aiqbench analysis
This theoretical study proposes a more experimentally accessible method for generating optical GKP states using single-photon-added squeezed vacuum rather than Schrödinger cat states. By achieving 85% fidelity at a squeezing level of 3.76 dB, the scheme offers a promising pathway toward fault-tolerant photonic quantum computing with simpler experimental requirements.
Theoretical Study for Generating Optical GKP State via a Single-Photon-Added Squeezed Vacuum
arXiv:2606.12467v1 Announce Type: new Abstract: A theoretical framework is developed to analyze the generation of the optical GKP state using a single-photon-added squeezed vacuum. This state, defined by the squeezing parameter $r$, is injected into a 50:50 beam splitter, and the optical GKP state is obtained through conditional measurement at one output port. The single-photon-added squeezed vacuum is especially prominent in this context because it provides a simpler and more experimentally accessible ingredient than Schrodinger cat states, while conditional measurement ensures projection onto a state that closely approximates the finite-energy GKP form. Fidelity is employed to quantify this closeness, and the analysis demonstrates that the scheme achieves a maximum fidelity of 85% at a squeezing level of $3.76 \ \text{dB}$. This performance surpasses approaches based on squeezed optical odd Schrodinger cat states, underscoring the single-photon-added squeezed vacuum as a practical and effective pathway toward fault-tolerant photonic quantum computing.
Abstract:A theoretical framework is developed to analyze the generation of the optical GKP state using a single-photon-added squeezed vacuum. This state, defined by the squeezing parameter $r$, is injected into a 50:50 beam splitter, and the optical GKP state is obtained through conditional measurement at one output port. The single-photon-added squeezed vacuum is especially prominent in this context because it provides a simpler and more experimentally accessible ingredient than Schrodinger cat states, while conditional measurement ensures projection onto a state that closely approximates the finite-energy GKP form. Fidelity is employed to quantify this closeness, and the analysis demonstrates that the scheme achieves a maximum fidelity of 85% at a squeezing level of $3.76 \ \text{dB}$. This performance surpasses approaches based on squeezed optical odd Schrodinger cat states, underscoring the single-photon-added squeezed vacuum as a practical and effective pathway toward fault-tolerant photonic quantum computing.
This is a preprint of an article submitted to Communications in Theoretical Physics. The final authenticated version will be available online through the journal
Quantum Physics (quant-ph); Applied Physics (physics.app-ph); Optics (physics.optics)
arXiv:2606.12467 [quant-ph]
(or arXiv:2606.12467v1 [quant-ph] for this version)
Full text under the publisher's open licence · 183 words