Entanglement between two superconducting qubits via interaction with nonclassical radiation

2003/07/31 by Mauro Paternostro, G. Falci, Giuseppe Falci +2 · 3 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.69.214502

published as Phys. Rev. B 69, 214502 (2004) · 4 pages, RevTeX; revised version

arxiv created 2004/03/03 · openalex publication_date 2004/06/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose a scheme to physically interface superconducting nanocircuits and quantum optics. We address the transfer of quantum information between systems having different physical natures and defined in Hilbert spaces of different dimensions. In particular, we investigate the transfer of the entanglement initially in a nonclassical state of an infinite dimensional system to a pair of superconducting charge qubits. This setup is able to drive an initially separable state of the qubits into an almost pure, highly entangled state suitable for quantum information processing.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Separability Criterion for Density Matrices
• Quantum-state engineering with Josephson-junction devices
• Separability of mixed states: necessary and sufficient conditions

Cited by

• Quantum state conversion between continuous variable and qubits systems
• Entanglement generation and protection by detuning modulation
• Entanglement of mixed macroscopic superpositions: An entangling-power study