We propose a scheme for using an unmodulated and unmeasured spin chain as a channel
for short distance quantum communications. The state to be transmitted is placed on one …

The substitution of one metal ion in a Cr-based molecular ring with dominant
antiferromagnetic couplings allows the engineering of its level structure and ground-state …

Transfer of data in linear quantum registers can be significantly simplified with
preengineered but not dynamically controlled interqubit couplings. We show how to …

The transfer of data is a fundamental task in information systems. Microprocessors contain
dedicated data buses that transmit bits across different locations and implement …

We have realized controllable coupling between two three-junction flux qubits by inserting
an additional coupler loop between them, containing three Josephson junctions. Two of …

Many promising schemes for quantum computing (QC) involve switching “on” and “off” a
physical coupling between qubits. This may prove extremely difficult to achieve …

We investigate analytically a star network of spins, in which all spins interact exclusively and
continuously with a central spin through Heisenberg XX couplings of equal strength. We find …

We propose and investigate a novel method for the controlled coupling of two Josephson
charge qubits by means of a variable electrostatic transformer. The value of the coupling …

We propose an approach to coherently transfer populations between selected quantum
states in one-and two-qubit systems by using controllable Stark-chirped rapid adiabatic …

It is sketched how a monostable rf-or dc-SQUID can mediate an inductive coupling between
two adjacent flux qubits. The non-trivial dependence of the SQUID's susceptibility on …