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Updated: Jan 19, 2026
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Allowed and forbidden bipartite correlations from thermal states
Tamal Guha1, Mir Alimuddin1, Preeti Parashar1
1Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata 700108, India.
Physical Review. E
|September 11, 2019
Summary
Researchers explored creating quantum correlations and entanglement from thermal qubits. They identified allowed/forbidden correlations and a temperature threshold for entanglement, with applications for distant quantum communication.
Area of Science:
- Quantum Information Science
- Quantum Thermodynamics
- Quantum Correlations
Background:
- The link between quantum correlations and thermodynamics is significant.
- Preparing correlated quantum states from thermal qubits is an open question.
Purpose of the Study:
- Investigate allowed and forbidden bipartite correlations from thermal qubits.
- Develop strategies for generating entanglement from thermal states.
- Determine the temperature threshold for entanglement creation.
Main Methods:
- Analysis of bipartite correlations in thermal states.
- Resource-theoretic approach to entanglement generation.
- Derivation of temperature bounds for entanglement.
Main Results:
- Characterization of allowed and forbidden bipartite correlations.
- Extension of results to separable, non-absolutely separable states.
- Proposal for establishing entanglement between distant parties.
- Identification of a temperature threshold for entanglement from thermal qubits.
- Derivation of a dimension-dependent upper bound on temperature for entanglement.
Conclusions:
- Entanglement can be prepared from thermal qubits under specific conditions.
- Resource states can help overcome temperature limitations for entanglement.
- The derived temperature bound is crucial for quantum information processing applications.
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