scholarly journals State transfer in an inhomogeneous spin chain

2020 ◽  
Vol 53 (15) ◽  
pp. 155301
Author(s):  
M Iversen ◽  
R E Barfknecht ◽  
A Foerster ◽  
N T Zinner
Keyword(s):  
Spin Chain ◽  
State Transfer ◽  
Inhomogeneous Spin

scholarly journals Almost exact state transfer in a spin chain via pulse control

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
Zhao-Ming Wang ◽  
Marcelo S. Sarandy ◽  
Lian-Ao Wu
Keyword(s):  
Spin Chain ◽  
Pulse Control ◽  
State Transfer

2-qubit quantum state transfer in spin chains and cold atoms with weak links

2017 ◽  
Vol 15 (05) ◽  
pp. 1750037 ◽  
Author(s):  
Salvatore Lorenzo ◽  
Tony J. G. Apollaro ◽  
Andrea Trombettoni ◽  
Simone Paganelli
Keyword(s):  
Quantum State ◽  
Optical Lattices ◽  
Cold Atoms ◽  
Condensed Matter ◽  
Spin Systems ◽  
Spin Chains ◽  
Weak Links ◽  
Quantum State Transfer ◽  
State Transfer ◽  
Inhomogeneous Spin

In this paper we discuss the implementation of 2-qubit quantum state transfer (QST) in inhomogeneous spin chains where the sender and the receiver blocks are coupled through the bulk channel via weak links. The fidelity and the typical timescale of the QST are discussed as a function of the parameters of the weak links. Given the possibility of implementing with cold atoms in optical lattices a variety of condensed matter systems, including spin systems, we also discuss the possible implementation of the discussed 2-qubit QST with cold gases with weak links, together with a discussion of the applications and limitations of the presented results.

scholarly journals How to counteract systematic errors in quantum state transfer

2012 ◽  
Vol 12 (7&8) ◽  
pp. 648-660
Author(s):  
Chiara Marletto ◽  
Alastair Kay ◽  
Artur Ekert
Keyword(s):  
Quantum State ◽  
Spin Chain ◽  
Systematic Errors ◽  
Quantum State Transfer ◽  
State Transfer

In the absence of errors, the dynamics of a spin chain, with a suitably engineered local Hamiltonian, allow the perfect, coherent transfer of a quantum state over large distances. Here, we propose encoding and decoding procedures to recover perfectly from low rates of systematic errors. The encoding and decoding regions, located at opposite ends of the chain, are small compared to the length of the chain, growing linearly with the size of the error. We also describe how these errors can be identified, again by only acting on the encoding and decoding regions.

scholarly journals Controlled state transfer in a Heisenberg spin chain by periodic drives

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
H. J. Shan ◽  
C. M. Dai ◽  
H. Z. Shen ◽  
X. X. Yi
Keyword(s):  
Spin Chain ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
State Transfer
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