Experimental Control of Quantum-Mechanical Entanglement in an Attosecond Pump-Probe Experiment

Koll, Lisa-Marie; Maikowski, Laura; Drescher, Lorenz; Witting, Tobias; Vrakking, Marc J. J.

doi:10.1103/physrevlett.128.043201

Cited by 51 publications

(38 citation statements)

References 31 publications

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“…While we here demonstrated that KRAKEN can be used to study entanglement properties between ion and photoelectron due to spin-orbit interactions, it can likewise be used to investigate other bipartite entanglement processes, e.g. regarding electron-ion entanglement in vibrating molecules [14,28]. This opens up new routes for uncovering the role of entanglement in atomic and molecular physics [29].…”

mentioning

confidence: 69%

Continuous variable quantum state tomography of photoelectrons

Laurell¹,

Finkelstein-Shapiro²,

Dittel³

et al. 2022

Preprint

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mentioning

confidence: 69%

Continuous variable quantum state tomography of photoelectrons

Laurell¹,

Finkelstein-Shapiro²,

Dittel³

et al. 2022

Preprint

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“…Considering that HHG from more complex materials such as solids or plasma [56][57][58][59][60], strongly correlated [61], or topological systems [62][63][64][65][66] follows very similar mechanism anticipates for further investigation of the non-classical properties from the interaction with such materials. In particular, entanglement in strong field driven processes, for instance, between the ion and ionized electron [67], or in two-electron ionization [68] are of current interest. The connection to quantum information science will ultimately help to answer the question of the quantum mechanical properties in intense laser matter interaction from atoms to complex materials, and how new quantum states of light with the use for modern quantum technologies can be generated.…”

Section: Discussionmentioning

confidence: 99%

Theory of entanglement and measurement in high harmonic generation

Stammer¹

2022

Preprint

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Quantum information science and intense laser matter interaction are two apparently unrelated fields. However, the recent developments of the quantum optical description of the intense laser driven process of high harmonic generation allow to conceive new light engineering protocols. Here, we introduce the notion of quantum information theory to intense laser driven processes by providing the quantum mechanical description of measurement protocols for high harmonic generation in atoms. We explicitly evaluate conditioning experiments on individual optical field modes, and provide the corresponding quantum operation for coherent states. The associated positive operatorvalued measures are obtained, and give rise to the quantum theory of measurement for the generation of high dimensional entangled states, and coherent state superposition with controllable non-classical features on the attosecond timescale.

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“…Nonetheless, experimentally quantifying decoherence is a difficult task, often overlooked in attosecond photoionization experiments since coupling to the outside environment usually happens on a timescale much longer than that of the photoionization process. Recently, Koll et al experimentally observed signatures of decoherence due to electron-ion entanglement in H 2 [31] and Bourassin-Bouchet et al measured the quantum state of photoelectrons emitted following the absorption of an attosecond pulse train, demonstrating the impact of experimental fluctuations and limited spectral resolution on the photoelectron coherence [32,33].…”

Section: Supplementary Informationmentioning

confidence: 99%

Probing electronic decoherence with high-resolution attosecond photoelectron interferometry

et al. 2022

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Quantum coherence plays a fundamental role in the study and control of ultrafast dynamics in matter. In the case of photoionization, entanglement of the photoelectron with the ion is a well-known source of decoherence when only one of the particles is measured. Here, we investigate decoherence due to entanglement of the radial and angular degrees of freedom of the photoelectron. We study two-photon ionization via the 2s2p autoionizing state in He using high spectral resolution photoelectron interferometry. Combining experiment and theory, we show that the strong dipole coupling of the 2s2p and 2p$$^2$$ 2 states results in the entanglement of the angular and radial degrees of freedom. This translates, in angle-integrated measurements, into a dynamic loss of coherence during autoionization. Graphic Abstract

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Experimental Control of Quantum-Mechanical Entanglement in an Attosecond Pump-Probe Experiment

Cited by 51 publications

References 31 publications

Continuous variable quantum state tomography of photoelectrons

Continuous variable quantum state tomography of photoelectrons

Theory of entanglement and measurement in high harmonic generation

Probing electronic decoherence with high-resolution attosecond photoelectron interferometry

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