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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. |
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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. |
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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. |
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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. |
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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. |
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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. |
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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. |
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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. |
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