Quantum error correction may delay, but also cause, entanglement sudden death

2008/03/10 by Isabel Sainz, Gunnar Bjork, Gunnar Björk · 5 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #quant-ph

paper · pdf · doi:10.1103/physreva.77.052307

published as Phys. Rev. A 77, 052307 (2008) · 3 figures

arxiv created 2008/03/10 · openalex publication_date 2008/05/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Dissipation may cause two initially entangled qubits to evolve into a separable state in a finite time. This behavior is called entanglement sudden death (ESD). We study to what extent quantum error correction can combat ESD. We find that in some cases quantum error correction can delay entanglement sudden death but in other cases quantum error correction may cause ESD for states that otherwise do not suffer from it. Our analysis also shows that fidelity may not be the best measure to compare the efficiency of different error correction codes since the fidelity is not directly coupled to a state's remaining entanglement.

Citations

• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Finite-Time Disentanglement Via Spontaneous Emission
• A Class of Quantum Error-Correcting Codes Saturating the Quantum Hamming Bound
• Entanglement Breaking Channels

Cited by

• Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields
• Effect of relativistic acceleration on localized two-mode Gaussian quantum states
• Sudden death of distillability in qutrit-qutrit systems
• Entanglement sudden death as an indicator of fidelity in a four-qubit cluster state
• Entanglement Evolution of a Two-Qubit System beyond Rotating-Wave Approximation