Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

Transistors have continuously reduced in size and increased in switching speed since their
invention in 1947. The exponential pace of transistor evolution has led to a revolution in …

Over the course of the past decade, decoherence has become a ubiquitous scienti? c term
popular in all kinds of research, from fundamental theories of quantum physics to …

Methods for, and limitations to, the generation of entangled states of trapped atomic ions are
examined. As much as possible, state manipulations are described in terms of quantum …

A qubit was designed that can be fabricated with conventional electron beam lithography
and is suited for integration into a large quantum computer. The qubit consists of a …

We present the design of a superconducting qubit that has circulating currents of opposite
sign as its two states. The circuit consists of three nanoscale aluminum Josephson junctions …

Microwave spectroscopy experiments have been performed on two quantum levels of a
macroscopic superconducting loop with three Josephson junctions. Level repulsion of the …

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

We report the generation and observation of coherent temporal oscillations between the
macroscopic quantum states of a Josephson tunnel junction by applying microwaves with …

(57) ABSTRACT A method for computing using a quantum system compris ing a plurality of
Superconducting qubits is provided. Quan tum system can be in any one of at least two …