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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Quantum teleportation in interacting hydrogenlike atom systems

Oleg N. Gadomsky, Алтунин Константин Константинович

Published Jan 14, 2000• 0 citations
Publisher

Abstract

This paper discusses an experimental scheme of quantum teleportation with two atomic beams in terms of the interaction between atoms of different bema via the field of virtual photon field with the emission or absorption of a real photon is interpreted as a third-order QED effect. Quantum teleportation of an unknown broadband electromagnetic field is investigated. Two types of field may be formate between tow beams, which we are considering. At first, the field of real photons exhibits with a time lag equal to L/c, where L is the distance between beams, c is the speed of light in vacuum. The second type of field is the polarizing field as the field of virtual photons. The polarizing field has formatted in the location of atoms of other beam instantaneously. The field is connected with the effect of quantum teleportation. We also consider other types of atom interaction, in which exhibit the effect of quantum teleportation, e.g., cooperation annihilation parapositronium atoms. Recently, it was realized that use of the properties of quantum electrodynamics might speed up certain computations and communication processes dramatically. Interest has since ben growing in the area of quantum teleportation. Quantum teleportation will be used for the construction of quantum computation networks.

DOI
10.1117/12.375354

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This paper discusses an experimental scheme of quantum teleportation with two atomic beams in terms of the interaction between atoms of different bema via the field of virtual photon field with the emission or absorption of a real photon is interpreted as a third-order QED effect. Quantum teleportation of an unknown broadband electromagnetic field is investigated. Two types of field may be formate between tow beams, which we are considering. At first, the field of real photons exhibits with a time lag equal to L/c, where L is the distance between beams, c is the speed of light in vacuum. The second type of field is the polarizing field as the field of virtual photons. The polarizing field has formatted in the location of atoms of other beam instantaneously. The field is connected with the effect of quantum teleportation. We also consider other types of atom interaction, in which exhibit the effect of quantum teleportation, e.g., cooperation annihilation parapositronium atoms. Recently, it was realized that use of the properties of quantum electrodynamics might speed up certain computations and communication processes dramatically. Interest has since ben growing in the area of quantum teleportation. Quantum teleportation will be used for the construction of quantum computation networks.
Abstract Quantum teleportation is an interesting feature of quantum mechanics. Entanglement is used as a link between two remote locations to transfer a quantum state without physically sending it – a process that cannot be realized utilizing merely classical tools. Furthermore it has become evident that teleportation is also an important element of future quantum networks and it can be an ingredient for quantum computation. This article reports for the first time the teleportation from light to atoms. In the experiment discussed, the quantum state of a light beam is transferred to an atomic ensemble. The key element of light‐atom entanglement created via a dispersive interaction lays the foundation for the protocol.
We consider the problem of teleporting an unknown information state within a quantum network by a sender, say, Alice to any given receiver out of several receivers, say, Bob(1), Bob(2), ...., Bob(n). For this task, we suggest two schemes using (n+1)-partite GHZ state as a quantum channel. The first scheme involves C-NOT operations on qubit of Bobs with the control as qubit of Alice, while the second scheme involves measurements in the Hadamard basis by Bobs on their qubits. We have generalized both schemes for quantum teleportation of arbitrary m-qubit information state within the quantum network. Further, we have proposed two experimental schemes for the generation of (n+1)-partite GHZ state using interaction between highly detuned Λ-type three-level atoms and optical coherent field. We also discuss the possible experimental imperfections like, atomic-radiative time, cavity damping time and atom-cavity interaction time.
Time evolution of state vector of the system of V-type three-level-atom interacting with two-mode cavity field is obtained.An alternative scheme is proposed for teleportation of an unknown atomic-entangled state without the Bell-state measurement.The scheme is based on the resonant interaction of V-type three-level-atom with two-mode cavity field.By means of selective measurement on the atom to be teleported state,it follows that the teleportation of an unknown atomic-entangled state is realized.And the scheme is experimentally feasible based on the current cavity QED technique and the success probability is 1/16.
This paper solves the problem of the interaction, via the field of virtual photon field with the emission or absorption of a real photon, of two atomic electrons located at arbitrary distances from one another. The interaction is interpreted as a third-order QED effect in the coordinate representation. The role of intermediate states with positive and negative frequencies is studied. A general expression is derived for the matrix elements of the operator of the effective electron-electron interaction energy for different types of quantum transitions. The expression makes it possible to calculate the probabilities of the corresponding transitions and to examine various patterns of induction of polarizing fields by one atom at the point occupied by the other atom. The exchange of virtual photons between the atoms located at arbitrary distances from one another is shown to lead to additional terms in the operators of spin-orbit and spin-spin coupling of the atomic electrons, over and above those in the corresponding Breit operators. It is shown that there is an important difference between the induction of polarizing fields and the transfer of optical photons. In particular, it is found that when polarizing fields are induced, a situation may arise in which the disappearance (production) of a photon takes place at the point occupied by one atom, while absorption (emission) of the same photon occurs at the place occupied by the other atom. A block diagram of an experimental device that could be used to study this property of polarizing fields is presented. Finally, a method of deriving integral field equations is proposed. The method is based on allowing for polarizing fields, and its effectiveness is demonstrated by the example of electric dipole and spin transitions in the spectrum of interacting atomic electrons.
The interaction of V-type three-level atom with two-mode cavity field is described and the interaction formula between atom and cavity field is obtained.An alternative scheme is proposed for teleportation of an unknown atomic-entangled state without the Bell-state measurement.The scheme is based on the resonant interaction of V-type three-level-atom with two-mode cavity field.By means of selective measurement on the atom to be teleported state,it follows that the teleportation of an unknown atomic-entangled state is realized.And the scheme is experimentally feasible based on the current cavity QED technique and the success probability is 1/16.
An alternative scheme is presented for teleportation of a two-atom entangled state in cavity quantum electrodynamics (QED). It is based on the resonant atom–cavity field interaction. In the scheme, only one cavity is involved, and the number of the atoms needed to be detected is decreased compared with the previous scheme. Since the resonant atom–cavity field interaction greatly reduces the interaction time, the decoherence effect can be effectively suppressed during the teleportation process. The experimental feasibility of the scheme is discussed. The scheme can easily be generalized to the teleportation of N-atom Greeninger–Horne–Zeilinger (GHZ) entangled states. The number of atoms needed to be detected does not increase as the number of the atoms in the GHZ state increases.