Universal Counterdiabatic Driving
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909881259261952 |
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| author | Morawetz, Stewart Polkovnikov, Anatoli |
| author_facet | Morawetz, Stewart Polkovnikov, Anatoli |
| contents | Local counterdiabatic (CD) driving provides a systematic way of constructing a control protocol to approximately suppress the excitations resulting from changing some parameter(s) of a quantum system at a finite rate. However, designing CD protocols typically requires knowledge of the original Hamiltonian a priori. In this work, we design local CD driving protocols in Krylov space using only the characteristic local time scales of the system set by e.g. phonon frequencies in materials or Rabi frequencies in superconducting qubit arrays. Surprisingly, we find that convergence of these universal protocols is controlled by the asymptotic high frequency tails of the response functions. This finding hints at a deep connection between the long-time, low frequency response of the system controlling non-adiabatic effects, and the high-frequency response determined by the short-time operator growth and the Krylov complexity, which has been elusive until now. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_01952 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal Counterdiabatic Driving Morawetz, Stewart Polkovnikov, Anatoli Quantum Physics Statistical Mechanics Local counterdiabatic (CD) driving provides a systematic way of constructing a control protocol to approximately suppress the excitations resulting from changing some parameter(s) of a quantum system at a finite rate. However, designing CD protocols typically requires knowledge of the original Hamiltonian a priori. In this work, we design local CD driving protocols in Krylov space using only the characteristic local time scales of the system set by e.g. phonon frequencies in materials or Rabi frequencies in superconducting qubit arrays. Surprisingly, we find that convergence of these universal protocols is controlled by the asymptotic high frequency tails of the response functions. This finding hints at a deep connection between the long-time, low frequency response of the system controlling non-adiabatic effects, and the high-frequency response determined by the short-time operator growth and the Krylov complexity, which has been elusive until now. |
| title | Universal Counterdiabatic Driving |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2503.01952 |