Annia Abtout Giulia Zheng Tutor : Anton Potocnik · TELEPORTATION 1.12.2014 1 - L.Steffen and al.,...
23
| | Annia Abtout Giulia Zheng Tutor : Anton Potocnik 1.12.2014 1
Transcript of Annia Abtout Giulia Zheng Tutor : Anton Potocnik · TELEPORTATION 1.12.2014 1 - L.Steffen and al.,...
| |
Annia Abtout Giulia Zheng Tutor : Anton Potocnik
1.12.2014 1
| | 1.12.2014 2
INDEX
• TELEPORTATION : Concept • TELEPORTATION : Implementation • TELEPORTATION : Fidelity
| | 1.12.2014 3
CONCEPT
| |
TELEPORTATION
1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ;
4
Def : «In a quantum mechanical context, teleportation describes the process of transferring an unknown quantum state between two parties at two different physical locations without transferring the physical carrier of information itself »1
Change picture: Select picture – right click – change picture
THOUGHT EXPERIMENT
Alice Bob
Quantum process
Classical information
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ;
6
ALGORITHM
1
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information".
7
CALCULATIONS BEHIND THE ALGORITHM
Q1
Q2 & Q3
1
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information".
8
CALCULATIONS BEHIND THE ALGORITHM
Q1
Q2 & Q3
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information".
9
CALCULATIONS BEHIND THE ALGORITHM
Q1
Q2 & Q3
CNOT + H
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information".
10
CALCULATIONS BEHIND THE ALGORITHM
Q1
Q2 & Q3
CNOT + H
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information".
11
CALCULATIONS BEHIND THE ALGORITHM2
Q1
Q2 & Q3
CNOT + H
| | 1.12.2014 12
IMPLEMENTATION
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422
13
IMPLEMENTATION 1
Change picture: Select picture – right click – change picture
IMPLEMENTATION 1
Chip design
Change picture: Select picture – right click – change picture
IMPLEMENTATION
Chip design
| | 1.12.2014
1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422
16
POST SELECTION • Method that implies a great amount of measurements
and the selection of a sample according on the outcome
• Readout obtained with Josephson a m p l i f i e r i n a phase-sensit ive mode :
1
Change picture: Select picture – right click – change picture
DETERMINISTIC MEASUREMENT
• The four randomly distributed Bell states are measured in a deterministic way using a high fidelity dispersive single shot qubit readout
• R e a d o u t s obtained with a J o s e p h s o n p a r a m e t r i c amplifier operated i n t h e p h a s e preserving mode:
| | 1.12.2014 1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information". 18
FIDELITY
Change picture: Select picture – right click – change picture
FIDELITY State-transfer process matrix for quantum teleportation with post selection
State-transfer process matrix for quantum teleportation with simultaneous deterministic measurement of all four outcomes
Change picture: Select picture – right click – change picture
FIDELITY
Characterization of the output state Q3
State-transfer process matrix for quantum teleportation with feed forward
Characterization of feed forward with a process fidelity of 72,4%
| | 1.12.2014 1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information". 21
CONCLUSION
Creation of an entangled pair between the
sender and the receiver
A two-qubit measurement of
all four Bell states at the sender
Feed-forward of the classical
information High fidelity
Space-like separation
between the sender and the
receiver
| | 1.12.2014 1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information". 22
Thank you for your attention !
| |
ETH Zurich Organisational unit Street address Postcode City www.ethz.ch/en.html Publisher: Organisational unit of ETH Zurich Design: Designer Name Images: Credit (slide xx), Credit (slide xx) © ETH Zurich, December 2013
1.12.2014 1 - L.Steffen and al., "Deterministic quantum teloportation with feed-forward in a solid state system", Nature 12422 ; 2- Nielsen and Chuang, "Quantum computation and Quantum information". 23
Contact information and credits
