Quantum computers have the potential to outperform their classical counterparts in a
qualitative manner, as demonstrated by algorithms which exploit the parallelism inherent in …

Quantum computers, if available, could perform certain tasks much more efficiently than
classical computers by exploiting different physical principles,,. A quantum computer would …

As with classical information processing, a quantum information processor requires bits
(qubits) that can be independently addressed and read out, long-term memory elements to …

Based on a quantum analysis of two capacitively coupled current-biased Josephson
junctions, we propose two fundamental two-qubit quantum logic gates. Each of these gates …

We discuss the prospects and challenges for implementing a quantum computer using
superconducting electronics. It appears that Josephson junction devices operating at milli …

Superconducting circuits are macroscopic in size but have generic quantum properties such
as quantized energy levels, superposition of states, and entanglement, all of which are more …

The two-level systems (TLSs) naturally occurring in Josephson junctions constitute a major
obstacle for the operation of superconducting phase qubits. Since these TLSs can possess …

A practical quantum computer, if built, would consist of a set of coupled two-level quantum
systems (qubits). Among the variety of qubits implemented, solid-state qubits are of …

Following the demonstration of coherent control of the quantum state of a superconducting
charge qubit, a variety of qubits based on Josephson junctions have been implemented …

Josephson junctions are good candidates for the construction of quantum bits (qubits) for a
quantum computer [l]. This system is attractive because the low dissipation inherent to …