TITLE:
Quantum Information Processing Using the Exchange Interaction
AUTHORS:
M. Guha Majumdar
KEYWORDS:
Entanglement, Quantum Computation, Quantum Communication
JOURNAL NAME:
Journal of Quantum Information Science,
Vol.8 No.4,
November
22,
2018
ABSTRACT: In this paper, I propose new models
of quantum information processing using the exchange interaction in physical
systems. The partial SWAP operator that can be realized using the exchange
interaction is used as the underlying resource for defining models of quantum
computation, quantum communication, quantum memory and decoherence-free
subspaces. Given the non-commutativity of these operators (for adjacent operators operating on a
common qubit), a number of quantum states and entanglement patters can be
obtained. This zoo of states can be classified, due to the parity constraints
and permutation symmetry of the states, into invariant subspaces that are used
for the definition of some of the applications in this paper.