Results 1 - 10 of 295

Strategies for integration of donor electron spin qubits in silicon

by T. Schenkel A, J. A. Liddle A, J. Bokor A, A. Persaud A, S. J. Park A, J. Shangkuan A, C. C. Lo B, S. Kwon C, S. A. Lyon D, A. M. Tyryshkin D, I. W. Rangelow E, Y. Sarov E, D. H. Schneider F, J. Ager A, R. De Sousa G , 2006
"... Spins of electrons bound to donor electrons are attractive candidates for exploration of quantum information processing in silicon. We present results from our development of donor electron spin qubit structures. Donors are placed into isotopically enriched 28Si by ion implantation. The coherence pr ..."
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Spins of electrons bound to donor electrons are attractive candidates for exploration of quantum information processing in silicon. We present results from our development of donor electron spin qubit structures. Donors are placed into isotopically enriched 28Si by ion implantation. The coherence

Coherence of spin qubits in silicon

by A M Tyryshkin, J J L Morton, S C Benjamin, A Ardavan, G A D Briggs, J W Ager, S A Lyon , 2006
"... Given the effectiveness of semiconductor devices for classical computation one is naturally led to consider semiconductor systems for solid state quantum information processing. Semiconductors are particularly suitable where local control of electric fields and charge transport are required. Convent ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
to build one in a semiconductor. One possible approach is to use spins as qubits: of nuclei, of electrons, or both in combination. Long qubit coherence times are a prerequisite for quantum computing, and in this paper we will discuss measurements of spin coherence in silicon. The results are encouraging

FAST TRACK COMMUNICATION Electron dynamics in quantum gate operation

by A Kerridge, A H Harker, A M Stoneham , 2007
"... We model the evolving time-dependent electronic structure of a solid-state quantum gate as it performs basic quantum operations. Our time-dependent configuration-interaction method follows the evolution of two donor electron spin qubits interacting with a third, optically excited, control spin in an ..."
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We model the evolving time-dependent electronic structure of a solid-state quantum gate as it performs basic quantum operations. Our time-dependent configuration-interaction method follows the evolution of two donor electron spin qubits interacting with a third, optically excited, control spin

Decoherence of electron spin qubits in si-based quantum computers, Phys

by Charles Tahan , Mark Friesen , Robert Joynt - Rev. B
"... Direct phonon spin-lattice relaxation of an electron qubit bound by a donor impurity or quantum dot in SiGe heterostructures is investigated. The aim is to evaluate the importance of decoherence from this mechanism in several important solid-state quantum computer designs operating at low temperatu ..."
Abstract - Cited by 4 (2 self) - Add to MetaCart
Direct phonon spin-lattice relaxation of an electron qubit bound by a donor impurity or quantum dot in SiGe heterostructures is investigated. The aim is to evaluate the importance of decoherence from this mechanism in several important solid-state quantum computer designs operating at low

Spin-qubits in Carbon Peapods

by unknown authors
"... Spin chains have the potential to provide the controlled interactions needed for quantum computing. Carbon is a candidate host for spin qubits because in 12C materials the small spin-orbit coupling and absence of hyperfine coupling ensures long spin coherence times. Carbon peapods, that is, single-w ..."
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Spin chains have the potential to provide the controlled interactions needed for quantum computing. Carbon is a candidate host for spin qubits because in 12C materials the small spin-orbit coupling and absence of hyperfine coupling ensures long spin coherence times. Carbon peapods, that is, single

Qubits via Two-Dimensional Electron Gas

by Dima Mozyrsky, Vladimir Privman, M. Lawrence Glasser , 2000
"... We propose a mechanism of long-range coherent coupling between nuclear spins which can be used as qubits in solid-state semiconductor-heterojunction quantum information processing devices. The coupling is via localized donor electrons which in turn interact with the two-dimensional electron gas. An ..."
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We propose a mechanism of long-range coherent coupling between nuclear spins which can be used as qubits in solid-state semiconductor-heterojunction quantum information processing devices. The coupling is via localized donor electrons which in turn interact with the two-dimensional electron gas

Semiconductor Few-Electron Quantum Dots as Spin Qubits

by J. M. Elzerman, R. Hanson, L. H. Willems Van Beveren, S. Tarucha, L. P. Kouwenhoven
"... The spin of an electron placed in a magnetic field provides a natural twolevel system suitable as a qubit in a quantum computer [1]. In this work, we describe the experimental steps we have taken towards using a single electron spin, trapped in a semiconductor quantum dot, as such a spin qubit [2]. ..."
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The spin of an electron placed in a magnetic field provides a natural twolevel system suitable as a qubit in a quantum computer [1]. In this work, we describe the experimental steps we have taken towards using a single electron spin, trapped in a semiconductor quantum dot, as such a spin qubit [2

Anisotropic Hyperfine-Coupled Electron/Nuclear Spin Qubits

by Mohamed Osama, Avid G. Cory, Mohamed Osama Abutaleb , 2010
"... Coherent control is a fundamental challenge in quantum information processing (QIP). Our system of interest employs a local, isolated electron spin to coherently control nuclear spins. Coupled electron/nuclear spins are a promising candidate for QIP: nuclear spins are used for information storage an ..."
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and computation due to their long coherence times, while the electron is used as a spin actuator for initialization, information transfer, control, and readout. This is the first implementation of a local processor using the central qubit architecture. In this work, a robust integrated system for coherent control

Control and fast Measurement of Spin Qubits

by Christian Barthel , 2010
"... This thesis presents experiments on the manipulation, measurement and coherence of an individual spin or of a two-electron spin state in GaAs double quantum dots. Single-spin qubit manipulation is discussed in the first experiment. A novel hyperfine effect on a single spin in a quantum dot is presen ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
This thesis presents experiments on the manipulation, measurement and coherence of an individual spin or of a two-electron spin state in GaAs double quantum dots. Single-spin qubit manipulation is discussed in the first experiment. A novel hyperfine effect on a single spin in a quantum dot

Spin Manipulation and Spin Qubits with Quantum Dots

by S. Tarucha, K. Ono, W. Van Der Wiel, D. G. Austing, L. P. Kouwenhoven
"... Electronic configuration in quantum dots is significantly influenced by the effects of interactions and quantum mechanical confinement. Depneding on the configuration the electron transport properties are modified, and often appear strongly spin-related due to the interaction effects [1]. Observatio ..."
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Electronic configuration in quantum dots is significantly influenced by the effects of interactions and quantum mechanical confinement. Depneding on the configuration the electron transport properties are modified, and often appear strongly spin-related due to the interaction effects [1
Results 1 - 10 of 295