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

Communications in Theoretical Physics

Application of Tripartite Entangled State Representation in Solving the Dynamics of a Kind of Three Coupled Oscillators

Pang Qian-Jun

Published Jun 1, 2005• 1 citation
Publisher

Abstract

We study the eigenstate problem of a kind of three coupled oscillators in a new quantum mechanical representation composed by the spontaneous eigenvectors ⟨ p , q 2 , q 3 | for three operators ( p 1 + p 2 + p 3 ), ( x 3 − x 2 ), and ( x 3 − x 1 ). The eigenvalues and eigenvectors of the Hamiltonian are obtained. With the same method, the eigenstate problem of a generalized three-coupled oscillator Hamiltonian is studied, which has never been studied before.

DOI
10.1088/0253-6102/43/6/016

Related papers

Application of Tripartite Entangled State Representation in Solving the Dynamics of a Kind of Three Coupled Oscillators

PANGQian-Jun

We study the eigenstate problem of a kind of three coupled oscillators in a new quantum mechanical representation composed by the spontaneous eigenvectors 〈p, q2, q3| for three operators (p1 +p2 +p3), (x3 - x2), and (x3 - x1). The eigenvalues and eigenvectors of the Hamiltonian are obtained. With the same method, the eigenstate problem of a generalized three-coupled oscillator Hamiltonian is studied, which has never been studied before.

理论物理通讯:英文版•Jan 1, 2005•0 citations

Application of new entangled state representation to a two-coupled oscillator system

Pang Qian-Jun

We study the eigenstate problem of a two-coupled oscillator system. A new entangled state representation |γ composed of the common eigenvectors of operators (x1+p2) and (p1+x2) is established. Eigenvalues and eigenvectors of the Hamiltonian are obtained in |γ representations. The same problem is studied in the second-quantization representation. We find that the second-quantization representation can be used to derive the normally ordered product expression of eigenvector in Fock space. In particular, we find that the ground state of the Hamiltonian is a kind of generalized two-mode squeezed state.

Chinese Physics•Jun 23, 2005•4 citations

Application of Coordinate-Momentum Intermediate Representation in Solving Eigenstate Problem of a Coupled Oscillator System

Pang Qian-Jun

We study the eigenstate problem of a kind of coupled oscillators in the new quantum mechanical representation | q ,μ,ν⟩, which is defined as the eigenvector of the operator (μ Q + ν P ), where μ and ν are two real parameters. We also use the U operator transformation method to deal with the same problem. We obtain the normally ordered product expressions of U operator and eigenvector. It is shown that the ground state of system Hamiltonian is a squeezed state.

Communications in Theoretical Physics•Sep 1, 2005•0 citations

Application of Coordinate-Momentum Intermediate Representation in Solving Eigenstate Problem of a Coupled Oscillator System

Pang, Qian-Jun

We study the eigenstate problem of a kind of coupled oscillators in the new quantum mechanical represen tation |q, μ, v〉, which is defined as the eigenvector of the operator (μQ + vP), where μ and v are two realparameters. We also use the U operator transformation method to deal with the same problem. We obtain the normally ordered product expressions of U operator and eigenvector. It is shown that the ground state of system Hamiltonian is a squeezed state.

理论物理通讯:英文版•Jan 1, 2005•0 citations

Energy Spectrum of a Bipartite Complicated-Coupled-Oscillator System

Pang Qian-Jun

We present a general discussion on the eigenstate problem of a bipartite complicated-coupled-oscillator system. By use of a generalized intermediate entangled state representation, the eigenvalue and eigenfunction of Hamiltonian are analytically obtained. As its application, we obtain the energy spectrum for two special situations of Hamiltonian.

Communications in Theoretical Physics•Mar 1, 2006•0 citations

A New Kind of Bipartite Entangled State Representation and its Application

Shimin Xu, Xing-Lei Xu, Hongqi Li +1 more

We construct four linear composite operators for a two-particle system and give common eigenvectors of those operators. The technique of integration within an ordered product of operators is employed to prove that those common eigenvectors are complete and orthonormal. Therefore, a new intermediate coordinate-momentum representation for a two-particle system is proposed and applied to some two-body dynamic problems.

Communications in Theoretical Physics•Feb 1, 2009•1 citation
We study the eigenstate problem of a kind of three coupled oscillators in a new quantum mechanical representation composed by the spontaneous eigenvectors ⟨ p , q 2 , q 3 | for three operators ( p 1 + p 2 + p 3 ), ( x 3 − x 2 ), and ( x 3 − x 1 ). The eigenvalues and eigenvectors of the Hamiltonian are obtained. With the same method, the eigenstate problem of a generalized three-coupled oscillator Hamiltonian is studied, which has never been studied before.
We study the eigenstate problem of a two-coupled oscillator system. A new entangled state representation |γ composed of the common eigenvectors of operators (x1+p2) and (p1+x2) is established. Eigenvalues and eigenvectors of the Hamiltonian are obtained in |γ representations. The same problem is studied in the second-quantization representation. We find that the second-quantization representation can be used to derive the normally ordered product expression of eigenvector in Fock space. In particular, we find that the ground state of the Hamiltonian is a kind of generalized two-mode squeezed state.