Measuring the quantum state of photoelectrons
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2023
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| author | Laurell, Hugo Luo, Sizuo Weissenbilder, Robin Ammitzböll, Mattias Ahmed, Shahnawaz Söderberg, Hugo Petersson, C. Leon M. Poulain, Vénus Guo, Chen Dittel, Christoph Finkelstein-Shapiro, Daniel Squibb, Richard J. Feifel, Raimund Gisselbrecht, Mathieu Arnold, Cord L. Buchleitner, Andreas Lindroth, Eva Kockum, Anton Frisk L'Huillier, Anne Busto, David |
| author_facet | Laurell, Hugo Luo, Sizuo Weissenbilder, Robin Ammitzböll, Mattias Ahmed, Shahnawaz Söderberg, Hugo Petersson, C. Leon M. Poulain, Vénus Guo, Chen Dittel, Christoph Finkelstein-Shapiro, Daniel Squibb, Richard J. Feifel, Raimund Gisselbrecht, Mathieu Arnold, Cord L. Buchleitner, Andreas Lindroth, Eva Kockum, Anton Frisk L'Huillier, Anne Busto, David |
| contents | A photoelectron, emitted due to the absorption of light quanta as described by the photoelectric effect, is often characterized experimentally by a classical quantity, its momentum. However, since the photoelectron is a quantum object, its rigorous characterization requires the reconstruction of the complete quantum state, the photoelectron's density matrix. Here, we use quantum state tomography to fully characterize photoelectrons emitted from helium and argon atoms upon absorption of ultrashort, extreme ultraviolet light pulses. While in helium we measure a pure photoelectronic state, in argon, spin-orbit interaction induces entanglement between the ion and the photoelectron, leading to a reduced purity of the photoelectron state. Our work shows how state tomography gives new insights into the fundamental quantum aspects of light-induced electronic processes in matter, bridging the fields of photoelectron spectroscopy and quantum information, and offering new spectroscopic possibilities for quantum technology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_13945 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Measuring the quantum state of photoelectrons Laurell, Hugo Luo, Sizuo Weissenbilder, Robin Ammitzböll, Mattias Ahmed, Shahnawaz Söderberg, Hugo Petersson, C. Leon M. Poulain, Vénus Guo, Chen Dittel, Christoph Finkelstein-Shapiro, Daniel Squibb, Richard J. Feifel, Raimund Gisselbrecht, Mathieu Arnold, Cord L. Buchleitner, Andreas Lindroth, Eva Kockum, Anton Frisk L'Huillier, Anne Busto, David Quantum Physics A photoelectron, emitted due to the absorption of light quanta as described by the photoelectric effect, is often characterized experimentally by a classical quantity, its momentum. However, since the photoelectron is a quantum object, its rigorous characterization requires the reconstruction of the complete quantum state, the photoelectron's density matrix. Here, we use quantum state tomography to fully characterize photoelectrons emitted from helium and argon atoms upon absorption of ultrashort, extreme ultraviolet light pulses. While in helium we measure a pure photoelectronic state, in argon, spin-orbit interaction induces entanglement between the ion and the photoelectron, leading to a reduced purity of the photoelectron state. Our work shows how state tomography gives new insights into the fundamental quantum aspects of light-induced electronic processes in matter, bridging the fields of photoelectron spectroscopy and quantum information, and offering new spectroscopic possibilities for quantum technology. |
| title | Measuring the quantum state of photoelectrons |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2309.13945 |