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Author(s): Renyuan Liao, Yu Yi-Xiang, and Wu-Ming Liu
We investigate a two-component atomic Fermi gas with population imbalance in the presence of Rashba-type spin-orbit coupling (SOC). As a competition between SOC and population imbalance, the finite-temperature phase diagram reveals a large variety of new features, including the expanding of the supe...
[Phys. Rev. Lett. 108, 080406] Published Wed Feb 22, 2012
Author(s): Gerardo A. Paz-Silva, A. T. Rezakhani, Jason M. Dominy, and D. A. Lidar
It is well known that the quantum Zeno effect can protect specific quantum states from decoherence by using projective measurements. Here we combine the theory of weak measurements with stabilizer quantum error correction and detection codes. We derive rigorous performance bounds which demonstrate t...
[Phys. Rev. Lett. 108, 080501] Published Wed Feb 22, 2012
Author(s): C. J. Gommes, Y. Jiao, and S. Torquato
The degeneracy of two-phase disordered microstructures consistent with a specified correlation function is analyzed by mapping it to a ground-state degeneracy. We determine for the first time the associated density of states via a Monte Carlo algorithm. Our results are explained in terms of the roug...
[Phys. Rev. Lett. 108, 080601] Published Wed Feb 22, 2012
Author(s): A. W. Steiner and S. Gandolfi
Using a phenomenological form of the equation of state of neutron matter near the saturation density which has been previously demonstrated to be a good characterization of quantum Monte Carlo simulations, we show that currently available neutron star mass and radius measurements provide a significa...
[Phys. Rev. Lett. 108, 081102] Published Wed Feb 22, 2012
Author(s): Martin Bauer, Raoul Malm, and Matthias Neubert
A minimal solution to the flavor problem of warped extra-dimension models, i.e., the excessive mixed-chirality contribution to CP violation in K-K̅ mixing arising from Kaluza-Klein (KK) gluon exchange, is proposed. Extending the strong-interaction gauge group in the bulk by an additional SU(...
[Phys. Rev. Lett. 108, 081603] Published Wed Feb 22, 2012
Author(s): T. Aaltonen et al. (CDF Collaboration)
We have observed exclusive γγ production in proton-antiproton collisions at √s=1.96 TeV, using data from 1.11±0.07 fb-1 integrated luminosity taken by the Run II Collider Detector at Fermilab. We selected events with two electromagnetic showers, each with transverse energy ET>2.5 GeV and pseud...
[Phys. Rev. Lett. 108, 081801] Published Wed Feb 22, 2012
Author(s): Jia-Jun Wu, Xiao-Hai Liu, Qiang Zhao, and Bing-Song Zou
The BES-III Collaboration recently reported the observation of anomalously large isospin violations in J/ψ→γη(1405/1475)→γπ0f0(980)→γ+3π, where the f0(980) in the ππ invariant mass spectrum appears to be much narrower (∼10 MeV) than the peak width (∼50 MeV) measured in other processes. We show t...
[Phys. Rev. Lett. 108, 081803] Published Wed Feb 22, 2012
Author(s): Erhan Saglamyurek, Neil Sinclair, Jeongwan Jin, Joshua A. Slater, Daniel Oblak, Félix Bussières, Mathew George, Raimund Ricken, Wolfgang Sohler, and Wolfgang Tittel
We demonstrate the conditional detection of time-bin qubits after storage in and retrieval from a photon-echo–based waveguide quantum memory. Each qubit is encoded into one member of a photon pair produced via spontaneous parametric down-conversion, and the conditioning is achieved by the detection ...
[Phys. Rev. Lett. 108, 083602] Published Wed Feb 22, 2012
Author(s): Simon R. Huisman, Rajesh V. Nair, Alex Hartsuiker, Léon A. Woldering, Allard P. Mosk, and Willem L. Vos
We investigate the diffraction conditions and associated formation of stop gaps for waves in crystals with different Bravais lattices. We identify a prominent stop gap in high-symmetry directions that occurs at a frequency below the ubiquitous first-order Bragg condition. This sub-Bragg-diffraction ...
[Phys. Rev. Lett. 108, 083901] Published Wed Feb 22, 2012
Author(s): Lieven Verslegers, Zongfu Yu, Zhichao Ruan, Peter B. Catrysse, and Shanhui Fan
We observe from simulations that a doubly resonant structure can exhibit spectral behavior analogous to electromagnetically induced transparency, as well as superscattering, depending on the excitation. We develop a coupled-mode theory that explains this behavior in terms of the orthogonality of the...
