Generation of bipartite mechanical cat state by performing projective Bell state measurement

Abstract:Quantum state preparation and measurement of photonic and phononic Schrödinger cat states have gathered significant interest due to their implications for alternative encoding schemes in quantum computation. These scheme employ coherent state superpositions, leveraging the expanded Hilbert space provided by cavity or mechanical resonators in contrast to two-level systems. Moreover, such cat states also serve as a platform for testing fundamental quantum phenomena in macroscopic systems. In this study, we generate four bipartite phononic Bell cat states using an entanglement swapping scheme achieved through projective Bell state measurements on two superconducting qubits. Subsequently, we conduct a Bell inequality test on the bipartite cat state using the CHSH formulation. Given that the entangled cat states are generated through entanglement swapping, our approach could hold promising applications for the advancement of complex quantum network processors based on continuous variable systems.

arXiv:2404.16007 [quant-ph]

(or arXiv:2404.16007v2 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2404.16007 Focus to learn more arXiv-issued DOI via DataCite

https://doi.org/10.1103/PhysRevA.110.023726 Focus to learn more DOI(s) linking to related resources

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.