2002/09/04 by Z. Gedik, Zafer Gedik
Chemistry · Computer Science · Mathematics · Physics and Astronomy · #Chemistry #Computer science #Concurrence #Generalization #Mathematical analysis #Mathematics #Measure (data warehouse) #Operator (biology) #Pairing #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Quantum system #Statistical physics #Superconductivity #Transformation (genetics) #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1016/s0038-1098(02)00551-3
published as Solid State Communications 124 (2002) 473-476 · submitted to Solid State Communications (the Festschrift in the honor of Prof. Salim Ciraci's 60th birthday)
arxiv created 2002/09/04 · openalex publication_date 2002/12/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the pairing correlations in a finite Fermi system from quantum entanglement point of view. We investigate the relation between the order parameter, which has been introduced recently to describe both finite and infinite superconductors, and the concurrence. For a proper definition of the concurrence, we argue that a possible generalization of spin flip transformation is time reversal operation. While for a system with indefinite number of particles concurrence is a good measure of entanglement, for a finite system it does not distinguish between normal and superconducting states. We propose that the expectation value of the radial operator for the total pseudospin can be used to identify entanglement of pairing.