Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Yanbian University

The preparation of GHZ state based on Faraday rotation

Xin Ji

Published Jan 1, 2013• 0 citations
OpenAlex

Abstract

We propose a scheme to prepare the GHZ state of the atoms using the Faraday rotation produced by the input and output process of photons in the low quality cavity.The coupling between atom and cavity isn't strong in the scheme.Meanwhile,the quantum information is encoded in the low energy level of atoms.Therefore,our scheme is insensitive to both cavity decay and atomic spontaneous emission.In addition,we need not to impose the classical field or choose interaction time during the whole process,which reduces the difficulty of experiment.

Related papers

Remote state preparation via photonic Faraday rotation in low-Q cavities

Zhigang Yang, Wu Ting-Ting, Liu Jin-Ming

Based on the input-output relation in low-Q cavities, we propose a feasible scheme to prepare remotely a single-atom state via photonic Faraday rotation, and then the scheme is generalized to the case of remote preparation of a two-atom entangled state. Our results show that when the coefficients of the initial atomic state to be prepared are real, both remote preparation of the single-atom state and that of the two-atom entangled state can be achieved deterministically by selecting appropriate parameters of the systems for the interactions among the atom, polarized single-photon pulse, and cavity field. Compared with the existing schemes for remote preparation of atomic states, in our scheme photons are used as flying qubits to transmit quantum information, which is suitable indeed to achieve a long-distance atomic state preparation in principle. Due to the fact that the information of atomic state is encoded in two degenerate ground-state levels of a -type three-level atom confined in a unilateral dissipative cavity, and that the atoms are only virtually excited, our schemes are insensitive to both cavity decay and atomic spontaneous emission. Besides, the two schemes we proposed do not need two- or multi-particle orthogonal measurements, only product-state measurements are involved, as well as they work in low-Q regime and do not require a strong coupling condition between the atoms and the optical cavities, which greatly reduce the experimental difficulty.

Acta Physica Sinica•Jan 1, 2016•3 citations

Preparing a four-atom cluster state via photonic faraday rotations

HE Shuan

We propose a scheme for preparing a four-atom cluster state via photonic Faraday rotations in loss optical cavities connected by optical fibers.In this scheme,four three-level atoms are trapped inside coupled cavities,and the information is encoded in the low energy level,therefore our scheme is insensitive to both cavity decay and atomic spontaneous emission,so that the entanglement is more stable.

Journal of Yanbian University•Jan 1, 2013•0 citations

Implementation of photon Bell-state and GHZ-state analyzers through the Faraday rotation

Gu Yong-Jian, Xiaodong Chen, Xiu‐Min Lin +1 more

The schemes are presented for realizing optical Bell-state and GHZ-state analyzers through the Faraday rotation, which results from polarization photon reflected by optical cavity with trapped atom. They can be extended to the case of completely distinguishing photon Bell-state and GHZ-state without destroying quantum qubit. In the schemes, strong-coupling condition is not needed and the analyzers can be implemented in low-Q cavity, which further lower the diffculty in experiment.

Acta Physica Sinica•Jan 1, 2010•3 citations

QUANTUM TELEPORTATION VIA PHOTONIC FARADAY ROTATION

Juanjuan Chen, Jun‐Hong An

We propose a scheme for deterministically teleporting a pure quantum state, making use of the Faraday rotation of photonic polarization in cavity QED system. Based on the single-photon input-output process regarding cavities, the scheme works well even in low-Q cavities. Since only virtual excitation of the atoms is involved, it is also insensitive to atomic spontaneous emission. Besides, the CNOT operation replaced by the Faraday rotation is not needed in the scheme, which could greatly relax the experimental difficulty.

International Journal of Quantum Information•Aug 1, 2010•2 citations

Atomic GHZ States Prepared in Two Directly Coupled Cavities with Virtual Excitations in One Step

杨榕灿, 黄志平, 郭强 +3 more

A scheme for one-step preparation of atomic GHZ states in two directly coupled cavities via virtual excitations is proposed.In the whole procedure,the information is carried only in two ground states of A-type atoms, while the excited states of atoms and cavity modes are virtually excited,leading the system to be insensitive to atomic spontaneous emission and photon loss.更多还原

理论物理通讯：英文版•Jan 1, 2011•0 citations

Atomic GHZ States Prepared in Two Directly Coupled Cavities with Virtual Excitations in One Step

Rong‐Can Yang, Zhiping Huang, Yanqiang Guo +3 more

A scheme for one-step preparation of atomic GHZ states in two directly coupled cavities via virtual excitations is proposed. In the whole procedure, the information is carried only in two ground states of Λ-type atoms, while the excited states of atoms and cavity modes are virtually excited, leading the system to be insensitive to atomic spontaneous emission and photon loss.

Communications in Theoretical Physics•Oct 1, 2011•3 citations
We propose a scheme to prepare the GHZ state of the atoms using the Faraday rotation produced by the input and output process of photons in the low quality cavity.The coupling between atom and cavity isn't strong in the scheme.Meanwhile,the quantum information is encoded in the low energy level of atoms.Therefore,our scheme is insensitive to both cavity decay and atomic spontaneous emission.In addition,we need not to impose the classical field or choose interaction time during the whole process,which reduces the difficulty of experiment.
Based on the input-output relation in low-Q cavities, we propose a feasible scheme to prepare remotely a single-atom state via photonic Faraday rotation, and then the scheme is generalized to the case of remote preparation of a two-atom entangled state. Our results show that when the coefficients of the initial atomic state to be prepared are real, both remote preparation of the single-atom state and that of the two-atom entangled state can be achieved deterministically by selecting appropriate parameters of the systems for the interactions among the atom, polarized single-photon pulse, and cavity field. Compared with the existing schemes for remote preparation of atomic states, in our scheme photons are used as flying qubits to transmit quantum information, which is suitable indeed to achieve a long-distance atomic state preparation in principle. Due to the fact that the information of atomic state is encoded in two degenerate ground-state levels of a -type three-level atom confined in a unilateral dissipative cavity, and that the atoms are only virtually excited, our schemes are insensitive to both cavity decay and atomic spontaneous emission. Besides, the two schemes we proposed do not need two- or multi-particle orthogonal measurements, only product-state measurements are involved, as well as they work in low-Q regime and do not require a strong coupling condition between the atoms and the optical cavities, which greatly reduce the experimental difficulty.
We propose a scheme for deterministically teleporting a pure quantum state, making use of the Faraday rotation of photonic polarization in cavity QED system. Based on the single-photon input-output process regarding cavities, the scheme works well even in low-Q cavities. Since only virtual excitation of the atoms is involved, it is also insensitive to atomic spontaneous emission. Besides, the CNOT operation replaced by the Faraday rotation is not needed in the scheme, which could greatly relax the experimental difficulty.