Acceleration and deceleration of quantum dynamics based on inter-trajectory travel with fast-forward scaling theory

• Published in: Scientific reports Vol. 12; no. 1; p. 10744
• Main Authors: Masuda, Shumpei, Koenig, Jacob, Steele, Gary A.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 24-06-2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/766/483; 639/766/483/1139; 639/766/483/2802; 639/766/483/640; Adiabatic; Humanities and Social Sciences; Information processing; multidisciplinary; Quantum theory; Science; Science (multidisciplinary)
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-14973-6

Quantum information processing requires fast manipulations of quantum systems in order to overcome dissipative effects. We propose a method to accelerate quantum dynamics and obtain a target state in a shorter time relative to unmodified dynamics, and apply the theory to a system consisting of two linearly coupled qubits. We extend the technique to accelerate quantum adiabatic evolution in order to rapidly generate a desired target state, thereby realizing a shortcut to adiabaticity. Further, we address experimental limitations to the rate of change of control parameters for quantum devices which often limit one’s ability to generate a desired target state with high fidelity. We show that an initial state following decelerated dynamics can reach a target state while varying control parameters more slowly, enabling more experimentally feasible driving schemes.