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Quantum correlation dynamics subjected to critical spin environment with short-range anisotropic interaction
1College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China.
Scientific Reports
|September 7, 2016
Summary
Short-range spin interactions reveal quantum phase transitions through correlation decay. Optimal control of anisotropic interactions enhances quantum correlation robustness against magnetic fields.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Computing
Background:
- Short-range spin interactions are crucial for complex quantum phenomena.
- Understanding quantum correlation dynamics is vital for quantum technologies.
Purpose of the Study:
- Investigate quantum correlation in systems with short-range anisotropic interactions.
- Analyze the role of these interactions in quantum phase transitions and decoherence.
Main Methods:
- Studied pairwise entanglement and quantum discord of central spins.
- Examined the decoherence factor near phase transition points.
- Analyzed effects of magnetic fields and anisotropic interaction strength.
Main Results:
- Decay of quantum correlation serves as a signature for quantum phase transitions.
- Decoherence factor exhibits Gaussian decay in the strong coupling regime.
- Quantum correlation shows robustness against magnetic fields in the weak coupling limit.
Conclusions:
- Short-range anisotropic interactions significantly influence quantum correlation and decoherence.
- Findings offer insights into controlling quantum states for quantum computing and information.
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