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.

Quantum Jostling Proves Diverting for Electrons in a Metal

Quantum Jostling Proves Diverting for Electrons in a Metal

June 30, 2014

Rex Godby

A new model shows that quantum fluctuations make a significant contribution to a metal’s low-temperature resistance.

Synopses

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.

Electronic Tuning of Spin Waves

Electronic Tuning of Spin Waves

July 16, 2014

In a magnetic material with strong spin-orbit coupling, the phase of spin waves can be controlled with an electric field.

Competing for Advantage in a Phonon Laser

Competing for Advantage in a Phonon Laser

July 15, 2014

Mode competition—a well-known phenomenon in photon lasers—has now been studied and controlled in phonon lasers.

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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