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Analysis of Quantum Correlations Obtained Using Local Optimal Universal Asymmetric Cloners
Cătălina Cîrneci1, Iulia Ghiu1,2
1Faculty of Physics, University of Bucharest, 405 Str. Atomistilor, 077125 Magurele, Romania.
Entropy (Basel, Switzerland)
|January 21, 2023
Summary
Researchers explored quantum correlations in cloned entangled states. They found that consonance, a measure of quantum correlation, is greater than quantum discord, which is greater than concurrence.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Quantum Entanglement
Background:
- Quantum cloning is a fundamental process in quantum information.
- Entangled states are crucial resources for quantum information processing.
- Understanding quantum correlations is key to harnessing quantum phenomena.
Purpose of the Study:
- To investigate quantum correlations in states produced by asymmetric quantum cloning.
- To compare different measures of quantum correlation: concurrence, quantum discord, and consonance.
- To analyze the behavior of these correlations under asymmetric cloning.
Main Methods:
- Application of the local optimal universal asymmetric cloning machine.
- Generation of two-qubit entangled states.
- Analysis of quantum correlations using concurrence, quantum discord, and consonance.
Main Results:
- The asymmetric cloning process generates output states with quantum correlations.
- Consonance was found to be the highest measure of quantum correlation in the output states.
- Quantum discord was observed to be greater than concurrence.
Conclusions:
- Asymmetric quantum cloning preserves and transforms quantum correlations.
- Consonance emerges as a more sensitive measure of quantum correlation in this context.
- The study provides insights into the dynamics of quantum correlations during cloning.
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