2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/210024We study how photon addition and subtraction can be used to generate squeezed superpositions of coherent states in free-traveling fields (SSCSs) with high fidelities and large amplitudes. It is shown that an arbitrary $N$-photon subtraction results in the generation of a SSCS with nearly the perfect fidelity ($F>0.999$) regardless of the number of photons subtracted. In this case, the amplitude of the SSCS increases as the number of the subtracted photons gets larger. For example, two-photon subtraction from a squeezed vacuum state of 6.1dB can generate a SSCS of $α=1.26$, while in the case of the four-photon subtraction a SSCS of a larger amplitude $α=1.65$ is obtained under the same condition. When a photon is subtracted from a squeezed vacuum state and another photon is added subsequently, a SSCS with a lower fidelity ($F\approx 0.96$) yet higher amplitude ($α\approx2$) can be generated. We analyze some experimental imperfections including inefficiency of the detector used for the photon subtraction.8 pages, 9 figuresQuantum Physicstext