Universal feedback control of two-qubit entanglement

2017/04/07 by Morteza Rafiee, Alireza Nourmandipour, Stefano Mancini · 21 citations
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Action (physics) #Combinatorics #Computer science #Control (management) #Control engineering #Control theory (sociology) #Dissipation #Engineering #Feedback control #Hamiltonian (control theory) #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Qubit #Topology (electrical circuits) #quant-ph

paper · pdf · doi:10.1103/physreva.96.012340

published in Physical Review A 96(1) (American Physical Society) · 10 pages, 6 figures

arxiv created 2017/04/07 · openalex publication_date 2017/07/31 · arxiv updated 2017/08/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider two qubits undergoing local dissipation and subject to local driving. We then determine the optimal Markovian feedback action to preserve initial entanglement as well as to create stationary entanglement with the help of an XY interaction Hamiltonian. Such feedback actions are worked out in a way not depending on the initial two-qubit state, whence called universal.

Citations

• Entanglement control via reservoir engineering in ultracold atomic gases
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Coherent control of multipartite entanglement
• Bayesian feedback versus Markovian feedback in a two-level atom
• Quantum theory of continuous feedback
• A Single-Atom Quantum Memory
• Coupling superconducting qubits via a cavity bus
• Robust entanglement in antiferromagnetic Heisenberg chains by single-spin optimal control
• Quantum entanglement