Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays

Liu, Siping; Yu, Rong; Li, Jiahua; Wu, Ying

doi:10.1063/1.4870450

Title: Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays

Full Record
Other Related Research

Abstract

Generating entangled states attract tremendous interest as the most vivid manifestation of nonlocality of quantum mechanics and also for emerging applications in quantum information processing (QIP). Here, we propose theoretically a scheme for the deterministic generation of a three-qubit W sate with three semiconductor quantum-dot-molecules (QDMs) trapped in spatially separated cavities connected by optical fibers. The proposed scheme takes full advantage of the voltage-controlled tunnelling effects in QDMs, which induces the quantum coherence and further controls the generation of the W entangled state. The influences of the system parameters and various decoherence processes including spontaneous decay and photon leakage on the fidelity of the W state are discussed in details. Numerical results indicate that our scheme is not only robust against these decoherence factors but also insensitive to the deviation of the system parameters from the ideal conditions. Furthermore, the present scheme can be directly extended to realize an N-qubit W state. Also, this scheme can be generically transferred to other physical systems, including circuit quantum electrodynamics and photonic crystal cavities. The results obtained here may be useful in real experiments for realizing QIP in a solid-state platform.

Authors:

Liu, Siping ^[1]; Yu, Rong ^[2]; Li, Jiahua ^[1]; Wu, Ying ^[1]

Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)
Wuhan Institute of Technology, School of Science, Hubei Province Key Laboratory of Intelligent Robot, Wuhan 430073 (China)

Publication Date:: Mon Apr 07 00:00:00 EDT 2014

OSTI Identifier:: 22273678

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 115; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 77 NANOSCIENCE AND NANOTECHNOLOGY; CAVITY RESONATORS; CRYSTALS; ELECTRIC POTENTIAL; MOLECULES; OPTICAL FIBERS; PHOTONS; QUANTUM DOTS; QUANTUM ELECTRODYNAMICS; QUANTUM ENTANGLEMENT; QUANTUM MECHANICS; QUANTUM STATES; QUBITS; SEMICONDUCTOR MATERIALS; SOLIDS; TRAPPING; TUNNEL EFFECT

Citation Formats


                    Liu, Siping, School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang 441053, Yu, Rong, Li, Jiahua, Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074, and Wu, Ying. Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4870450.

Copy to clipboard


                    Liu, Siping, School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang 441053, Yu, Rong, Li, Jiahua, Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074, & Wu, Ying. Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays.  United States.  https://doi.org/10.1063/1.4870450

Copy to clipboard


                    Liu, Siping, School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang 441053, Yu, Rong, Li, Jiahua, Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074, and Wu, Ying. 2014.  
        "Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays".  United States.  https://doi.org/10.1063/1.4870450.

Copy to clipboard


                    
@article{osti_22273678,

  title        = {Generation of a multi-qubit W entangled state through spatially separated semiconductor quantum-dot-molecules in cavity-quantum electrodynamics arrays},

  author       = {Liu, Siping and School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang 441053 and Yu, Rong and Li, Jiahua and Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074 and Wu, Ying},

  abstractNote = {Generating entangled states attract tremendous interest as the most vivid manifestation of nonlocality of quantum mechanics and also for emerging applications in quantum information processing (QIP). Here, we propose theoretically a scheme for the deterministic generation of a three-qubit W sate with three semiconductor quantum-dot-molecules (QDMs) trapped in spatially separated cavities connected by optical fibers. The proposed scheme takes full advantage of the voltage-controlled tunnelling effects in QDMs, which induces the quantum coherence and further controls the generation of the W entangled state. The influences of the system parameters and various decoherence processes including spontaneous decay and photon leakage on the fidelity of the W state are discussed in details. Numerical results indicate that our scheme is not only robust against these decoherence factors but also insensitive to the deviation of the system parameters from the ideal conditions. Furthermore, the present scheme can be directly extended to realize an N-qubit W state. Also, this scheme can be generically transferred to other physical systems, including circuit quantum electrodynamics and photonic crystal cavities. The results obtained here may be useful in real experiments for realizing QIP in a solid-state platform.},

  doi          = {10.1063/1.4870450},

  url          = {https://www.osti.gov/biblio/22273678},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 13,

  volume       = 115,

  place        = {United States},

  year         = {Mon Apr 07 00:00:00 EDT 2014},

  month        = {Mon Apr 07 00:00:00 EDT 2014}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.4870450

