中国物理B ›› 2024, Vol. 33 ›› Issue (9): 90306-090306.doi: 10.1088/1674-1056/ad50bf
Preparation of entangled W states based on the cavity QED system
Ke Li(李可)1,† and Jun-Long Zhao(赵军龙)2
- 1 Department of Physics, Shanghai Second Polytechnic University, Shanghai 201209, China;
2 Quantum Information Research Center, Shangrao Normal University, Shangrao 334001, China
Preparation of entangled W states based on the cavity QED system
Ke Li(李可)1,† and Jun-Long Zhao(赵军龙)2
- 1 Department of Physics, Shanghai Second Polytechnic University, Shanghai 201209, China;
2 Quantum Information Research Center, Shangrao Normal University, Shangrao 334001, China
摘要： We present a qubit-loss-free (QLF) fusion scheme for generating large-scale atom W states in cavity quantum electrodynamics (QED) system. Compared to the most current fusion schemes which are conditioned on the case where one particle can be extracted from each initial W state to the fusion process, our scheme will access one or two particles from each W state. Based on the atom-cavity-field detuned interaction, three $|W\rangle_{n+m+t}$ states can be generated from the $|W\rangle_n$, $|W\rangle_m$, and $|W\rangle_t$ states with the help of two auxiliary atoms, and three $|W\rangle_{n+m+t+q}$ states can be generated from $|W\rangle_n$, $|W\rangle_m$, $|W\rangle_t$, and a $|W\rangle_q$ state with the help of three auxiliary atoms. Comparing the numerical simulations of the resource cost of fusing three small-size W states based on the previous schemes, our fusion scheme seems to be more efficient. This QLF fusion scheme can be generalized to the case of fusing $k$ different or identical particle W states. Furthermore, with no qubit loss, it greatly reduces the number of fusion steps and prepares W states with larger particle numbers.
中图分类号: (Quantum algorithms, protocols, and simulations)
- 03.67.Ac