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International Journal of Theoretical Physics

Controllable Quantum State Transfer Between a Josephson Charge Qubit and an Electronic Spin Ensemble

Run‐Ying Yan, Hongling Wang, Zhi‐Bo Feng

Published May 2, 2015• 2 citations
Publisher
DOI
10.1007/s10773-015-2658-3

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Preface Spin and Charge Qubits 1. Coded Qubit Based on Electron Spin M. Korkusinski and P. Hawrylak 2. Quantum Optical Studies of Single Coupled Quantum Dot Pairs G. J. Beirne, M. Jetter, and P. Michler 3. Nuclear Spin Bi-stability in Semiconductor Quantum Dots A. I. Tartakovskii, M. S. Skolnick, A. Russell, and V. I. Fal'ko 4. Nonequilibrium Optical Spin Cooling in Charged Quantum Dots I. A. Akimov, D. H. Feng, and F. Henneberger Qubit Control, Readout, and Transfer 5. Electron Spin Quantum Bits in Quantum Dots: Initialization, Decoherence, and Control A. Greilich, D. R. Yakovlev, M. Bayer, A. Shabaev, and A. L. Efros 6. Optical Control of Quantum-Dot Spin States M. Atat ure, J. Dreiser, A. Badolato, and A. Imamo_glu 7. Optical Read-out of Single Carrier Spin in Semiconductor Quantum Dots F. Troiani, I. Wilson-Rae, and C. Tejedor 8. Quantum State Transfer from a Photon to an Electron Spin in Quantum Dots and Quantum Dynamics of Electron-Nuclei Coupled System T. Takagahara and O. ^ Cakir Qubit Decoherence 9. Spin Quantum-bits and Decoherence in InAs/GaAs Quantum Dots B. Urbaszek, T. Amand, O. Krebs, P. Renucci, and X. Marie 10. Electron and Hole Spin Dynamics and Decoherence in Quantum Dots D. Klauser, D. V. Bulaev, W. A. Coish, and D. Loss 11. Microscopic Theory of Energy Dissipation and Decoherence in Semiconductor Nanodevices F. Rossi 12. Transient Four-wave Mixing of Excitons in Quantum Dots from Ensembles and Individuals P. Borri and W. Langbein Flying Qubits 13. Light-matter Interaction in Single Quantum Dot - Micropillar Cavity Systems S. Reitzenstein, J.-P. Reithmaier, and A. Forchel 14. Entangled Photons via Biexciton-Resonant Hyperparemetric Scattering K. Edamatsu 15. Entangled Photon Pair Emission and Interference from Single Quantum Dots R. M. Stevenson, R. J. Young, and A. J. Shields Qubit Applications 16. Telecom-wavelength Single-photon Sources Based on Single Quantum Dots M. B. Ward, A. J. Shields, B. Alloing, C. Zinoni, C. Monat, and A. Fiore 17. Quantum Information Processing with Quantum Dots in Photonic Crystals J. Vu_ckovi_c, D. Englund, A. Faraon, I. Fushman, and E. Waks 18. High-Speed Quantum Computers with Semiconductor Spins T. D. Ladd, K. Sanaka, K. M. C. Fu, S. Koseki, D. Press, S. M. Clark, K. De Greve, and Y. Yamamoto 19. Quantum Dots: Single-Photon Sources for Quantum Information M. Scholz, T. Aichele, and O. Benson Author Index Subject Index

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Quantum State Transfer with Tunable Couplings for Superconducting Qubits

Long-Bao Yu, Jun Liu, Ping Dong +1 more

International Journal of Theoretical Physics•Sep 25, 2012•1 citation
We propose a scheme to control the coupling between the charge qubit and the nitrogen-vacancy center ensemble (NVCE). The coupling is mediated by a large Josephson junction (JJ) and a flux qubit. The large JJ can be treated classically and behaves like an effective inductance to switch the coupling between the charge and flux qubits. The flux qubit serves as a bridge to couple the NVCE and the charge qubit, and quantum state transfer can be implemented, with the NVCE acting as a memory unit. The hybrid circuit can reinforce various advantages: controllability of the charge qubit and robust spin coherence of the NVCE.
A type of Josephson charge qubit circuit is constructed in this paper, and properties of four-qubit quantum state transfer through this system is also investigated. By modulating the external magnetic flux, we show that ideal transfer of an excited state 1〉 from the first qubit to the fourth qubit can be realized for both homogeneous and inhomogeneous transmission channels. Moreover, the average fidelity of state transfer across this system is also analyzed, the result revealed that it cannot be used to transfer an arbitrary quantum state.
Preface Spin and Charge Qubits 1. Coded Qubit Based on Electron Spin M. Korkusinski and P. Hawrylak 2. Quantum Optical Studies of Single Coupled Quantum Dot Pairs G. J. Beirne, M. Jetter, and P. Michler 3. Nuclear Spin Bi-stability in Semiconductor Quantum Dots A. I. Tartakovskii, M. S. Skolnick, A. Russell, and V. I. Fal'ko 4. Nonequilibrium Optical Spin Cooling in Charged Quantum Dots I. A. Akimov, D. H. Feng, and F. Henneberger Qubit Control, Readout, and Transfer 5. Electron Spin Quantum Bits in Quantum Dots: Initialization, Decoherence, and Control A. Greilich, D. R. Yakovlev, M. Bayer, A. Shabaev, and A. L. Efros 6. Optical Control of Quantum-Dot Spin States M. Atat ure, J. Dreiser, A. Badolato, and A. Imamo_glu 7. Optical Read-out of Single Carrier Spin in Semiconductor Quantum Dots F. Troiani, I. Wilson-Rae, and C. Tejedor 8. Quantum State Transfer from a Photon to an Electron Spin in Quantum Dots and Quantum Dynamics of Electron-Nuclei Coupled System T. Takagahara and O. ^ Cakir Qubit Decoherence 9. Spin Quantum-bits and Decoherence in InAs/GaAs Quantum Dots B. Urbaszek, T. Amand, O. Krebs, P. Renucci, and X. Marie 10. Electron and Hole Spin Dynamics and Decoherence in Quantum Dots D. Klauser, D. V. Bulaev, W. A. Coish, and D. Loss 11. Microscopic Theory of Energy Dissipation and Decoherence in Semiconductor Nanodevices F. Rossi 12. Transient Four-wave Mixing of Excitons in Quantum Dots from Ensembles and Individuals P. Borri and W. Langbein Flying Qubits 13. Light-matter Interaction in Single Quantum Dot - Micropillar Cavity Systems S. Reitzenstein, J.-P. Reithmaier, and A. Forchel 14. Entangled Photons via Biexciton-Resonant Hyperparemetric Scattering K. Edamatsu 15. Entangled Photon Pair Emission and Interference from Single Quantum Dots R. M. Stevenson, R. J. Young, and A. J. Shields Qubit Applications 16. Telecom-wavelength Single-photon Sources Based on Single Quantum Dots M. B. Ward, A. J. Shields, B. Alloing, C. Zinoni, C. Monat, and A. Fiore 17. Quantum Information Processing with Quantum Dots in Photonic Crystals J. Vu_ckovi_c, D. Englund, A. Faraon, I. Fushman, and E. Waks 18. High-Speed Quantum Computers with Semiconductor Spins T. D. Ladd, K. Sanaka, K. M. C. Fu, S. Koseki, D. Press, S. M. Clark, K. De Greve, and Y. Yamamoto 19. Quantum Dots: Single-Photon Sources for Quantum Information M. Scholz, T. Aichele, and O. Benson Author Index Subject Index