Related papers: Iterative $C_Z$-gate-based protocol for squeezed Schrödinger cat state engineering

Iterative $C_Z$-gate-based protocol for squeezed Schrödinger cat state engineering

URL: http://arxiv.org/abs/2606.02201v1
Date: Mon, 01 Jun 2026 12:58:00 GMT
Title: Iterative $C_Z$-gate-based protocol for squeezed Schrödinger cat state engineering
Abstract summary: We propose a measurement-assisted gate for the generation and manipulation of cat states.<n>The proposed gate enables generation of high-fidelity squeezed Schrdinger cat states with controllable size.<n>The approach is well suited for applications in measurement-based quantum computing and hybrid quantum networks.
Score: 0.0695155813793092
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Squeezed optical Schrödinger cat states constitute a key resource for both fundamental tests of quantum theory and up-to-date quantum technologies. We propose a measurement-assisted gate for the generation and manipulation of the cat states. In this scheme, an ancilla in the non-Gaussian small-amplitude (in general, squeezed) Schrödinger cat state and the target oscillator initially prepared in a squeezed vacuum (or coherent) state are subjected to a quantum nondemolition (QND) entangling operation followed by projective homodyne measurement. The proposed gate enables generation of high-fidelity squeezed Schrödinger cat states with controllable size and squeezing with tunable fidelity/success-probability trade-off. We also introduce an iterative, homodyne-conditioned $C_Z$-based protocol for cat-state amplification. The parameter regimes required to achieve the desired fidelity and the success probability are analyzed. The approach is well suited for applications in measurement-based quantum computing and hybrid quantum networks where non-Gaussian resources enhance computational and communication capabilities.

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