Quantum communication through spin chain dynamics: an introductory overview

By Sougato Bose. 2007

431 citations recorded by the source corpus.

We present an introductory overview of the use of spin chains as quantum wires, which has recently developed into a topic of lively interest. The principal motivation is in connecting quantum registers without resorting to optics. A spin chain is a permanently coupled 1D system of spins. When one places a quantum state on one end of it, the state will be dynamically transmitted to the other end with some efficiency if the spins are coupled by an exchange interaction. No external modulations or measurements on the body of the chain, except perhaps at the very ends, is required for this purpose. For the simplest (uniformly coupled) chain and the simplest encoding (single qubit encoding), however, dispersion reduces the quality of transfer. We present a variety of alternatives proposed by various groups to achieve perfect quantum state transfer through spin chains. We conclude with a brief discussion of the various directions in which the topic is developing.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/e9c73df3ef0b478e39c5d78c6e06ed5ee6fe080a

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Light-cone-like spreading of correlations in a quantum many-body system (2011, background): “, and for engineering the efficient quantum channels necessary for fast quantum computation”
Quasiparticle engineering and entanglement propagation in a quantum many-body system (2014, background): “This immediately opens many new paths for experimental investigations, the subjects of which can be broadly split into the following: (1) Quantum transport phenomena, concerning how quantum states and entanglement [11], or excitations [12, 28], propagate across quantum many-body systems.”