Viewpoints

Sending Messages with a Quantum Seal

Sending Messages with a Quantum Seal

July 21, 2014

Hermann Kampermann

With a simple optical experiment, researchers have demonstrated a quantum digital signature scheme for identifying the sender of an electronic message without requiring the use of quantum memories.

A New Approach to the Matching Problem

A New Approach to the Matching Problem

July 21, 2014

Stephan Mertens

Mathematical tools from physics are enabling new ways to study a classic optimization problem.

A Critical Test of Quantum Criticality

A Critical Test of Quantum Criticality

July 14, 2014

Martin Klanjšek

Theoretically predicted quantum critical behavior in a model magnetic material has been experimentally confirmed at a quantitative level.

Diagnosing Leukemia Through Entropy

Diagnosing Leukemia Through Entropy

May 28, 2014

Robert Vogel, Carly G. K. Ziegler, and Grégoire Altan-Bonnet

Measurements of the entropy of immune cell distributions can provide a reliable tool for the diagnosis of acute myeloid leukemia.

Synopses

Dense Suspensions Spread Best

Dense Suspensions Spread Best

July 23, 2014

High-speed droplets containing a dense suspension of particles could be used to make universal coatings that spread on many types of surfaces.

A Cooper-Pair Laser

A Cooper-Pair Laser

July 22, 2014

A superconducting transistor embedded in a microcavity acts like a single-emitter laser that could be used to generate nonclassical light.

Top Quark Mass Gets an Update

Top Quark Mass Gets an Update

July 17, 2014

A new analysis of data from the Tevatron delivers the most precise value of the top quark mass based on a single measurement.

Spooky Bidding

Spooky Bidding

June 12, 2014

Quantum information could let bridge players improve their bids.

Focus

New Medical Scan Requires Less Touching

New Medical Scan Requires Less Touching

July 18, 2014

A medical imaging technique uses electric and magnetic fields to generate vibrations in tissues and measure their mechanical stiffness in a new way.

Thin-film Peeling is Not Always Smooth

Thin-film Peeling is Not Always Smooth

June 6, 2014

The attractive force that allows geckos to walk on the ceiling fluctuates in time at the nanoscale, potentially causing a gecko’s feet to detach from a surface more easily than previous theories suggested.

Notes from the Editors

<title>Bargaining for a Better Helium Deal</title>

Bargaining for a Better Helium Deal

July 17, 2014

A pilot program jointly run by the APS hopes to use the collective bargaining power of many researchers to negotiate a better price for liquid helium.


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