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- Title
Implementation of Photonic Phase Gate and Squeezed States via a Two-Level Atom and Bimodal Cavity.
- Authors
Tang, Shiqing; Jiang, Xi; Wang, Xinwen; Zhao, Xingdong
- Abstract
We propose a theoretical model for realizing a photonic two-qubit phase gate in cavity QED using a one-step process. The fidelity and probability of success of the conditional quantum phase gate is very high in the presence of cavity decay. Our scheme only employs one two-level atom, and thus is much simpler than other schemes involving multi-level atoms. This proposal can also be applied to generate two-mode squeezed states; therefore, we give three examples, i.e., the two-mode squeezed vacuum state, two-mode squeezed odd coherent state, and two-mode squeezed even coherent state, to estimate the variance of Duan's criterion when taking into account cavity decay. It is shown that the variance is smaller than 2 for the three squeezed states in most cases. Furthermore, we utilize logarithmic negativity to measure the entanglement, and find that these squeezed states have very high degrees of entanglement.
- Subjects
COHERENT states; QUANTUM gates; ATOMS; SQUEEZED light; QUBITS; CONDITIONAL probability
- Publication
Photonics, 2022, Vol 9, Issue 8, p583
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics9080583