Abstract
We introduce an adiabatic long-range quantum communication proposal based on a quantum dot array. By adiabatically varying the external gate voltage applied on the system, the quantum information encoded in the electron can be transported from one end dot to another. We numerically solve the schrödinger equation for a system with a given number of quantum dots. It is shown that this scheme is a simple and efficient protocol to coherently manipulate the population transfer under suitable gate pulses. The dependence of the energy gap and the transfer time on system parameters is analyzed and shown numerically. We also investigate the adiabatic passage in a more realistic system in the presence of inevitable fabrication imperfections. This method provides guidance for future realizations of adiabatic quantum state transfer in experiments.
Similar content being viewed by others
References
Bose S. Quantum communication through an unmodulated spin chain. Phys Rev lett, 2003, 91: 207901
Song Z, Sun C P. Quantum information storage and state transfer based on spin systems. Low Temp Phys, 2005, 31: 686–695
Christandl M, Datta N, Ekert A, et al. Perfect state transfer in quantum spin networks. Phys Rev Lett, 2004, 92: 187902
Eckert K, Lewenstein M, Corbal R, et al. Three-level atom optics via the tunneling interaction. Phys Rev A, 2004, 70: 023606
Greentree A D, Cole J H, Hamilton A R, et al. Coherent electronic transfer in quantum dot systems using adiabatic passage. Phys Rev B, 2004, 70: 235317
Vitanov N V, Halfmann T, Shore B W, et al. Laser-induced polulation transfer by adiabatic passage techniques. Annu Rev Phys Chem, 2001, 52: 763–809
Eckert K, Mompart J, Corbalan R, et al. Three level atom optics in dipole traps and waveguides. Opt Commun, 2006, 264: 264–270
Opatrny T, Das K K. Conditions for vanishing central-well population in triple-well adiabatic transport. Phys Rev A, 2009, 79: 012113
Ohshima T, Ekert A, Oi D K L, et al. Robust state transfer and rotation through a spin chain via dark passage. arXiv: quant-ph/0702019
Zhang P, Xue Q K, Zhao X G, et al. Generation of spatially separated spin entanglement in a triple-quantum-dot system. Phys Rev A, 2004, 69: 042307
Fabian J, Hohenester U. Entanglement distillation by adiabatic passage in coupled quantum dots. Phys Rev B, 2005, 72: 201304 (R)
Graefe E M, Korsch H J, Witthaut D. Mean-field dynamics of a Bose-Einstein condensate in a time-dependent triple-well trap: Nonlinear eigenstates, Landau-Zener models, and stimulated Raman adiabatic passage. Phys Rev A, 2006, 73: 013617
Rab M, Cole J H, Parker N G, et al. Spatial coherent transport of interacting dilute Bose gases. Phys Rev A, 2008, 77: 061602 (R)
Nesterenko V O, Nikonov A N, de Souza Cruz F F, et al. STIRAP transport of Bose-Einstein condensate in triple-well trap. Laser Phys, 2009, 19: 616–624
Hollenberg L C L, Greentree A D, Fowler A G, et al. Two-dimensional architectures for donor-based quantum computing. Phys Rev B, 2006, 74: 045311
Greentree A D, Devitt S J, Hollenberg L C L. Quantum-information transport to multiple receivers. Phys Rev A, 2006, 73: 032319
Chen B, Fan W, Xu Y. Adiabatic quantum state transfer in a nonuniform triple-quantum-dot system. Phys Rev A, 2011, 83: 014301
Cheng J, Zhou J Y. Ultrafast population transfer in three-level ? systems driven by few-cycle laser pulses. Phys Rev A, 2001, 64: 065402
Goswami D. Optical pulse shaping approaches to coherent control. Phys Rep, 2003, 374: 385–481
Hollenberg L C L, Greentree A D, Fowler A G, et al. Two-dimensional architectures for donor-based quantum computing. Phys Rev B, 2006, 74: 045311
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Chen, B., Shen, Q., Fan, W. et al. Long-range adiabatic quantum state transfer through a linear array of quantum dots. Sci. China Phys. Mech. Astron. 55, 1635–1640 (2012). https://doi.org/10.1007/s11433-012-4841-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11433-012-4841-3