Quantum Information with Solid-State Devices VO 141.A55 SS2016 - - PowerPoint PPT Presentation

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Quantum Information with Solid-State Devices VO 141.A55 SS2016 - - PowerPoint PPT Presentation

Oct 17, 2023 173 likes •329 views

Quantum Information with Solid-State Devices VO 141.A55 SS2016 Dr. Johannes Majer Lecture 7 Next Lecture May 23rd @ Resselpark W IENER P HYSIKALISCHES K OLLOQUIUM TU-W IEN - U NIVERSITT W IEN SS 2016 Einladung zum Vortrag von Ignacio

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Quantum Information with Solid-State Devices

VO 141.A55 SS2016

  • Dr. Johannes Majer

Lecture 7

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Next Lecture

May 23rd @ Resselpark

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WIENER PHYSIKALISCHES KOLLOQUIUM

TU-WIEN - UNIVERSITÄT WIEN SS 2016 Einladung zum Vortrag von

Ignacio Cirac

Max-Planck-Institut für Quantenoptik München

Quantum optics with emitters in waveguides

Recent progress in nano-fabrication and atomic physics has allowed to couple atoms (or

  • ther emitters) to structured waveguides. In this talk I will report on:(i) a theoretical

framework to describe some of those experiments using both a master equation and a path integral approach; (ii) the existence of many-photon bound states in the presence

  • f one emitter; (iii) some techniques to prepare multi-photon states in the waveguide

using strong coupling and collective effects.

  • 9. Mai 2016, 17:30 hrs

(ab 17 Uhr Kaffee)

TU Wien-Freihaus, Wiedner Hauptstrasse 8 – 10 1040 Wien Hörsaal 5,

  • 2. Stock, grüner Bereich

http://wpk.univie.ac.at

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SLIDE 7

tunnel junction

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SLIDE 8
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SLIDE 9

Shadow Evaporation

  • 1. elec t ron beam w rit ing
  • 2. developm ent
  • 3. first alum inum evaporat ion

e - e - e - e - e - e - PMMA/MAA Subst rat e Al Al O2 O2

  • 4. ox idat ion

Al Al

  • 5. sec ond alum inum evaporat ion
  • 6. lift -off

PMMA PMMA PMMA

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SLIDE 10

RF SET

LC tank circuit, impedance transformer

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!1 !0.5 0.5 1 1.5 2 !1 !0.8 !0.6 !0.4 !0.2 0.2 0.4 0.6 0.8 1 x 10

!3

[1/2 | 0] [(!2!!1)/2 | 2Ec/e] [(!1!!2)/2 | !2Ec/e] Gate Charge ng=(Vg Cg)/e Source Drain Voltage (V)

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!1 !0.5 0.5 1 1.5 2 !2 !1.5 !1 !0.5 0.5 1 1.5 2 x 10

!3

[!/Ec("2!"1)+1/2 | 4!/e] [(!/Ec+1/2)("2!"1) | 4!/e+2Ec/e] [!/Ec("1!"2)+1/2 | !4!/e] [(!/Ec+1/2)("1!"2) | !4!/e!2Ec/e] Gate Charge ng=(Vg Cg)/e Source Drain Voltage (V)

C2 C1 C2 C1

1 1 e e

Superconducting SET

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Josephson quasi particle cycle

−1 −0.5 0.5 1 1.5 2 −2 −1.5 −1 −0.5 0.5 1 1.5 2 x 10

−3

[κ2(1/2+∆/Ec)−1| 2∆/e + Ec/e] [κ2(3/2+∆/Ec)−1 | 2∆/e + 3Ec/e] [−κ1(1/2+∆/Ec)+1 | 2∆/e + Ec/e] [−κ1(3/2+∆/Ec)+1 | 2∆/e + 3Ec/e] [κ2(1/2+∆/Ec)−1 | −2∆/e − Ec/e] [κ2(3/2+∆/Ec)−1 | −2∆/e − 3Ec/e] [−κ1(1/2+∆/Ec)+1 | −2∆/e − Ec/e] [−κ1(3/2+∆/Ec)+1 | −2∆/e − 3Ec/e] Gate Charge ng=(Vg Cg)/e

C2 C1 C2 C1

2 2 1 2e e

C2 C1

1 e

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Superconducting RF-SET

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