Stationary three-dimensional entanglement via dissipative Rydberg pumping

Abstract

We extend the recent result of bipartite Bell singlet [Carr and Saffman, Phys. Rev. Lett. 111, (2013)] to a stationary three-dimensional entanglement between two-individual neutral Rydberg atoms. This proposal makes full use of the coherent dynamics provided by Rydberg mediated interaction and the dissipative factor originating from the spontaneous emission of Rydberg state. The numerical simulation of the master equation reveals that both the target state negativity N (ρ∞) and fidelity F(ρ∞) can exceed 99.90%. Furthermore, a steady three-atom singlet state |S3 is also achievable based on the same mechanism.

Dissipative stabilization of quantum-feedback-based multipartite entanglement with Rydberg atoms

“…In this paper, we propose an efficient scheme for stabilization of quantum-feedback-based entanglement with Rydberg atoms [33][34][35][36][37][38][39]. The advantage for adopting Rydberg atoms as qubits is twofold: On the one hand, an excited atom can cause sufficiently large energy shifts of Rydberg states in its neighboring atoms, thus the whole system is blockaded into a single excitation subspace at most.…”

Linear-Optical Proposal for Implementation of the Two-Logic-Qubit Controlled Phase Gate in Decoherence-Free Subspace with Conventional Photon Detectors

“…, dissipative dynamics [8][9][10][11][12][13][14][15], entanglement purification [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and concentration [32][33][34][35][36][37][38][39][40][41][42], quantum self-error-rejecting code [43,44], DFS [45][46][47] and so on, have been investigated to fight against the decoherence. However, in practice, error correction approach relies on high-fidelity gates for detecting as well as correcting errors, which increases the difficulty in experiment.…”

Adiabatic Generation of N-quNit Singlet States with Cavity QED

“…presented a scheme for the preparation of NNSS with N  = 3 (33SS), attracting much attention15. After that, several scenarios were proposed for generating 33SS1617181920212223, in which only two different methods were used. One method needs several steps to generate 33SS15, while the other one proposed by us needs only one step to generate 33SS from 22SS18 and it may be generalized for generating NNSS with N  > 3 more easily than the first one.…”