Decoherence effects in entangled fermion pairs at colliders
Abstract
Recent measurements at the Large Hadron Collider have observed entanglement in the spins of t t ¯ pairs. The effects of radiation, which are expected to lead to quantum decoherence and a reduction of entanglement, are generally neglected in such measurements. In this work we calculate the effects of decoherence from various different types of radiation for a maximally entangled pair of fermions—a bipartite system of qubits in a Bell state. We identify the Kraus operators describing the evolution of the open quantum system with the integrated Altarelli-Parisi splitting functions.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
International Science and Diplomacy
Quantum and Classical Electrodynamics
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 7
- Publication date
- 5 March 2026
- Language
- EN