in the electronically excited state of a quinodimethane derivative. Model quantum-dynamical simulations on reduced dimensionality using optimized ultrashort laser pulses demonstrate a difference of the excited-state dynamics of two sets of nuclear spin isomers, which ultimately can be used to discriminate between these isomers.

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“…In our former work [47,48], we tuned the parameters of the ESM Hamiltonian to force spin switching from the ground electronic singlet state to a degenerate electronic triplet state in 120 fs. We then showed that it is possible to control the spin transition, locking the spin populations, while at the same time minimizing multi-photon absorption [48].…”

Section: Introductionmentioning

confidence: 99%

The time-scale of nonlinear events driven by strong fields: can one control the spin coupling before ionization runs over?

Falge

Vindel-Zandbergen

Engel

et al. 2014

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

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An initially populated spin state of an ion chain interacting with an external field can decay via spin coupling or via ionization. Using a simple two-level Hamiltonian we investigate the relation between spin-coupling and ionization rate and identify conditions for an efficient spin-control via a non-resonant Stark effect by suppressing ionization. The results are confirmed in solving the time-dependent Schrödinger equation for the interaction of a laser field with a spin-coupled model system where two electrons and a nucleus move in a collinear configuration. It is thus shown, that quantum control of intersystem crossing can indeed be effective if the intensity of the external field and the accompanying Stark-shift is adjusted properly to the spin-coupling strength.

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Manipulating the singlet–triplet transition in ion strings by nonresonant dynamic Stark effect

Cited by 4 publications

References 48 publications

High-fidelity quantum control via Autler-Townes splitting

High-fidelity quantum control via Autler-Townes splitting

Controlling the Excited-State Dynamics of Nuclear Spin Isomers Using the Dynamic Stark Effect

The time-scale of nonlinear events driven by strong fields: can one control the spin coupling before ionization runs over?

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