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Coherence fraction
S KARMAKAR, A SEN, , A BHAR,
Published in Springer New York LLC
2019
Volume: 18
   
Issue: 9
Abstract
The concept of entanglement fraction is generalized to define coherence fraction of a quantum state. Precisely, it quantifies the proximity of a quantum state to maximally coherent state and it can be used as a measure of coherence. Coherence fraction has a connection with l1-norm coherence and provides the criteria of coherence distillability. Optimal coherence fraction corresponding to a channel, defined from this new idea of coherence fraction, obeys a complementary relation with its decohering power. The connection between coherence fraction and l1-norm coherence turns to hold for bipartite pure states and X states too. The bipartite generalization shows that the local coherence fractions of a quantum state are not free and they are bounded by linear function of its global coherence fraction. Dynamics of optimal coherence fraction is also studied for single- sided and both-sided application of channels. The numerical results are provided in exploring properties of optimal coherence fraction. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
About the journal
JournalData powered by TypesetQuantum Information Processing
PublisherData powered by TypesetSpringer New York LLC
ISSN1570-0755
Open AccessNo