Time-resolved detection of single-electron interference

被引：48

作者：

Gustavsson, S. ^{[1
]}

Leturcq, R. ^{[1
]}

Studer, M. ^{[1
]}

Ihn, T. ^{[1
]}

Ensslin, K. ^{[1
]}

Driscoll, D. C. ^{[2
]}

Gossard, A. C. ^{[2
]}

机构：

[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 08期

关键词：

D O I：

10.1021/nl801689t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate real-time detection of self-interfering electrons in a double quantum dot embedded in an Aharonov-Bohm interferometer, with visibility approaching unity. We use a quantum point contact as a charge detector to perform time-resolved measurements of single-electron tunneling. With increased bias voltage, the quantum point contact exerts a back-action on the interferometer leading to decoherence. We attribute this to emission of radiation from the quantum point contact, which drives noncoherent electronic transitions in the quantum dots.

引用

页码：2547 / 2550

页数：4

共 30 条

[1] SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY [J].

AHARONOV, Y ;

BOHM, D .

PHYSICAL REVIEW, 1959, 115 (03) :485-491

[2] Quasiparticle lifetime in a finite system: A nonperturbative approach [J].

Altshuler, BL ;

Gefen, Y ;

Kamenev, A ;

Levitov, LS .

PHYSICAL REVIEW LETTERS, 1997, 78 (14) :2803-2806

[3] Wave-particle duality of C60 molecules [J].

Arndt, M ;

Nairz, O ;

Vos-Andreae, J ;

Keller, C ;

van der Zouw, G ;

Zeilinger, A .

NATURE, 1999, 401 (6754) :680-682

[4]

AVERIN DV, 1992, SINGLE CHARGE TUNNEL

[5] Dephasing in electron interference by a 'which-path' detector [J].

Buks, E ;

Schuster, R ;

Heiblum, M ;

Mahalu, D ;

Umansky, V .

NATURE, 1998, 391 (6670) :871-874

[6] Differential charge sensing and charge delocalization in a tunable double quantum dot [J].

DiCarlo, L ;

Lynch, HJ ;

Johnson, AC ;

Childress, LI ;

Crockett, K ;

Marcus, CM ;

Hanson, MP ;

Gossard, AC .

PHYSICAL REVIEW LETTERS, 2004, 92 (22) :226801-1

[7] Dephasing times in closed quantum dots [J].

Eisenberg, E ;

Held, K ;

Altshuler, BL .

PHYSICAL REVIEW LETTERS, 2002, 88 (13) :4-136801

[8] MEASUREMENTS OF COULOMB BLOCKADE WITH A NONINVASIVE VOLTAGE PROBE [J].

FIELD, M ;

SMITH, CG ;

PEPPER, M ;

RITCHIE, DA ;

FROST, JEF ;

JONES, GAC ;

HASKO, DG .

PHYSICAL REVIEW LETTERS, 1993, 70 (09) :1311-1314

[9] Electronic properties of nanostructures defined in Ga[Al]As heterostructures by local oxidation [J].

Fuhrer, A ;

Dorn, A ;

Lüscher, S ;

Heinzel, T ;

Ensslin, K ;

Wegscheider, W ;

Bichler, M .

SUPERLATTICES AND MICROSTRUCTURES, 2002, 31 (01) :19-42

[10] Electron counting of single-electron tunneling current [J].

Fujisawa, T ;

Hayashi, T ;

Hirayama, Y ;

Cheong, HD ;

Jeong, YH .

APPLIED PHYSICS LETTERS, 2004, 84 (13) :2343-2345

← 1 2 3 →