Quantum non-Gaussianity of multi-phonon states of trapped ions

0568275 - ÚPT 2023 PL eng A - Abstrakt
Slodička, L. - Podhora, L. - Lachman, L. - Kovalenko, A. - Lešundák, Adam - Pham, Minh Tuan - Čížek, Martin - Číp, Ondřej - Filip, R.
Quantum non-Gaussianity of multi-phonon states of trapped ions.
Book of Abstracts. 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, September 5-9, 2022, Wojanów, Poland. Wrocław: Wroclaw University of Science and Technology, 2022 - (Sztylińska, K.). s. 51
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /22./. 05.09.2022-09.09.2022, Wojanów]
Institucionální podpora: RVO:68081731
Klíčová slova: trapped ions * Paul trap * quantum mechanical motion * quantum non-Gaussianity
Obor OECD: Optics (including laser optics and quantum optics)
https://psc2022.pwr.edu.pl/docs/pscoc2022_book_of_abstracts.pdf

We present experimental results on deterministic generation and unambiguous estimation of the quantum non-Gaussian states of motion of trapped ions. We realize the method for a robust experimental accumulation of nonclassicality of motion by deterministic incoherent modulation of thermal phonon number distribution. We demonstrate that repetitive application of the nonlinear anti-Jaynes-Cummings interaction monotonically accumulates the observable state nonclassicality and entanglement potential. 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. We demonstrate a hierarchy of quantum non-Gaussianity criteria suitable for the atomic-mechanical systems, where mechanical heating corresponds to the typical limitation for the preservation of such sensitive properties and present its implementation on up to 10-phonon states of a trapped ion oscillator. We analyze the depth of quantum non-Gaussian features under mechanical heating and predict their application in quantum sensing. These results uncover that the crucial quantum non-Gaussian features are demanded to reach quantum advantage in the applications.
Trvalý link: https://hdl.handle.net/11104/0339603