检索结果-南通市图书馆

Majorana noise model and its influence on the power spectrum

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第1期33卷 637-646页

作者：陈书梦丁思凡张振涛刘东 State Key Laboratory of Low Dimensional quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252059China Beijing Academy of quantum Information Sciences Beijing 100193China Frontier Science Center for quantum Information Beijing 100084China Hefei National Laboratory Hefei 230088China

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 *** 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

Recent progress on non-Abelian anyons:from Majorana zero modes to topological Dirac fermionic modes

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 36-52页

作者： Yijia Wu Jie Liu XinCheng Xie Institute for Nanoelectronic Devices and quantum Computing Fudan UniversityShanghai 200438China School of Physics MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed MatterXi’an Jiaotong UniversityXi’an 710049China International Center for quantum Materials School of PhysicsPeking UniversityBeijing 100871China Hefei National Laboratory Hefei 230088China

Majorana zero modes(MZMs)have been intensively studied in recent decades theoretically and experimentally as the most promising candidate for non-Abelian anyons supporting topological quantum computation(TQC).In addition to the Majorana scheme,some non-Majorana quasiparticles obeying non-Abelian statistics,including topological Dirac fermionic modes,have also been proposed and therefore become new candidates for *** this review,we overview the non-Abelian braiding properties as well as the corresponding braiding schemes for both the MZMs and the topological Dirac fermionic modes,emphasizing the recent progress on topological Dirac fermionic modes.A topological Dirac fermionic mode can be regarded as a pair of MZMs related by unitary symmetry,which can be realized in a number of platforms,including the one-dimensional topological insulator,higher-order topological insulator,and spin *** topological Dirac fermionic mode possesses several advantages compared with its Majorana cousin,such as superconductivity-free and larger ***,it provides a new avenue for investigating non-Abelian physics and possible TQC.

关键词： non-Abelian anyon topological quantum computation topological Dirac fermionic mode Majorana zero mode

Recent progress on Majorana in semiconductor-superconductor heterostructures—engineering and detection

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 18-35页

作者： Zhan Cao Shumeng Chen Gu Zhang Dong E.Liu Beijing Academy of quantum Information Sciences Beijing 100193China State Key Laboratory of Low Dimensional quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Frontier Science Center for quantum Information Beijing 100084China Hefei National Laboratory Hefei 230088China

Majorana zero modes(MZMs)are exotic excitations(in condensed matter systems)of fundamental scientific interest and hold great promise as the basis of fault-tolerant topological quantum *** MZMs have been predicted in many platforms,their existence is still under *** this paper,we review the recent progress in engineering and detecting MZMs in semiconductor-superconductor *** also briefiy review the protocols for implementing topological quantum computation by hybrid semiconductor-superconductor nanowires.

关键词： topological superconductor Majorana zero mode semiconductor-superconductor heterostructure quantum transport topological quantum computation

Phase Transitions Governed by the Fifth Power of the Golden Mean and Beyond

在线全文

学校读者我要写书评

暂无评论

World Journal of Condensed Matter Physics 2020年第3期10卷 135-158页

作者： Hans Hermann Otto Materials Science and Crystallography Clausthal University of Technology Clausthal-Zellerfeld Lower Saxony Germany

In this contribution results from different disciplines of science were compared to show their intimate interweaving with each other having in common the golden ratio φ respectively its fifth power φ5. The research fields cover model calculations of statistical physics associated with phase transitions, the quantum probability of two particles, new physics of everything suggested by the information relativity theory (IRT) including explanations of cosmological relevance, the ε-infinity theory, superconductivity, and the Tammes problem of the largest diameter of N non-overlapping circles on the surface of a sphere with its connection to viral morphology and crystallography. Finally, Fibonacci anyons proposed for topological quantum computation (TQC) were briefly described in comparison to the recently formulated reverse Fibonacci approach using the