Efficient optical cat state generation using squeezed few-photon superposition states
Fuente:
arXiv
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908834806628352 |
|---|---|
| author | Luo, Haoyuan Mahmoodian, Sahand |
| author_facet | Luo, Haoyuan Mahmoodian, Sahand |
| contents | Optical Schrödinger cat states are non-Gaussian states with applications in quantum technologies, such as for building error-correcting states in quantum computing. Yet the efficient generation of high-fidelity optical Schrödinger cat states is an outstanding problem in quantum optics. Here, we propose using squeezed superpositions of zero and two photons, $|θ\rangle = \cos{(θ/2)}|0\rangle + \sin{(θ/2)}|2\rangle$, as ingredients for protocols to efficiently generate high-fidelity cat states. We present a protocol using linear optics with success probability $P\gtrsim 50\%$ that can generate cat states of size $|α|^2=5$ with fidelity $F>0.99$. The protocol relies only on detecting single photons and is remarkably tolerant of loss, with $2\%$ detection loss still achieving $F>0.98$ for cats with $|α|^2=5$. We also show that squeezed $θ$ states are ideal candidates for nonlinear photon subtraction using a two-level system with near deterministic success probability and fidelity $F>0.98$ for cat states of size $|α|^2=5$. Schemes for generating $θ$ states using quantum emitters are also presented. Our protocols can be implemented with current state-of-the-art quantum optics experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14798 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient optical cat state generation using squeezed few-photon superposition states Luo, Haoyuan Mahmoodian, Sahand Quantum Physics Optical Schrödinger cat states are non-Gaussian states with applications in quantum technologies, such as for building error-correcting states in quantum computing. Yet the efficient generation of high-fidelity optical Schrödinger cat states is an outstanding problem in quantum optics. Here, we propose using squeezed superpositions of zero and two photons, $|θ\rangle = \cos{(θ/2)}|0\rangle + \sin{(θ/2)}|2\rangle$, as ingredients for protocols to efficiently generate high-fidelity cat states. We present a protocol using linear optics with success probability $P\gtrsim 50\%$ that can generate cat states of size $|α|^2=5$ with fidelity $F>0.99$. The protocol relies only on detecting single photons and is remarkably tolerant of loss, with $2\%$ detection loss still achieving $F>0.98$ for cats with $|α|^2=5$. We also show that squeezed $θ$ states are ideal candidates for nonlinear photon subtraction using a two-level system with near deterministic success probability and fidelity $F>0.98$ for cat states of size $|α|^2=5$. Schemes for generating $θ$ states using quantum emitters are also presented. Our protocols can be implemented with current state-of-the-art quantum optics experiments. |
| title | Efficient optical cat state generation using squeezed few-photon superposition states |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2412.14798 |