Quantum scrambling with classical shadows
Quantum dynamics is of fundamental interest and has implications in quantum information processing. The four-point out-of-time-ordered correlator (OTOC) is traditionally used to quantify quantum information scrambling under many-body dynamics. Due to the OTOC's unusual time ordering, its mea...
| Principais autores: | , , |
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| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2022
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| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/159360 |
| Resumo: | Quantum dynamics is of fundamental interest and has implications in quantum
information processing. The four-point out-of-time-ordered correlator (OTOC) is
traditionally used to quantify quantum information scrambling under many-body
dynamics. Due to the OTOC's unusual time ordering, its measurement is
challenging. We propose higher-point OTOCs to reveal early-time scrambling
behavior, and present protocols to measure any higher-point OTOC using the
shadow estimation method. The protocols circumvent the need for time-reversal
evolution and ancillary control. They can be implemented in near-term quantum
devices with single-qubit readout. |
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