| 1. |
- Boström, E. Viñas, et al.
(author)
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Time-Stretched Spectroscopy by the Quantum Zeno Effect : The Case of Auger Decay
- 2018
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In: Physical Review Letters. - 0031-9007. ; 121:23
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Journal article (peer-reviewed)abstract
- A tenet of time-resolved spectroscopy is "faster laser pulses for shorter timescales". Here, we suggest turning this paradigm around, and slowing down the system dynamics via repeated measurements, to do spectroscopy on longer timescales. This is the principle of the quantum Zeno effect. We exemplify our approach with the Auger process, and find that repeated measurements increase the core-hole lifetime, redistribute the kinetic energy of Auger electrons, and alter entanglement formation. We further provide an explicit experimental protocol for atomic Li, to make our proposal concrete.
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| 2. |
- Moskalenko, Evgenii, et al.
(author)
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Single InAs/GaAs quantum dot spectroscopy in a lateral electric field
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Other publication (other academic/artistic)abstract
- We report on the comprehensive study of InAs/GaAs single quantum dots subjected to a lateral external electric field by means of micro-photoluminescence (μ-PL) technique. The results obtained on the exciton in the μ-PL spectra of a single dot demonstrate a considerable PL intensity enhancement (up to a factor of 4) of the dot as well as a redistribution of the excitonic lines when an electric field is applied. The latter fact exhibits an effective charge reconfiguration of the dot from a purely negatively charged to a neutral state. The model proposed to explain the charge redistribution is based on an effective hole localization at the potential fluctuations of the wetting layer at low temperature and bias.
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| 3. |
- Andersen, J. N., et al.
(author)
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Strong phonon replicas in Be 1s photoemission spectra
- 2001
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 86:19, s. 4398-4401
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Journal article (peer-reviewed)abstract
- Strong phonon replicas in Be 1s photoemission spectra were investigated. The fine structure caused by intrinsic excitation of a narrow band of optical phonons was discussed in the 1s photoemission proces. The excitations of the optical Be phonons in the photoemission process caused fine structures. It was found that the phonon replicas in Be metal were strong due to large size misfit between neutral and core-ionized Be.
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