Viewpoints

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.

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 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.

Putting a New Spin on Heat Flow

Putting a New Spin on Heat Flow

July 7, 2014

Joseph P. Heremans and Stephen R. Boona

Researchers demonstrate, for the first time, the spin Peltier effect, in which a spin current in a metal causes heat flow in an adjoining magnet.

Synopses

Measuring Millikelvin Temperatures with Quantum Dots

Measuring Millikelvin Temperatures with Quantum Dots

August 1, 2014

Researchers have shown that millikelvin temperatures can be reliably measured using the ground-state optical properties of quantum dots.

Synopsis on Florian Haupt, Atac Imamoglu, and Martin Kroner Phys. Rev. Applied 2, 024001 (2014)
F. Seilmeier et al.
Phys. Rev. Applied 2, 024002 (2014)

Aspirin’s Quantum of Solace

Aspirin’s Quantum of Solace

July 30, 2014

A quantum calculation that includes many-body interactions shows why one form of aspirin is more stable than a structurally similar form.

Turbulent Times

Turbulent Times

July 29, 2014

By tracking the movement of tracer particles in a turbulent flow, researchers can connect the irreversibility of turbulence with microscopic fluid properties.

Direct Test of Cosmic Acceleration

Direct Test of Cosmic Acceleration

July 24, 2014

Future radio surveys of intergalactic hydrogen clouds could offer the first direct measurement of the Universe’s acceleration.

Focus

Nuclear Monitoring with Antineutrinos

Nuclear Monitoring with Antineutrinos

July 25, 2014

A system to monitor a nuclear reactor for possible diversion of weapons material would use an antineutrino detector parked close to the facility.

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.

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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