Encrypted quantum correlations: delayed choice of quantum statistics and other applications
Authors: Gessner M., Smerzi A.
Autors Affiliation: PSL Univ, Ecole Normale Super, CNRS, Dept Phys, Paris, France; Sorbonne Univ, Lab Kastler Brossel, Coll France, ENS,PSL,CNRS, Paris, France; CNR, INO, QSTAR, Florence, Italy; LENS, Florence, Italy
Abstract: In a three-particle extension of Wheeler’s delayed choice gedanken experiment, the quantum statistics of two particles is undetermined until a third particle is measured. As a function of the measurement result, the particles behave either as bosons or as fermions. The particles are distinguishable if no measurement is performed at all or when the measurement is performed in a rotated basis. The scheme is based on Greenberger-Horne-Zeilinger quantum correlations. It can be interpreted more generally as the encryption of maximally entangled states in a larger quantum superposition. The local quantum information is scrambled but can be decoded by the measurement result of a control particle. This can be extended to multiple particles and allows to develop quantum information protocols whose successful implementation depends on the collaboration of all parties.
Journal/Review: EPJ QUANTUM TECHNOLOGY
Volume: 6 (1) Pages from: 4-1 to: 4-9
KeyWords: Delayed-choice experiment; Hong-Ou-Mandel effect; Entanglement; GHZ states; Quantum communication; Nonlocality; Quantum eraser; Heisenberg limitDOI: 10.1140/epjqt/s40507-019-0074-yConnecting to view paper tab on IsiWeb: Click here