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Decoherence of interacting Majorana modes
1Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, P. R. China.
Scientific Reports
|July 28, 2015
Summary
We investigated how environmental noise affects Majorana modes in fermion chains. Long-range interactions can surprisingly reduce decoherence, benefiting quantum information processing.
Area of Science:
- Condensed matter physics
- Quantum information science
Background:
- Majorana modes are exotic quasiparticles with potential in topological quantum computing.
- Decoherence due to environmental interactions is a major challenge for maintaining Majorana mode stability.
Purpose of the Study:
- To investigate the decoherence mechanisms of Majorana modes in a fermionic chain.
- To analyze the impact of dissipative and dephasing noise on Majorana mode coherence.
- To explore the role of long-range interactions in mitigating decoherence.
Main Methods:
- Numerical calculation of dissipation and dephasing rates.
- Analysis of low- and high-frequency noise regimes.
- Study of parity-preserving and non-parity-preserving transitions.
Main Results:
- Dissipative noise causes non-parity-preserving transitions, while dephasing noise induces parity-preserving transitions.
- Decoherence rates differ significantly between interacting and non-interacting Majorana modes.
- Long-range interactions were shown to reduce the decoherence rate in specific scenarios.
Conclusions:
- Environmental noise introduces distinct decoherence pathways for Majorana modes.
- Long-range interactions offer a promising strategy to enhance Majorana mode stability.
- Findings are beneficial for advancing quantum information processing applications.
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