2023/11/28 by Piotr T. Grochowski, Grochowski, Piotr T., Hannes Pichler +5 · 7 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Cold Atom Physics and Bose-Einstein Condensates #Mechanical and Optical Resonators
paper · pdf · doi:10.48550/arxiv.2311.16819
We present a theoretical proposal for preparing and manipulating a state of a single continuous-variable degree of freedom confined to a nonharmonic potential. By utilizing optimally controlled modulation of the potential's position and depth, we demonstrate the generation of non-Gaussian states, including Fock, Gottesman-Kitaev-Preskill, multi-legged-cat, and cubic-phase states, as well as the implementation of arbitrary unitaries within a selected two-level subspace. Additionally, we propose protocols for single-shot orthogonal state discrimination, algorithmic cooling, and correcting for nonlinear evolution. We analyze the robustness of this control scheme against noise. Since all the presented protocols rely solely on the precise modulation of the effective nonharmonic potential landscape, they are relevant to several experiments with continuous-variable systems, including the motion of a single particle in an optical tweezer or lattice, or current in circuit quantum electrodynamics.