Sort by: Per Page:
1.
Synopsis
|
Published June 15, 2009 Magnetism Quantum Mechanics Strongly Correlated Materials The finding of a new duality theory could contribute to solving problems in quantum magnetism. |
2.
Trends
|
Physics 2, 40 (2009) – Published May 18, 2009 Quantum Information Optics Quantum Mechanics Coherent optical systems combined with micromechanical devices may enable development of ultrasensitive force sensors and quantum information processing technology, as well as permit observation of quantum behavior in large-scale structures. |
3.
Viewpoint
|
Physics 2, 39 (2009) – Published May 11, 2009 Quantum Information Quantum Mechanics A new algorithm allows for the extremely efficient calculation of thermally averaged quantities in one dimension, in conjunction with the density matrix renormalization group method. The key is the judicious selection of a few representative states. |
4.
Synopsis
|
Published May 4, 2009 How screening affects the Coulomb interaction has long been considered a solved problem, but an analysis indicates there is an error in the widely used analytical approach. |
5.
Synopsis
|
Published May 4, 2009 Materials Science Nonlinear Dynamics Quantum Mechanics Neutron scattering measurements indicate that intrinsic localized modes are found in thermal equilibrium in NaI, a simple ionic crystal. |
6.
Viewpoint
|
Physics 2, 32 (2009) – Published April 27, 2009 In the weird world of quantum mechanics, looking at time flowing backwards allows us to look forward to precision measurements. |
7.
Synopsis
|
Published April 20, 2009 Finding a quantum theory of gravity remains one of the great unsolved problems in modern physics. Two papers present a quantum gravity theory that, while making different assumptions than general relativity, still reproduces Einstein’s theory in certain limits. |
8.
Synopsis
|
Published January 12, 2009 Quantum graphs are convenient mathematical tools for describing complex molecules and networks of quantum wires. Scientists are addressing the question: When and how fast can a wave function spread out over the entire graph? |
9.
Viewpoint
|
Physics 2, 1 (2009) – Published January 5, 2009 The presence of disorder in a quantum many-body system may appear to make an already difficult problem nearly impossible to solve. However, scientists show that the details of the disorder often do not matter, allowing them to describe realistic systems from magnets to superconductors. |
10.
Viewpoint
|
Physics 1, 40 (2008) – Published December 8, 2008 Superfluidity Quantum Mechanics A new phase of matter called a superglass may be possible, as shown by an investigation of the quantum mechanical analog of a classical hard sphere glass. |
11.
Synopsis
|
Published November 6, 2008 The optical equivalent of electron oscillations in periodic lattices has now been described by a fully quantum mechanical theory. |
12.
Synopsis
|
Published October 27, 2008 When two bulk objects are separated by a sufficiently small distance, quantum fluctuations in the electromagnetic field give rise to Casimir forces between them. Two papers explore how these forces are affected by the electrical properties of the materials. |
13.
Viewpoint
|
Physics 1, 26 (2008) – Published October 6, 2008 Superfluidity Quantum Mechanics Fluid Dynamics Images of vortex motion in superfluid helium reveal connections between quantum and classical turbulence and may lead to an understanding of complex flows in both superfluids and ordinary fluids. |
14.
Synopsis
|
Published August 5, 2008 Bell showed that quantum entanglement cannot be modeled with local hidden variables alone. Now, physicists argue that only models based exclusively on nonlocal hidden variables can reproduce all possible quantum correlations. |
15.
Viewpoint
|
Physics 1, 6 (2008) – Published July 23, 2008 Quantum Mechanics Semiconductor Physics Electrons in graphene can be described by the relativistic Dirac equation for massless fermions and exhibit a host of unusual properties. The surfaces of certain band insulators—called topological insulators—can be described in a similar way, leading to an exotic metallic surface on an otherwise “ordinary” insulator. |
16.
Synopsis
|
Published July 21, 2008 Quantum Mechanics Statistical Mechanics Theorists show that the quantum critical states of fermions may have fractal character and predict signatures of this result in liquid 3He, a fermionic fluid. |
17.
Viewpoint
|
Physics 1, 3 (2008) – Published July 14, 2008 The longitudinal ringing mode of a metal bar resonator weighing approximately one metric ton has been cooled to submillikelvin temperatures with the use of active amplifier feedback. Further improvements may allow researchers to approach the quantum limit for cooling macroscopic objects. |
18.
Viewpoint
|
Physics 1, 4 (2008) – Published July 14, 2008 Modification of electromagnetic zero-point fluctuations by closely spaced conductors causes an interaction between them called the Casimir force. New experiments with nanostructured silicon substrates show that the geometry of the conducting surfaces has a large effect on this force. |
19.
Synopsis
|
Published July 14, 2008 The Dirac and Klein-Gordon equations provide a full relativistic description for particles with spin ½ and 0, respectively. A calculation now shows how to extend this description to particles, such as nuclei, with spin greater than ½. |
RSS Feed