Enhanced charge detection of spin qubit readout via an intermediate state

被引：44

作者：

Studenikin, S. A. ^{[1
]}

Thorgrimson, J. ^{[1
,2
]}

Aers, G. C. ^{[1
]}

Kam, A. ^{[1
]}

Zawadzki, P. ^{[1
]}

Wasilewski, Z. R. ^{[1
]}

Bogan, A. ^{[1
,3
]}

Sachrajda, A. S. ^{[1
]}

机构：

[1] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada

[2] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[3] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 23期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.4749281

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We employ an intermediate excited charge state of a lateral quantum dot device to increase the charge detection contrast during the qubit state readout procedure, allowing us to increase the visibility of coherent qubit oscillations. This approach amplifies the coherent oscillation magnitude but has no effect on the detector noise resulting in an increase in the signal to noise ratio. In this letter, we apply this scheme to demonstrate a significant enhancement of the fringe contrast of coherent Landau-Zener-Stuckelberg oscillations between singlet S and triplet T+ two-spin states. [http://dx.doi.org/10.1063/1.4749281]

引用

页数：3

共 9 条

[1] Rapid Single-Shot Measurement of a Singlet-Triplet Qubit
Barthel, C.
Reilly, D. J.
Marcus, C. M.
Hanson, M. P.
Gossard, A. C.
[J]. PHYSICAL REVIEW LETTERS, 2009, 103 (16)
[2] MEASUREMENTS OF COULOMB BLOCKADE WITH A NONINVASIVE VOLTAGE PROBE
FIELD, M
SMITH, CG
PEPPER, M
RITCHIE, DA
FROST, JEF
JONES, GAC
HASKO, DG
[J]. PHYSICAL REVIEW LETTERS, 1993, 70 (09) : 1311 - 1314
[3] Coherent control of three-spin states in a triple quantum dot
Gaudreau, L.
Granger, G.
Kam, A.
Aers, G. C.
Studenikin, S. A.
Zawadzki, P.
Pioro-Ladriere, M.
Wasilewski, Z. R.
Sachrajda, A. S.
[J]. NATURE PHYSICS, 2012, 8 (01) : 54 - 58
[4] A tunable few electron triple quantum dot
Gaudreau, L.
Kam, A.
Granger, G.
Studenikin, S. A.
Zawadzki, P.
Sachrajda, A. S.
[J]. APPLIED PHYSICS LETTERS, 2009, 95 (19)
[5] Three-dimensional transport diagram of a triple quantum dot
Granger, G.
Gaudreau, L.
Kam, A.
Pioro-Ladriere, M.
Studenikin, S. A.
Wasilewski, Z. R.
Zawadzki, P.
Sachrajda, A. S.
[J]. PHYSICAL REVIEW B, 2010, 82 (07):
[6] Triplet-singlet spin relaxation via nuclei in a double quantum dot
Johnson, AC
Petta, JR
Taylor, JM
Yacoby, A
Lukin, MD
Marcus, CM
Hanson, MP
Gossard, AC
[J]. NATURE, 2005, 435 (7044) : 925 - 928
[7] A Coherent Beam Splitter for Electronic Spin States
Petta, J. R.
Lu, H.
Gossard, A. C.
[J]. SCIENCE, 2010, 327 (5966) : 669 - 672
[8] Coherent manipulation of coupled electron spins in semiconductor quantum dots
Petta, JR
Johnson, AC
Taylor, JM
Laird, EA
Yacoby, A
Lukin, MD
Marcus, CM
Hanson, MP
Gossard, AC
[J]. SCIENCE, 2005, 309 (5744) : 2180 - 2184
[9] Quantum Interference between Three Two-Spin States in a Double Quantum Dot
Studenikin, S. A.
Aers, G. C.
Granger, G.
Gaudreau, L.
Kam, A.
Zawadzki, P.
Wasilewski, Z. R.
Sachrajda, A. S.
[J]. PHYSICAL REVIEW LETTERS, 2012, 108 (22)

← 1 →