Atomically Thin Semiconductor Emit Single Photons, High-Dimensional Hyperentanglement Through A Biphoton Frequency Comb, Efficient Compression Of Quantum Information, Heralded Qubit Transfer, Messages With A Quantum Seal, Quantum Digital Signatures, Singl

Abstract

Vaibhav Madhok, Vibhu Gupta, Denis-Alexandre Trottier, and Shohini Ghose identify signatures of chaos in the dynamics of discord in a multiqubit system collectively modelled as a quantum kicked top. Evolution of discord between any two qubits is quasiperiodic in regular regions, while in chaotic regions the quasiperiodicity is lost. As the initial wave function is varied from the regular regions to the chaotic sea, a contour plot of the time-averaged discord remarkably reproduces the structures of the classical stroboscopic map. Vaibhav Madhok, Vibhu Gupta, Denis-Alexandre Trottier, and Shohini Ghose also find surprisingly opposite behavior of two-qubit discord versus entanglement of the two qubits as measured by the concurrence.

The full paper: http://www.iiste.org/PDFshare/APTA-PAGENO-405514-409887.pdf