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

arXiv:0807.0907 · Physical Review A

Generation of entangled channels for perfect teleportation using multielectron quantum dots

D. D. Bhaktavatsala Rao, Sayantan Ghosh, Prasanta Kumar Panigrahi

Published Oct 24, 2008• 36 citations
arXivHTMLPDF

Abstract

We propose a scheme for generating $N$-qubit entangled states which can teleport an unknown state perfectly. By switching on the exchange interaction $(J)$ between the qubits one can get the desired states periodically. A multielectron quantum dot can be a possible realization for generating such $N$-qubit states with high fidelity. It is shown that, in the limit of $N\ensuremath{\rightarrow}\ensuremath{\infty}$, there exists a unique time $t=\frac{2}{3J}{\mathrm{cos}}^{\ensuremath{-}1}(\ensuremath{-}1∕8)$, where the Hamiltonian dynamics gives the $N$-qubit state that can carry out perfect teleportation. We also discussed the effect of the nuclear spin environment on the entanglement of the $N$-qubit teleportation channels.

DOI
10.1103/physreva.78.042328

Related papers

Quantum dot as a resource for teleportation and state swapping

Keng Wah Choo, L. C. Kwek

We studied the use of quantum dots as a resource for teleportation and investigated how entanglement of the resource would affect the average fidelity of such a process. We then identified a suitable magnetic field, interdot distance, and the temperature to be used to achieve an average fidelity beyond the limit of the classical communication channel. We also explored the effects of decoherence on the teleportation process. We then investigated the state transfer or swapping between two quantum dots. We found that perfect quantum swap is possible in this system. A smaller magnetic field and interdot distance shortened the perfect state transfer time. Finally, we report on the performance of the system under different decoherence models.

Physical Review B•May 14, 2007•9 citations

Perfect Teleportation an Arbitrary Three-particle State

Wei Zhang

A scheme of teleportation of an arbitrary three-qubit state is presented by using the generalized Bell-basis measurement and the Non-Bell-Pair quantum channel.Teleportation can be perfectly realized if Alice makes Bell-state measurement on her particles and Bob carries out appropriate unitary transformation(Toffoli transformation)on his particle.The unknown three-particle entangled state can be teleported perfectly,and the successful possibilities and fidelities of the two schemes both reach unity.Based on the transformation operator,the collapses states can easily obtained and Bob's unitary transformation can also easily given.

ACTA PHOTONICA SINICA•Jan 1, 2009•2 citations

Perfect quantum teleportation and dense coding protocols via the 2N-qubit W state

Mei-Yu Wang, Fengli Yan

In this paper, we investigate perfect quantum teleportation and dense coding by using an 2 N -qubit W state channel. In the quantum teleportation scheme, an unknown N -qubit entangled state can be perfectly teleported. One ebit of entanglement and two bits of classical communication are consumed in the teleportation process, just like when using the Bell state channel. While N + 1 bits of classical information can be transmitted by only sending N particles in the dense coding protocol.

Chinese Physics B•Dec 1, 2011•20 citations

Quantum teleportation scheme by selecting one of multiple output ports

Satoshi Ishizaka, Tohya Hiroshima

The scheme of quantum teleportation, where Bob has multiple $(N)$ output ports and obtains the teleported state by simply selecting one of the $N$ ports, is thoroughly studied. We consider both the deterministic version and probabilistic version of the teleportation scheme aiming to teleport an unknown state of a qubit. Moreover, we consider two cases for each version: (i) the state employed for the teleportation is fixed to a maximally entangled state and (ii) the state is also optimized as well as Alice's measurement. We analytically determine the optimal protocols for all the four cases and show the corresponding optimal fidelity or optimal success probability. All these protocols can achieve the perfect teleportation in the asymptotic limit of $N\ensuremath{\rightarrow}\ensuremath{\infty}$. The entanglement properties of the teleportation scheme are also discussed.

arXiv:0901.2975•Physical Review A•Apr 3, 2009•101 citations

TWO FORMS OF THE THREE-QUBIT STATE FOR PERFECT TELEPORTATION

Xin-Wei Zha, Haiyang Song

Two forms of the three-qubit pure state for teleporting an unknown one-particle entangled state are presented, where the successful possibilities and fidelities of the two schemes both reach one unit. It is worthwhile noticing that GHZ states and W-states are special cases of those two forms of a perfect quantum channel. Furthermore, the orthogonal complete measurement bases are given.

