Events
Séminaire de l'IQ - Wasi Uddin
Date : 20 January 2021 8:30
Type : Institut Quantique
Location :
Rejoindre la réunion Microsoft Teams / Join the Microsoft Teams meeting
Wasi Uddin
IIT Delhi
Invité de : Eva Dupont-Ferrier
Titre/Title
From Bits to Qubits Using Solid State Devices
Résumé/Abstract
The Solid State Devices used in today’s computers are governed by the classical laws of physics, where the high resistive state (“ZERO”) and a low resistive state (“ONE”) are the only states available to perform logic operations base on the Boolean algebra. Contrarily, quantum mechanics lets a different way of performing a logic operation, which was not possible with classical logic. In this seminar, I will talk about a brief evolution of computing elements. Then I will lead towards the various approaches to perform quantum mechanical logic operations, such as (1) spin orientation of single electrons or nuclei (spin qubit), (2) the location of a single electron charge (charge qubit), (3) quasiparticle and (4) Cooper pair (superconducting qubit). These are some essential building-blocks for quantum computing using solid-state devices. Further, I will discuss my research on dopant induced quantum effects in fully CMOS compatible silicon-based devices. Dopant transistors follow quantum mechanics laws enabling the coulomb effect to allow single- electron tunneling from source to drain lead. Single-electron tunneling can also be mediated by multiple dopants in the channel region, facilitating observation of dopant-dopant interactions. This interaction is a prerequisite for the charge-based quantum computing and single-electron turnstile. Thus, a comprehensive understanding of dopant-dopant interaction and single-electron tunneling is desired.
Wasi Uddin
IIT Delhi
Invité de : Eva Dupont-Ferrier
Titre/Title
From Bits to Qubits Using Solid State Devices
Résumé/Abstract
The Solid State Devices used in today’s computers are governed by the classical laws of physics, where the high resistive state (“ZERO”) and a low resistive state (“ONE”) are the only states available to perform logic operations base on the Boolean algebra. Contrarily, quantum mechanics lets a different way of performing a logic operation, which was not possible with classical logic. In this seminar, I will talk about a brief evolution of computing elements. Then I will lead towards the various approaches to perform quantum mechanical logic operations, such as (1) spin orientation of single electrons or nuclei (spin qubit), (2) the location of a single electron charge (charge qubit), (3) quasiparticle and (4) Cooper pair (superconducting qubit). These are some essential building-blocks for quantum computing using solid-state devices. Further, I will discuss my research on dopant induced quantum effects in fully CMOS compatible silicon-based devices. Dopant transistors follow quantum mechanics laws enabling the coulomb effect to allow single- electron tunneling from source to drain lead. Single-electron tunneling can also be mediated by multiple dopants in the channel region, facilitating observation of dopant-dopant interactions. This interaction is a prerequisite for the charge-based quantum computing and single-electron turnstile. Thus, a comprehensive understanding of dopant-dopant interaction and single-electron tunneling is desired.