Entanglement enhancement for two spins assisted by two phase kicks

2009/06/16 by Gennadiy Burlak, Isabel Sainz, A. B. Klimov +1 · 5 citations
Computer Science · Mathematics · Physics and Astronomy · #Concurrence #Condensed matter physics #Hamiltonian (control theory) #Mathematics #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Spectroscopy and Quantum Chemical Studies #Spin (aerodynamics) #Spins #quant-ph

paper · pdf · doi:10.1103/physreva.80.024301

published in Physical Review A 80(2) (American Physical Society) · 10 pages, 3 figures

arxiv created 2009/06/16 · openalex publication_date 2009/08/04 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the entanglement dynamics in a two-spin system governed by a bilinear Hamiltonian and assisted by phase kicks. It is found that the application of instant kicks to both spins at some specific moments leads to enhancement of entanglement. This procedure also improves the transient character of entanglement leading, for large spins, to a formation of a plateau for the I concurrence. We have numerically investigated the spin-spin dynamics for several values of spins and observed a substantial enhancement of entanglement in comparison to the evolution without kicks.

Citations

• Quantum Key Distribution with Higher-Order Alphabets Using Spatially Encoded Qudits
• Light-matter quantum interface
• Spin squeezing and entanglement
• Squeezed spin states
• Universal state inversion and concurrence in arbitrary dimensions
• Entanglement in many-body systems