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

• URL: http://arxiv.org/abs/2109.12458v1
• Date: Sat, 25 Sep 2021 23:35:42 GMT
• Title: Acceleration and deceleration of quantum dynamics based on inter-trajectory travel with fast-forward scaling theory
• Authors: Shumpei Masuda, Jacob Koenig, Gary A. Steele
• Abstract summary: We propose a method to accelerate quantum dynamics and obtain a target state in a shorter time relative to unmodified dynamics. We extend the technique to accelerate quantum adiabatic evolution in order to rapidly generate a desired target state.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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