Majorana noise model and its influence on the power spectrum  

作　　者：陈书梦 丁思凡 张振涛 刘东 Shumeng Chen;Sifan Ding;Zhen-Tao Zhang;Dong E.Liu(State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China;School of Physics Science and Information Technology,Shandong Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252059,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Frontier Science Center for Quantum Information,Beijing 100084,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[1]State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China [2]School of Physics Science and Information Technology,Shandong Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252059,China [3]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [4]Frontier Science Center for Quantum Information,Beijing 100084,China [5]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics B》2024年第1期637-646,共10页中国物理B（英文版）

基　　金：supported by the Innovation Program for Quantum Science and Technology (Grant No.2021ZD0302400);the National Natural Science Foundation of China (Grants No.11974198);the Natural Science Foundation of Shandong Province of China (Grant No.ZR2021MA091)。

摘　　要：Majorana quantum computation offers a potential approach to securely manipulating and storing quantum data in a topological manner that may effectively resist the decoherence induced by local noise. However, actual Majorana qubit setups are susceptible to noise. In this study, from a quantum dynamics perspective, we develop a noise model for Majorana qubits that accounts for quasi-particle poisoning and Majorana overlapping with fluctuation. Furthermore, we focus on Majorana parity readout methodologies, specifically those leveraging an ancillary quantum dot, and carry out an indepth exploration of continuous measurement techniques founded on the quantum jump model of a quantum point contact.Utilizing these methodologies, we proceed to analyze the influence of noise on the afore-mentioned noise model, employing numerical computation to evaluate the power spectrum and frequency curve. In the culmination of our study, we put forward a strategy to benchmark the presence and detailed properties of noise in Majorana qubits.

关 键 词：Majorana zero mode topological quantum computation topological devices decoherence and noise in qubits 

分 类 号：O413[理学—理论物理]