[Phys. Rev. Lett. 108, 083902] Published Wed Feb 22, 2012
Author(s): L. Q. English, F. Palmero, P. Candiani, J. Cuevas, R. Carretero-González, P. G. Kevrekidis, and A. J. Sievers
We show experimentally and numerically that an intrinsic localized mode (ILM) can be stably produced (and experimentally observed) via subharmonic, spatially homogeneous driving in the context of a nonlinear electrical lattice. The precise nonlinear spatial response of the system has been seen to de...
[Phys. Rev. Lett. 108, 084101] Published Wed Feb 22, 2012
Author(s): A. J. Turner, G. Gogoberidze, and S. C. Chapman
Single point spacecraft observations of the turbulent solar wind flow exhibit a characteristic nonaxisymmetric anisotropy that depends sensitively on the perpendicular power spectral exponent. We use this nonaxisymmetric anisotropy as a function of wave vector direction to test models of MHD turbule...
[Phys. Rev. Lett. 108, 085001] Published Wed Feb 22, 2012
Author(s): P. M. Nilson, J. R. Davies, W. Theobald, P. A. Jaanimagi, C. Mileham, R. K. Jungquist, C. Stoeckl, I. A. Begishev, A. A. Solodov, J. F. Myatt, J. D. Zuegel, T. C. Sangster, R. Betti, and D. D. Meyerhofer
Time-resolved Kα spectroscopy has been used to infer the hot-electron equilibration dynamics in high-intensity laser interactions with picosecond pulses and thin-foil solid targets. The measured Kα-emission pulse width increases from ∼3 to 6 ps for laser intensities from ∼1018 to 1019 W/cm2. Collis...
[Phys. Rev. Lett. 108, 085002] Published Wed Feb 22, 2012
Author(s): Dominic C. Wadkin-Snaith and Dimitri M. Gangardt
We define and study holelike excitations (the Lieb II mode) in a weakly interacting Bose liquid subject to external confinement. These excitations are obtained by semiclassical quantization of gray solitons propagating on top of a Thomas-Fermi background. Radiation of phonons by an accelerated gray ...
[Phys. Rev. Lett. 108, 085301] Published Wed Feb 22, 2012
Author(s): D. Ma, A. D. Stoica, X.-L. Wang, Z. P. Lu, B. Clausen, and D. W. Brown
We show that a variety of bulk metallic glasses (BMGs) inherit their Young’s modulus and shear modulus from the solvent components. This is attributed to preferential straining of locally solvent-rich configurations among tightly bonded atomic clusters, which constitute the weakest link in an amorph...
[Phys. Rev. Lett. 108, 085501] Published Wed Feb 22, 2012
Author(s): Camille Aron, Gabriel Kotliar, and Cedric Weber
We study the steady-state dynamics of the Hubbard model driven out of equilibrium by a constant electric field and coupled to a dissipative heat bath. For a very strong field, we find a dimensional reduction: the system behaves as an equilibrium Hubbard model in lower dimensions. We derive steady-st...
[Phys. Rev. Lett. 108, 086401] Published Wed Feb 22, 2012
Author(s): Robert Peters, Norio Kawakami, and Thomas Pruschke
We propose the notion of a spin-selective Kondo insulator, which provides a fundamental mechanism to describe the ferromagnetic phase of the Kondo lattice model with antiferromagnetic coupling. This unveils a remarkable feature of the ferromagnetic metallic phase: the majority-spin conduction electr...
[Phys. Rev. Lett. 108, 086402] Published Wed Feb 22, 2012
Author(s): R. Arita, J. Kuneš, A. V. Kozhevnikov, A. G. Eguiluz, and M. Imada
Ab initio analyses of A2IrO4 (A=Sr,Ba) are presented. Effective Hubbard-type models for Ir 5d t2g manifolds downfolded from the global band structure are solved based on the dynamical mean-field theory. The results for A=Sr and Ba correctly reproduce paramagnetic metals undergoing continuous transit...
[Phys. Rev. Lett. 108, 086403] Published Wed Feb 22, 2012
Author(s): Chetan Dhital, Z. Yamani, Wei Tian, J. Zeretsky, A. S. Sefat, Ziqiang Wang, R. J. Birgeneau, and Stephen D. Wilson
We report neutron scattering experiments probing the influence of uniaxial strain on both the magnetic and structural order parameters in the parent iron pnictide compound, BaFe2As2. Our data show that modest strain fields along the in-plane orthorhombic b axis can affect significant changes in phas...
