2003/11/17 by Alexandra Olaya-Castro, Neil F. Johnson, Luis Quiroga · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Computer science #Concurrence #Coupling (piping) #Duality (order theory) #Ion #Laser-Matter Interactions and Applications #Materials science #Mathematics #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Resonance (particle physics) #Symmetry (geometry) #quant-ph
paper · pdf · doi:10.1103/physreva.70.020301
published as Phys. Rev A 70 020301(R) (2004) · 4 pages, 4 figures
arxiv created 2003/11/17 · openalex publication_date 2004/08/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present an efficient scheme for the controlled generation of pure two-qubit states possessing any desired degree of entanglement and a prescribed symmetry. This is achieved in two-qubit-cavity QED systems (e.g., cold-trapped ions and flying atoms) via on-resonance ion- or atom-cavity couplings, which are time dependent and asymmetric, yielding a trapping vacuum state condition which does not arise for identical couplings. A duality in the role of the coupling ratio yields states with a given concurrence but opposing symmetries. Both the trapping state condition and the resulting entanglement power are robust against decoherence channels.