The authors obtain lower bounds for q-concurrence (1<q<2 for two-qudits, 2≤q<3 for two-qubits) and α-concurrence (½<α<1) via (N,M)-POVMs that exceed GSIC-POVM, SIC-POVM, PPT, and realignment bounds in tested cases, plus an analytical expression for isotropic states.
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A protocol generates loss-robust crossband entanglement by leveraging intraband entanglement, exceeding direct-transduction limits with performance scaling with input brightness.
Stochastic noise in non-Hermitian qubit systems away from exceptional points allows for highly efficient entanglement generation on timescales shorter than Hermitian or EP-based methods, independent of qubit number.
Unified-(q,s) entropy entanglement is an entanglement monotone and monogamous for q>1, qs≥1, yielding one complete tightly completely monogamous GlMEM and three incomplete ones based on unified entropy.
In a driven two-qubit battery-charger system, extractable battery capacity decreases monotonically with entanglement, steering, Bell nonlocality, coherence and imaginarity while increasing with quantum state texture, with all relations independent of chosen parameters.
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Computable lower bound of the parameterized entanglement monotone
The authors obtain lower bounds for q-concurrence (1<q<2 for two-qudits, 2≤q<3 for two-qubits) and α-concurrence (½<α<1) via (N,M)-POVMs that exceed GSIC-POVM, SIC-POVM, PPT, and realignment bounds in tested cases, plus an analytical expression for isotropic states.
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Loss-robust crossband entanglement generation beyond the direct-transduction limit
A protocol generates loss-robust crossband entanglement by leveraging intraband entanglement, exceeding direct-transduction limits with performance scaling with input brightness.
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Entanglement Dynamics with a Stochastic Non-Hermitian Hamiltonian away from Exceptional Points
Stochastic noise in non-Hermitian qubit systems away from exceptional points allows for highly efficient entanglement generation on timescales shorter than Hermitian or EP-based methods, independent of qubit number.
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Unified entropy entanglement
Unified-(q,s) entropy entanglement is an entanglement monotone and monogamous for q>1, qs≥1, yielding one complete tightly completely monogamous GlMEM and three incomplete ones based on unified entropy.
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Correlations Between Quantum Battery Capacity and Quantum Resources for Two-qubit System
In a driven two-qubit battery-charger system, extractable battery capacity decreases monotonically with entanglement, steering, Bell nonlocality, coherence and imaginarity while increasing with quantum state texture, with all relations independent of chosen parameters.