Orbital quantum bit in Si quantum dots

D. Ahn; S. W. Hwnag

doi:10.1109/NMDC.2006.4388706

Orbital quantum bit in Si quantum dots

D. Ahn, S. W. Hwnag

School of Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In this paper, current status of experimental and theoretical work on quantum bits based on the semiconductor quantum dots in the University of Seoul will be presented. A new proposal utilizing the multi-valley quantum state transitions in a Si quantum dot as a possible candidate for a quantum bit with a long decoherence time will be also given. Qubits are the multi-valley symmetric and anti-symmetric orbitais. Evolution of these orbitais is controlled by an external electric field, which turns on and off the inter-valley interactions. Initialization is achieved by turning on the inter-valley Hamiltonian to let the system settle down to the symmetric orbital state. Estimates of the decoherence time is made for the longitudinal acoustic phonon process.

Original language	English
Title of host publication	2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Pages	104-107
Number of pages	4
DOIs	https://doi.org/10.1109/NMDC.2006.4388706
State	Published - 2006
Event	2006 IEEE Nanotechnology Materials and Devices Conference, NMDC - Gyeongju, Korea, Republic of Duration: 22 Oct 2006 → 25 Oct 2006

Publication series

Name	2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Volume	1

Conference

Conference	2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Country/Territory	Korea, Republic of
City	Gyeongju
Period	22/10/06 → 25/10/06

Keywords

Inter-valley interactions
Obital quantum bits
Si quantum dots

Access to Document

10.1109/NMDC.2006.4388706

Cite this

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title = "Orbital quantum bit in Si quantum dots",

abstract = "In this paper, current status of experimental and theoretical work on quantum bits based on the semiconductor quantum dots in the University of Seoul will be presented. A new proposal utilizing the multi-valley quantum state transitions in a Si quantum dot as a possible candidate for a quantum bit with a long decoherence time will be also given. Qubits are the multi-valley symmetric and anti-symmetric orbitais. Evolution of these orbitais is controlled by an external electric field, which turns on and off the inter-valley interactions. Initialization is achieved by turning on the inter-valley Hamiltonian to let the system settle down to the symmetric orbital state. Estimates of the decoherence time is made for the longitudinal acoustic phonon process.",

keywords = "Inter-valley interactions, Obital quantum bits, Si quantum dots",

author = "D. Ahn and Hwnag, {S. W.}",

year = "2006",

doi = "10.1109/NMDC.2006.4388706",

language = "English",

isbn = "1424405408",

series = "2006 IEEE Nanotechnology Materials and Devices Conference, NMDC",

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}

Ahn, D & Hwnag, SW 2006, Orbital quantum bit in Si quantum dots. in 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC., 4388706, 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC, vol. 1, pp. 104-107, 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC, Gyeongju, Korea, Republic of, 22/10/06. https://doi.org/10.1109/NMDC.2006.4388706

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N2 - In this paper, current status of experimental and theoretical work on quantum bits based on the semiconductor quantum dots in the University of Seoul will be presented. A new proposal utilizing the multi-valley quantum state transitions in a Si quantum dot as a possible candidate for a quantum bit with a long decoherence time will be also given. Qubits are the multi-valley symmetric and anti-symmetric orbitais. Evolution of these orbitais is controlled by an external electric field, which turns on and off the inter-valley interactions. Initialization is achieved by turning on the inter-valley Hamiltonian to let the system settle down to the symmetric orbital state. Estimates of the decoherence time is made for the longitudinal acoustic phonon process.

AB - In this paper, current status of experimental and theoretical work on quantum bits based on the semiconductor quantum dots in the University of Seoul will be presented. A new proposal utilizing the multi-valley quantum state transitions in a Si quantum dot as a possible candidate for a quantum bit with a long decoherence time will be also given. Qubits are the multi-valley symmetric and anti-symmetric orbitais. Evolution of these orbitais is controlled by an external electric field, which turns on and off the inter-valley interactions. Initialization is achieved by turning on the inter-valley Hamiltonian to let the system settle down to the symmetric orbital state. Estimates of the decoherence time is made for the longitudinal acoustic phonon process.

KW - Inter-valley interactions

KW - Obital quantum bits

KW - Si quantum dots

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BT - 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC

T2 - 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC

Y2 - 22 October 2006 through 25 October 2006

ER -

Orbital quantum bit in Si quantum dots

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Keywords

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