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Optical detection and storage of entanglement in plasmonically coupled quantum-dot qubits

Journal Article Otten, M.; Gray, S.; Kolmakov, G. - Physical Review A

Recent proposals and advances in quantum simulations, quantum cryptography, and quantum communications substantially rely on quantum entanglement formation. Contrary to the conventional wisdom that dissipation destroys quantum coherence, coupling with a dissipative environment can also generate entanglement. We consider a system composed of two quantum-dot qubits coupled with a common, damped surface plasmon mode; each quantum dot is also coupled to a separate photonic cavity mode. Cavity quantum electrodynamics calculations show that upon optical excitation by a femtosecond laser pulse, entanglement of the quantum-dot excitons occurs, and the time evolution of the g⁽²⁾ pair correlation function of the cavity photonsmore »« less
Cited by 8
https://doi.org/10.1103/PhysRevA.99.032339

Full Text Available
Preparation of entangled states of four remote atomic qubits in decoherence-free subspace

Journal Article Deng, Z; Feng, M; Gao, K - Physical Review. A

We propose how to prepare four remote logical qubits, with each in a separate cavity and encoded in the decoherence-free subspace by two atoms, into various entangled states. By means of the cavity-assisted photon scattering, we can link the four remote logical qubits in different cavities to be, respectively, W state, Greenberger-Horne-Zeilinger state, and cluster state, which are important in view of the distributed quantum information processing. The generation of the latter two entangled states can be theoretically generalized to many-qubit cases. Because our qubits are defined in dephasing-free subspace, our scheme is immune to dephasing during or even aftermore » the entanglement preparation.« less
https://doi.org/10.1103/PHYSREVA.75.024302
Quantum-information processing and multiatom-entanglement engineering with a thermal cavity

Journal Article Shibiao, Zheng - Physical Review. A

We propose a scheme for realizing two-qubit quantum phase gates with atoms in a thermal cavity. The photon-number-dependent parts in the evolution operator are canceled with the assistant of a strong classical field. Thus the scheme is insensitive to the thermal field. In the scheme the detuning between the atoms and the cavity is equal to the atom-cavity coupling strength and thus the gates operate at a high speed, which is also important in view of decoherence. The scheme can be generalized to generate multiatom-entangled states with a thermal cavity.
https://doi.org/10.1103/PhysRevA.66.060303
Voltage-controlled entanglement and quantum-information transfer between spatially separated quantum-dot molecules

Journal Article Xinyou, Lue; Lili, Zheng; Wu, Jing; ... - Physical Review. A

We propose two schemes for generating entanglement and quantum-state transfer (QST) between two spatially separated semiconductor quantum dot molecules (QDMs) based on voltage-controlled tunneling effects. In the present schemes, two QDMs are trapped in two spatially separated cavities connected by a fiber. By numerically simulating the evolution of the system, we show that the generation of entanglement and QST can be controlled by an external gate voltage in our schemes. Moreover, proposed schemes are robust against the noise of system parameters.
https://doi.org/10.1103/PHYSREVA.83.042302
Entangled coherent states versus entangled photon pairs for practical quantum-information processing

Journal Article Park, Kimin; Jeong, Hyunseok - Physical Review. A

We compare effects of decoherence and detection inefficiency on entangled coherent states (ECSs) and entangled photon pairs (EPPs), both of which are known to be particularly useful for quantum-information processing (QIP). When decoherence effects caused by photon losses are heavy, the ECSs outperform the EPPs as quantum channels for teleportation both in fidelities and in success probabilities. On the other hand, when inefficient detectors are used, the teleportation scheme using the ECSs suffers undetected errors that result in the degradation of fidelity, while this is not the case for the teleportation scheme using the EPPs. Our study reveals the meritsmore »« less
https://doi.org/10.1103/PHYSREVA.82.062325

Similar Records