Aggarwal, S and Banerjee, S and Ghosh, A and Mukhopadhyay, B (2022) Non-uniform magnetic field as a booster for quantum speed limit: faster quantum information processing. In: New Journal of Physics, 24 (8).
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Abstract
We probe the quantum speed limit (QSL) of an electron when it is trapped in a non-uniform magnetic field. We show that the QSL increases to a large value, but within the regime of causality, by choosing a proper variation in magnetic fields. We also probe the dependence of QSL on spin of electron and find that it is higher for spin-down electron in the relativistic regime. This can be useful in achieving faster speed of transmission of quantum information. Further, we use the Bremermann-Bekenstein bound to find a critical magnetic field that bridges the gap between non-relativistic and relativistic treatments and relates to the stability of matter. An analytical framework is developed. We also provide a plausible experimental design to supplement our theory.
| Item Type: | Journal Article |
|---|---|
| Publication: | New Journal of Physics |
| Publisher: | Institute of Physics |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Linear equations; Magnetic fields; Quantum optics, Bremermann-bekenstein bound; Dirac's equation; Landau quantization; Magnetic-field; Nonuniform magnetic fields; Quantum information processing; Quantum speed; Relativistics; Speed limit; Spin-down electrons, Probes |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 14 Sep 2022 09:24 |
| Last Modified: | 14 Sep 2022 09:24 |
| URI: | https://eprints.iisc.ac.in/id/eprint/76444 |
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