Many-body interferometry with semiconductor spins
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911592681046016 |
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| author | Jirovec, Daniel Reale, Stefano Cova-Fariña, Pablo Ventura-Meinersen, Christian Nguyen, Minh T. P. Zhang, Xin Oosterhout, Stefan D. Scappucci, Giordano Veldhorst, Menno Rimbach-Russ, Maximilian Bosco, Stefano Vandersypen, Lieven M. K. |
| author_facet | Jirovec, Daniel Reale, Stefano Cova-Fariña, Pablo Ventura-Meinersen, Christian Nguyen, Minh T. P. Zhang, Xin Oosterhout, Stefan D. Scappucci, Giordano Veldhorst, Menno Rimbach-Russ, Maximilian Bosco, Stefano Vandersypen, Lieven M. K. |
| contents | Quantum simulators enable studies of many-body phenomena which are intractable with classical hardware. Spins in devices based on semiconductor quantum dots promise precise electrical control and scalability advantages, but accessing many-body phenomena has so far been restricted by challenges in nanofabrication and simultaneous control of multiple interactions. Here, we perform spectroscopy of up to eight interacting spins using a 2x4 array of gate-defined germanium quantum dots. The spectroscopy protocol is based on Ramsey interferometry and adiabatic mapping of many-body eigenstates to single-spin eigenstates, enabling a complete energy spectrum reconstruction. As the interaction strength exceeds magnetic disorder, we observe signatures of the crossover from localization to a chaotic phase marking a step towards the observation of many-body phenomena in quantum dot systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_04310 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Many-body interferometry with semiconductor spins Jirovec, Daniel Reale, Stefano Cova-Fariña, Pablo Ventura-Meinersen, Christian Nguyen, Minh T. P. Zhang, Xin Oosterhout, Stefan D. Scappucci, Giordano Veldhorst, Menno Rimbach-Russ, Maximilian Bosco, Stefano Vandersypen, Lieven M. K. Mesoscale and Nanoscale Physics Quantum simulators enable studies of many-body phenomena which are intractable with classical hardware. Spins in devices based on semiconductor quantum dots promise precise electrical control and scalability advantages, but accessing many-body phenomena has so far been restricted by challenges in nanofabrication and simultaneous control of multiple interactions. Here, we perform spectroscopy of up to eight interacting spins using a 2x4 array of gate-defined germanium quantum dots. The spectroscopy protocol is based on Ramsey interferometry and adiabatic mapping of many-body eigenstates to single-spin eigenstates, enabling a complete energy spectrum reconstruction. As the interaction strength exceeds magnetic disorder, we observe signatures of the crossover from localization to a chaotic phase marking a step towards the observation of many-body phenomena in quantum dot systems. |
| title | Many-body interferometry with semiconductor spins |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.04310 |