The influence of environmental coupling on phase breaking in open quantum dots

J. P. Bird; A. P. Micolich; D. K. Ferry; R. Akis; Y. Ochiai; Y. Aoyagi; T. Sugano

doi:10.1016/S0038-1101(98)00017-3

The influence of environmental coupling on phase breaking in open quantum dots

J. P. Bird, A. P. Micolich, D. K. Ferry, R. Akis, Y. Ochiai, Y. Aoyagi, T. Sugano

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Studies of the phase breaking time in open quantum dots reveal a value of the order of a few tens of picoseconds at low resistances, which increases by as much as one order of magnitude as the quantum point contact leads are narrowed to support just a few modes. In addition, the value of the phase breaking time in the high resistance regime shows considerable device dependent variations, indicative of a sensitivity of phase coherence to device dependent disorder. In order to account for these observations, we suggest an interpretation of phase breaking which invokes the discrete nature of the level spectrum in the open dots and which emphasizes the role of the quantum point contacts in selectively exciting dot eigenstates.

Original language	English (US)
Pages (from-to)	1281-1285
Number of pages	5
Journal	Solid-State Electronics
Volume	42
Issue number	7-8
DOIs	https://doi.org/10.1016/S0038-1101(98)00017-3
State	Published - 1998

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/S0038-1101(98)00017-3

Cite this

@article{113d1976e4e7455bb20728b68782a86f,

title = "The influence of environmental coupling on phase breaking in open quantum dots",

abstract = "Studies of the phase breaking time in open quantum dots reveal a value of the order of a few tens of picoseconds at low resistances, which increases by as much as one order of magnitude as the quantum point contact leads are narrowed to support just a few modes. In addition, the value of the phase breaking time in the high resistance regime shows considerable device dependent variations, indicative of a sensitivity of phase coherence to device dependent disorder. In order to account for these observations, we suggest an interpretation of phase breaking which invokes the discrete nature of the level spectrum in the open dots and which emphasizes the role of the quantum point contacts in selectively exciting dot eigenstates.",

author = "Bird, {J. P.} and Micolich, {A. P.} and Ferry, {D. K.} and R. Akis and Y. Ochiai and Y. Aoyagi and T. Sugano",

year = "1998",

doi = "10.1016/S0038-1101(98)00017-3",

language = "English (US)",

volume = "42",

pages = "1281--1285",

journal = "Solid-State Electronics",

issn = "0038-1101",

publisher = "Elsevier Limited",

number = "7-8",

}

TY - JOUR

T1 - The influence of environmental coupling on phase breaking in open quantum dots

AU - Bird, J. P.

AU - Micolich, A. P.

AU - Ferry, D. K.

AU - Akis, R.

AU - Ochiai, Y.

AU - Aoyagi, Y.

AU - Sugano, T.

PY - 1998

Y1 - 1998

N2 - Studies of the phase breaking time in open quantum dots reveal a value of the order of a few tens of picoseconds at low resistances, which increases by as much as one order of magnitude as the quantum point contact leads are narrowed to support just a few modes. In addition, the value of the phase breaking time in the high resistance regime shows considerable device dependent variations, indicative of a sensitivity of phase coherence to device dependent disorder. In order to account for these observations, we suggest an interpretation of phase breaking which invokes the discrete nature of the level spectrum in the open dots and which emphasizes the role of the quantum point contacts in selectively exciting dot eigenstates.

AB - Studies of the phase breaking time in open quantum dots reveal a value of the order of a few tens of picoseconds at low resistances, which increases by as much as one order of magnitude as the quantum point contact leads are narrowed to support just a few modes. In addition, the value of the phase breaking time in the high resistance regime shows considerable device dependent variations, indicative of a sensitivity of phase coherence to device dependent disorder. In order to account for these observations, we suggest an interpretation of phase breaking which invokes the discrete nature of the level spectrum in the open dots and which emphasizes the role of the quantum point contacts in selectively exciting dot eigenstates.

UR - http://www.scopus.com/inward/record.url?scp=0032120734&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032120734&partnerID=8YFLogxK

U2 - 10.1016/S0038-1101(98)00017-3

DO - 10.1016/S0038-1101(98)00017-3

M3 - Article

AN - SCOPUS:0032120734

SN - 0038-1101

VL - 42

SP - 1281

EP - 1285

JO - Solid-State Electronics

JF - Solid-State Electronics

IS - 7-8

ER -

The influence of environmental coupling on phase breaking in open quantum dots

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this