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

中国科学通报：英文版

Concentration and distribution of entanglement based on valley qubits system in graphene

ChuanWang, Weiwei, Si-Chen, Yong, Zhang, Tie-Jun, Wang

Published Jan 1, 2015• 0 citations
OpenAlex

Abstract

在 graphene 量利用光刺激选择规则点，我们理论上调查山谷 qubits 的纠纷产生过程和纠纷集中过程。我们基于 graphene 的量点的协议表演能通过和单个光子的相互作用处于一个最大地纠缠的状态被散布。在我们的建议计划，当仅仅单个光子的察觉被要求，安装被简化。这提供在薄片上 qubits 的快、所有光的操作，它在基于 graphene 的稳固的 qubits 为量信息处理给一个有效方法。

Related papers

Concentration and distribution of entanglement based on valley qubits system in graphene

Chuan Xi Wang, Wei-Wei Shen, Sichen Mi +2 more

中国科学通报：英文版•Nov 25, 2015•43 citations

Hubbard interaction induced non-symmetric spin and pseudo-spin entanglement at different valleys of graphene

Sh. Ahsani, E. Faizi, A. Phirouznia

The European Physical Journal Plus•Feb 20, 2024•1 citation

Optimization of Thermal Quantum Entanglement and Quantum Teleportation Fidelity in Two-Qubit Graphene Lattices Under Polarized Electromagnetic Waves

Fadoua Omari, S. El Asri, S. Mouslih +3 more

Journal of Low Temperature Physics•Feb 3, 2026•1 citation

Quantum coherence and entanglement negativity in AB-stacked bilayer graphene

R. Chkaifa, Hamza Mhamdi, N. Habiballah +2 more

Applied Physics A•Aug 17, 2026•0 citations

Microwave spectroscopy of few-carrier states in bilayer graphene quantum dots

Max J. Ruckriegel, Christoph Adam, Rebecca Bolt +8 more

Bilayer graphene is a maturing material platform for gate-defined quantum dots that hosts long-lived spin and valley states. Implementing solid-state qubits in bilayer graphene requires a fundamental understanding of such confined electronic systems. In particular, states of two and three carriers, for which the exchange interaction between particles plays a crucial role, are a cornerstone for qubit readout and manipulation. Here we report on the spectroscopy of few-carrier states in bilayer graphene quantum dots, using circuit quantum electrodynamics (cQED) techniques that offer substantially improved energy resolution compared to standard transport techniques. Measurements using a superconducting high-impedance resonator capacitively coupled to the double quantum dot reveal dispersive features of two and three electron states, enabling the detection of Pauli spin and valley blockade and the characterization of the spin-orbit gap at zero magnetic field. The results deepen our understanding of few-carrier spin and valley states in bilayer graphene quantum dots and demonstrate that cQED techniques are a powerful state-selective probe for semiconductor nanostructures.

cond-mat.mes-hallCross-listedarXiv:2511.20185•Nov 26, 2025

Pairwise thermal quantum resources in graphene-based qubits under polarized laser driving

Zakaria Bouafia, Zakaria Dahbi, Mostafa Mansour

Abstract We investigate the dynamics of entanglement and quantum coherence between the pseudospin and valley indices of individual electrons in two-dimensional graphene, thermalized at an equilibrium temperature T . The system is modeled by an effective Dirac-like Hamiltonian describing a graphene valley-pseudospin qubit under polarized laser driving, including sublattice-dependent scattering process, while the thermal fluctuations are accounted through the standard Gibbs thermal state. Entanglement between the two degrees of liberty of electrons is quantified using concurrence, and coherence with the system is measured employing the relative entropy of coherence. The findings demonstrate that the behavior of entanglement and coherence under thermal noise strongly depends on the scattering strength, wavevector components, and electromagnetic field. Additionally, our results indicate that the strong polarized fields ( ξ 0 = 8 meV 2 ) with low-frequency ( ω = 0.06 eV ) can be employed to enhance the robustness of thermal entanglement and coherence of the system at intermediate temperatures. We also explore the impact of the other system parameters, like scattering strength and wavevector components, in enhancing and preserving quantum resources within graphene-based systems, noting particularly that the relative entropy of coherence is more resilient than concurrence against thermal decoherence.

Physica Scripta•Jun 2, 2026•0 citations
在 graphene 量利用光刺激选择规则点，我们理论上调查山谷 qubits 的纠纷产生过程和纠纷集中过程。我们基于 graphene 的量点的协议表演能通过和单个光子的相互作用处于一个最大地纠缠的状态被散布。在我们的建议计划，当仅仅单个光子的察觉被要求，安装被简化。这提供在薄片上 qubits 的快、所有光的操作，它在基于 graphene 的稳固的 qubits 为量信息处理给一个有效方法。
Bilayer graphene is a maturing material platform for gate-defined quantum dots that hosts long-lived spin and valley states. Implementing solid-state qubits in bilayer graphene requires a fundamental understanding of such confined electronic systems. In particular, states of two and three carriers, for which the exchange interaction between particles plays a crucial role, are a cornerstone for qubit readout and manipulation. Here we report on the spectroscopy of few-carrier states in bilayer graphene quantum dots, using circuit quantum electrodynamics (cQED) techniques that offer substantially improved energy resolution compared to standard transport techniques. Measurements using a superconducting high-impedance resonator capacitively coupled to the double quantum dot reveal dispersive features of two and three electron states, enabling the detection of Pauli spin and valley blockade and the characterization of the spin-orbit gap at zero magnetic field. The results deepen our understanding of few-carrier spin and valley states in bilayer graphene quantum dots and demonstrate that cQED techniques are a powerful state-selective probe for semiconductor nanostructures.
Abstract We investigate the dynamics of entanglement and quantum coherence between the pseudospin and valley indices of individual electrons in two-dimensional graphene, thermalized at an equilibrium temperature T . The system is modeled by an effective Dirac-like Hamiltonian describing a graphene valley-pseudospin qubit under polarized laser driving, including sublattice-dependent scattering process, while the thermal fluctuations are accounted through the standard Gibbs thermal state. Entanglement between the two degrees of liberty of electrons is quantified using concurrence, and coherence with the system is measured employing the relative entropy of coherence. The findings demonstrate that the behavior of entanglement and coherence under thermal noise strongly depends on the scattering strength, wavevector components, and electromagnetic field. Additionally, our results indicate that the strong polarized fields ( ξ 0 = 8 meV 2 ) with low-frequency ( ω = 0.06 eV ) can be employed to enhance the robustness of thermal entanglement and coherence of the system at intermediate temperatures. We also explore the impact of the other system parameters, like scattering strength and wavevector components, in enhancing and preserving quantum resources within graphene-based systems, noting particularly that the relative entropy of coherence is more resilient than concurrence against thermal decoherence.