Modern Physics Letters B•Oct 10, 2008•5 citations

Perfect Controlled Multi-Output Teleportation of Single-Qubit States via a High-Dimensional Partially Entangled Channel

Nueraminaimu Maihemuti, Yimamujiang Aisan, Peng Jia-yin +1 more

In practical quantum communication, quantum channels are inevitably affected by noise and decoherence, leading to their degradation into non-maximally entangled or even mixed states. As a result, conventional quantum teleportation schemes based on non-maximally entangled channels are inherently probabilistic and cannot simultaneously achieve unit fidelity and unit success probability. To address this issue, we exploit the structural degrees of freedom of high-dimensional partially entangled channels and construct an asymmetric joint measurement basis matched to the Schmidt-coefficient distribution of the channel, thereby proposing a controlled multi-output perfect quantum teleportation scheme. First, based on a three-dimensional partially entangled five-qutrit channel, a controlled two-output teleportation model for unknown single-qubit states is established. Perfect transmission with both unit fidelity and unit success probability is achieved through the controller’s projective measurement, the sender’s asymmetric joint measurement, and the receivers’ corresponding local recovery operations. On this basis, the scheme is generalized to arbitrary d-dimensional partially entangled channels and further extended from the two-output configuration to the multi-output scenario. Our analysis shows that, when the two largest Schmidt coefficients of the channel are equal, deterministic perfect teleportation with both unit fidelity and unit success probability can still be achieved using non-maximally entangled resources. The proposed scheme is more consistent with realistic quantum communication environments and provides a theoretical foundation for efficient and controllable quantum information distribution in complex quantum networks.

Entropy•Jun 8, 2026•0 citations
We propose a scheme for generating NNN-qubit entangled states which can teleport an unknown state perfectly. By switching on the exchange interaction (J)(J)(J) between the qubits one can get the desired states periodically. A multielectron quantum dot can be a possible realization for generating such NNN-qubit states with high fidelity. It is shown that, in the limit of N\ensuremath→\ensuremath∞N\ensuremath{\rightarrow}\ensuremath{\infty}N\ensuremath→\ensuremath∞, there exists a unique time t=23Jcos\ensuremath−1(\ensuremath−1∕8)t=\frac{2}{3J}{\mathrm{cos}}^{\ensuremath{-}1}(\ensuremath{-}1∕8)t=3J2​cos\ensuremath−1(\ensuremath−1∕8), where the Hamiltonian dynamics gives the NNN-qubit state that can carry out perfect teleportation. We also discussed the effect of the nuclear spin environment on the entanglement of the NNN-qubit teleportation channels.
We studied the use of quantum dots as a resource for teleportation and investigated how entanglement of the resource would affect the average fidelity of such a process. We then identified a suitable magnetic field, interdot distance, and the temperature to be used to achieve an average fidelity beyond the limit of the classical communication channel. We also explored the effects of decoherence on the teleportation process. We then investigated the state transfer or swapping between two quantum dots. We found that perfect quantum swap is possible in this system. A smaller magnetic field and interdot distance shortened the perfect state transfer time. Finally, we report on the performance of the system under different decoherence models.
A scheme of teleportation of an arbitrary three-qubit state is presented by using the generalized Bell-basis measurement and the Non-Bell-Pair quantum channel.Teleportation can be perfectly realized if Alice makes Bell-state measurement on her particles and Bob carries out appropriate unitary transformation(Toffoli transformation)on his particle.The unknown three-particle entangled state can be teleported perfectly,and the successful possibilities and fidelities of the two schemes both reach unity.Based on the transformation operator,the collapses states can easily obtained and Bob's unitary transformation can also easily given.
The scheme of quantum teleportation, where Bob has multiple (N)(N)(N) output ports and obtains the teleported state by simply selecting one of the NNN ports, is thoroughly studied. We consider both the deterministic version and probabilistic version of the teleportation scheme aiming to teleport an unknown state of a qubit. Moreover, we consider two cases for each version: (i) the state employed for the teleportation is fixed to a maximally entangled state and (ii) the state is also optimized as well as Alice's measurement. We analytically determine the optimal protocols for all the four cases and show the corresponding optimal fidelity or optimal success probability. All these protocols can achieve the perfect teleportation in the asymptotic limit of $N\ensuremath{\rightarrow}\ensuremath{\infty}$. The entanglement properties of the teleportation scheme are also discussed.
In practical quantum communication, quantum channels are inevitably affected by noise and decoherence, leading to their degradation into non-maximally entangled or even mixed states. As a result, conventional quantum teleportation schemes based on non-maximally entangled channels are inherently probabilistic and cannot simultaneously achieve unit fidelity and unit success probability. To address this issue, we exploit the structural degrees of freedom of high-dimensional partially entangled channels and construct an asymmetric joint measurement basis matched to the Schmidt-coefficient distribution of the channel, thereby proposing a controlled multi-output perfect quantum teleportation scheme. First, based on a three-dimensional partially entangled five-qutrit channel, a controlled two-output teleportation model for unknown single-qubit states is established. Perfect transmission with both unit fidelity and unit success probability is achieved through the controller’s projective measurement, the sender’s asymmetric joint measurement, and the receivers’ corresponding local recovery operations. On this basis, the scheme is generalized to arbitrary d-dimensional partially entangled channels and further extended from the two-output configuration to the multi-output scenario. Our analysis shows that, when the two largest Schmidt coefficients of the channel are equal, deterministic perfect teleportation with both unit fidelity and unit success probability can still be achieved using non-maximally entangled resources. The proposed scheme is more consistent with realistic quantum communication environments and provides a theoretical foundation for efficient and controllable quantum information distribution in complex quantum networks.