Unconditional accumulation of nonclassicality in a single-atom mechanical oscillator

We report on the robust experimental accumulation of nonclassicallity of motion of a single trapped ion. The nonclassicality stems from deterministic incoherent modulation of thermal phonon number distribution implemented by a laser excitation of nonlinear coupling between the ion's internal -...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2020-04
Main Authors: Podhora, L, Pham, T, Lešundák, A, Obšil, P, Čížek, M, Číp, O, Marek, P, Slodička, L, Filip, R
Format: Article
Language:English
Subjects:
Accumulation
Entanglement
Mechanical oscillators
Phonons
Robustness
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on the robust experimental accumulation of nonclassicallity of motion of a single trapped ion. The nonclassicality stems from deterministic incoherent modulation of thermal phonon number distribution implemented by a laser excitation of nonlinear coupling between the ion's internal - electronic levels and external - motional states. We demonstrate that the repetitive application of this nonlinear process monotonically accumulates the observable state nonclassicality. The output states converge to a phonon number distribution with high overlap with a particular Fock state and visible quantum non-Gaussian aspects including corresponding negative Wigner function. The resulting oscillator states prove deterministic transition in the hierarchy of quantum non-Gaussianity up to four phonons. This transition is very robust against experimental imperfections and produces increasing entanglement potential.
ISSN:2331-8422