Archive for September 2nd, 2011

September 2, 2011

UCSB physicists demonstrate the quantum von Neumann architecture

New approaches to quantum computing are announced almost every day. However, almost all of them seem to be at the level of laboratory experiments.

UCSB physicists demonstrate the quantum von Neumann architecture

UCSB physicists have demonstrated a quantum integrated circuit that implements the quantum von Neumann architecture. In this architecture, a long-lived quantum random access memory can be programmed using a quantum central processing unit, all constructed on a single chip, providing the key components for a quantum version of a classical computer.

The UCSB hardware is based on superconducting quantum circuits, and must be cooled to very low temperatures to display quantum behavior. The architecture represents a new paradigm in quantum information processing, and shows that quantum large-scale-integration is within reach.

Further reading:

Computer architecture recreated on quantum device

Could this quantum computer be the real deal?

Implementing the Quantum von Neumann Architecture with Superconducting Circuits

September 2, 2011

Study linking gut microbe type with diet has implications for fighting GI disorders

Our usual diet has a significant effect on the types of bacteria in our intestines – but very little is known about what effect this has on overall health. So we still have a lot to learn about how diet affects health, both directly and indirectly.

Study linking gut microbe type with diet has implications for fighting GI disorders

“You are what you eat” is familiar enough, but how deep do the implications go? An interdisciplinary group of investigators from the Perelman School of Medicine at the University of Pennsylvania have found an association between long-term dietary patterns and the bacteria of the human gut. In a study of 98 healthy volunteers, the gut bacteria separated into two distinct groups, called enterotypes, that were associated with long-term consumption of either a typical Western diet rich in meat and fat versus a more agrarian diet rich in plant material.

September 2, 2011

Obesity Can Turn Body Fat Toxic

A new study indicates that all types of body fat can be risky. In some people, perhaps about 30%, obesity does not seem to have serious effects on health. But in others it apparently stimulates immune system activity that leads to insulin resistance, hypertension, and low levels of “good” cholesterol.

Obesity Can Turn Body Fat Toxic – Science News

Obesity can trigger inflammation in the fat cells found just below the skin, creating an environment that has been linked with the development of both diabetes and heart disease, two new studies indicate.

The findings suggest that people need to worry about all types of body fat, not just the deeply embedded fat that earlier work had focused on. But the new work also hints that some face a higher risk than others.