Quantum speed limit times of qubit systems in time-dependent potentials

Authors

  • Kent John L. Duga ⋅ PH National Institute of Physics, University of the Philippines Diliman
  • Eric A. Galapon ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Quantum speed limits (QSLs) fundamentally bound the evolution times of quantum processes. Most of the Hamiltonians involved in finding QSLs are time-independent; thus, this paper explored the use of time-dependent perturbing potentials. An electron in a two-state system is subjected to a rotating magnetic field, from which, QSLs involving the fastest time when the system is most probably in the state orthogonal from the initial state was obtained. It was shown that when the rotating magnetic field is tuned to resonate with the system's time-independent Hamiltonian, the system gains an orthogonalization time. QSLs obtained from this potential also has the form that are seemingly fundamental in nature. QSLs of the same form could also generate time-energy uncertainty relations.

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Issue

Article ID

SPP-2023-PB-25

Section

Poster Session B (Complex Systems, Simulations, and Theoretical Physics)

Published

2023-07-09

How to Cite

[1]
KJL Duga and EA Galapon, Quantum speed limit times of qubit systems in time-dependent potentials, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-PB-25 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-PB-25.