Volume 116, Number 6, December 2016
|Number of page(s)||6|
|Published online||16 February 2017|
High-fidelity superadiabatic population transfer of a two-level system with a linearly chirped Gaussian pulse
1 Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics Beijing 100088, China
2 College of Physics and Electronic Engineering, Northwest Normal University - Lanzhou 730070, China
3 HEDPS, CAPT, and CICIFSA MoE, Peking University - Beijing 100871, China
Received: 11 December 2016
Accepted: 23 January 2017
We investigate high-fidelity superadiabatic quantum driving in a chirped Gaussian two-level model with a Gaussian temporal envelope and a linear detuning. We show that the nonadiabatic losses can be canceled to any desired order by constructing and adjusting an auxiliary Hamiltonian (counter-diabatic field) and a symmetry in the fidelity arises on the counter-diabatic field ratio. A high-fidelity, robust, and accelerated (in a shorter time) transitionless superadiabatic population transfer is achieved that ensures a perfect following of the instantaneous adiabatic ground state even in the nonadiabatic regime. The features make the superadiabatic protocol a potentially important tool for quantum information.
PACS: 03.65.Xp – Tunneling, traversal time, quantum Zeno dynamics / 32.80.Qk – Coherent control of atomic interactions with photons / 42.50.Dv – Quantum state engineering and measurements
© EPLA, 2016
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