Dynamics of Classical and Quantum Information on Spin-chains with Multiple Interactions

2018 ◽  
Vol 7 (2) ◽  
pp. 29-33 ◽  
Keyword(s):  
Quantum Information ◽  
Spin Chains ◽  
Multiple Interactions

scholarly journals Protecting quantum information in quantum dot spin chains by driving exchange interactions periodically

2021 ◽  
Vol 103 (24) ◽  
Author(s):  
John S. Van Dyke ◽  
Yadav P. Kandel ◽  
Haifeng Qiao ◽  
John M. Nichol ◽  
Sophia E. Economou ◽  
...  
Keyword(s):  
Quantum Information ◽  
Quantum Dot ◽  
Exchange Interactions ◽  
Spin Chains

scholarly journals Routing quantum information in spin chains

2013 ◽  
Vol 87 (6) ◽  
Author(s):  
Simone Paganelli ◽  
Salvatore Lorenzo ◽  
Tony J. G. Apollaro ◽  
Francesco Plastina ◽  
Gian Luca Giorgi
Keyword(s):  
Quantum Information ◽  
Spin Chains

scholarly journals INFORMATION TRANSFER RATES IN SPIN QUANTUM CHANNELS

2007 ◽  
Vol 05 (04) ◽  
pp. 439-455 ◽  
Author(s):  
DAVIDE ROSSINI ◽  
VITTORIO GIOVANNETTI ◽  
ROSARIO FAZIO
Keyword(s):  
Quantum Information ◽  
Information Transfer ◽  
Transmission Efficiency ◽  
Spin Chains ◽  
Quantum Channels ◽  
Transfer Rates ◽  
Temporal Correlations ◽  
Spin Quantum ◽  
Communication Efficiency

We analyze the communication efficiency of quantum information transfer along unmodulated spin chains by computing the communication rates of various protocols. The effects of temporal correlations are discussed, showing that they can be exploited to boost the transmission efficiency.

Quantum state transfer in disordered spin chains: How much engineering is reasonable?

2015 ◽  
Vol 15 (7&8) ◽  
pp. 582-600
Author(s):  
Analia Zwick ◽  
Gonzalo A. Alvarez ◽  
Joachim Stolze ◽  
Omar Osenda
Keyword(s):  
Quantum Information ◽  
Information Transfer ◽  
Information Technologies ◽  
Scaling Laws ◽  
Transfer Task ◽  
Spin Chains ◽  
Fine Tuning ◽  
Quantum State Transfer ◽  
State Transfer ◽  
Engineering Effort

The transmission of quantum states through spin chains is an important element in the implementation of quantum information technologies. Speed and fidelity of transfer are the main objectives which have to be achieved by the devices even in the presence of imperfections which are unavoidable in any manufacturing process. To reach these goals, several kinds of spin chains have been suggested, which differ in the degree of fine-tuning, or engineering, of the system parameters. In this work we present a systematic study of two important classes of such chains. In one class only the spin couplings at the ends of the chain have to be adjusted to a value different from the bulk coupling constant, while in the other class every coupling has to have a specific value. We demonstrate that configurations from the two different classes may perform similarly when subjected to the same kind of disorder in spite of the large difference in the engineering effort necessary to prepare the system. We identify the system features responsible for these similarities and we perform a detailed study of the transfer fidelity as a function of chain length and disorder strength, yielding empirical scaling laws for the fidelity which are similar for all kinds of chain and all disorder models. These results are helpful in identifying the optimal spin chain for a given quantum information transfer task. In particular, they help in judging whether it is worthwhile to engineer all couplings in the chain as compared to adjusting only the boundary couplings.

Simple quantum information algorithms in cavity QED

2003 ◽  
Vol 50 (6-7) ◽  
pp. 901-913 ◽  
Author(s):  
H. Ollivier ◽  
F. Yamaguchi ◽  
M. Brune ◽  
J. M. Raimond ◽  
S. Haroche ◽  
...  
Keyword(s):  
Quantum Information ◽  
Cavity Qed ◽  
Simple Quantum

Solvable nineteen-vertex models and quantum spin chains of spin one

1994 ◽  
Vol 4 (8) ◽  
pp. 1151-1159 ◽  
Author(s):  
Makoto Idzumi ◽  
Tetsuji Tokihiro ◽  
Masao Arai
Keyword(s):  
Quantum Spin ◽  
Spin Chains ◽  
Quantum Spin Chains ◽  
Vertex Models
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