Fast generation of cat states in Kerr nonlinear resonators via optimal adiabatic control. (1st May 2022)

• Record Type: Journal Article
• Authors: Xue, Jiao-Jiao; Yu, Ke-Hui; Liu, Wen-Xiao; Wang, Xin; Li, Hong-Rong
• Is Part Of: New journal of physics. Volume 24:Number 5(2022)
• Publication Date: 2022-05-01
• Subjects: optimal adiabatic control -- cat states -- Kerr nonlinear resonators -- quantum information processing; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ac6765
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Macroscopic cat states have been widely studied to illustrate fundamental principles of quantum physics as well as their applications in quantum information processing. In this paper, we propose a quantum speed-up method for the creation of cat states in a Kerr nonlinear resonator (KNR) via optimal adiabatic control. By simultaneously adiabatic tuning the cavity-field detuning and driving field strength, the width of the minimum energy gap between the target trajectory and non-adiabatic trajectory can be widened, which allows us to accelerate the evolution along the adiabatic path. Compared with the previous proposal, preparing cat states only by controlling two-photon pumping strength, our method can prepare the target state with a shorter time, a high-fidelity and a large non-classical volume. It is worth noting that the cat state prepared here is also robust against single-photon loss. Moreover, when we consider the KNR with a large initial detuning, our proposal will create a large-size cat state successfully. This proposal for preparing cat states can be implemented in superconducting quantum circuits, which provides a quantum state resource for quantum information encoding and fault-tolerant quantum computing.