Neutral atoms with cavity-assisted interaction for robust long distant quantum communication

Jeffrey H. Shapiro, Mohsen Razavi

Tasawar Abbas, Misbah Qurban, Rameez‐ul Islam +1 more

Luming Duan, B. Wang, Harry J. Kimble

We propose a scheme to achieve quantum computation with neutral atoms whose interactions are catalyzed by single photons. Conditional quantum gates, including an $N$-atom Toffoli gate and nonlocal gates on remote atoms, are obtained through cavity-assisted photon scattering in a manner that is robust to random variation in the atom-photon coupling rate and which does not require localization in the Lamb-Dicke regime. The dominant noise in our scheme is automatically detected for each gate operation, leading to signalled errors which do not preclude efficient quantum computation even if the error probability is close to the unity.

L.-M. Duan, Mikhail D. Lukin, J. I. Cirac +1 more

S. Y. Kim, Michael J. Gibbons, Kevin Fortier +2 more

Individual atoms are deterministically loaded into a high finesse optical cavity using an optical lattice. With cavity-assisted cooling, long interaction times of the atoms with the cavity field are achieved.

Yu-Ning Li, Feng Mei, Ya‐Fei Yu +1 more

We propose a scheme for long-distance quantum state transfer between different atoms based on cavity-assisted interactions. In our scheme, a coherent optical pulse sequentially interacts with two distant atoms trapped in separated cavities. Through the measurement of the state of the first atom and the homodyne detection of the final output coherent light, the quantum state can be transferred into the second atom with a success probability of unity and a fidelity of unity. In addition, our scheme neither requires the high- Q cavity working in the strong coupling regime nor employs the single-photon quantum channel, which greatly relaxes the experimental requirements.