[Phys. Rev. Lett. 108, 087001] Published Wed Feb 22, 2012
Author(s): Marie-Bernadette Lepetit, Bernard Mercey, and Charles Simon
The control of matter properties (transport, magnetic, dielectric,…) using synthesis as thin films is strongly hindered by the lack of reliable theories, able to guide the design of new systems, through the understanding of the interface effects and of the way the substrate constraints are imposed o...
[Phys. Rev. Lett. 108, 087202] Published Wed Feb 22, 2012
Author(s): Ying-Shuang Fu, Qi-Kun Xue, and Roland Wiesendanger
We have performed spin-resolved measurements on a Kondo impurity in the presence of RKKY-type exchange coupling. By placing manganese phthalocyanine (MnPc) molecules on Fe-supported Pb islands, a Kondo system is devised which is exchange coupled to a magnetic substrate via conduction electrons in Pb...
[Phys. Rev. Lett. 108, 087203] Published Wed Feb 22, 2012
Author(s): Y. Yoshida, S. Schröder, P. Ferriani, D. Serrate, A. Kubetzka, K. von Bergmann, S. Heinze, and R. Wiesendanger
We report a transverse conical spin spiral as the magnetic ground state of a double-layer Mn on a W(110) surface. Using spin-polarized scanning tunneling microscopy, we find a long-range modulation along the [001] direction with a periodicity of 2.4 nm coexisting with a local row-wise antiferromagne...
[Phys. Rev. Lett. 108, 087205] Published Wed Feb 22, 2012
Author(s): Francesco Masia, Nicolò Accanto, Wolfgang Langbein, and Paola Borri
The dephasing time of the lowest bright exciton in CdSe/ZnS wurtzite quantum dots is measured from 5 to 170 K and compared with density dynamics within the exciton fine structure using a sensitive three-beam four-wave-mixing technique unaffected by spectral diffusion. Pure dephasing via acoustic pho...
[Phys. Rev. Lett. 108, 087401] Published Wed Feb 22, 2012
Author(s): Michael Rohlfing
Optical excitations of molecular systems can be modified by their physical environment. We analyze the underlying mechanisms within many-body perturbation theory, which is particularly suited to study nonlocal polarizability effects on the electronic structure. Here we focus on the example of a semi...
[Phys. Rev. Lett. 108, 087402] Published Wed Feb 22, 2012
Author(s): R. Valdés Aguilar, A. V. Stier, W. Liu, L. S. Bilbro, D. K. George, N. Bansal, L. Wu, J. Cerne, A. G. Markelz, S. Oh, and N. P. Armitage
We report the THz response of thin films of the topological insulator Bi2Se3. At low frequencies, transport is essentially thickness independent showing the dominant contribution of the surface electrons. Despite their extended exposure to ambient conditions, these surfaces exhibit robust properties...
[Phys. Rev. Lett. 108, 087403] Published Wed Feb 22, 2012
Author(s): Bernd Nöding and Sarah Köster
Intermediate filaments play a key role in cell mechanics. Apart from their great importance from a biomedical point of view, they also act as a very suitable micrometer-sized model system for semiflexible polymers. We perform a statistical analysis of the thermal fluctuations of individual filaments...
[Phys. Rev. Lett. 108, 088101] Published Wed Feb 22, 2012
Author(s): Vincent Tejedor, Raphael Voituriez, and Olivier Bénichou
We consider a minimal model of persistent random searcher with a short range memory. We calculate exactly for such a searcher the mean first-passage time to a target in a bounded domain and find that it admits a nontrivial minimum as function of the persistence length. This reveals an optimal search...
[Phys. Rev. Lett. 108, 088103] Published Wed Feb 22, 2012
Author(s): Abdel Ghani Oukhaled, Anne-Laure Biance, Juan Pelta, Loic Auvray, and Laurent Bacri
We investigate the entrance of single poly(ethylene glycol) chains into an α-hemolysin channel. We detect the frequency and duration of the current blockades induced by large neutral polymers, where chain radius is larger than pore diameter. In the semidilute regime, these chains pass only if the mo...
[Phys. Rev. Lett. 108, 088104] Published Wed Feb 22, 2012
Author(s): Ronald H. J. Otten and Paul van der Schoot
A theory is presented of how orienting fields and steric interactions conspire against the formation of a percolating network of, in some sense, connected elongated colloidal particles in fluid dispersions. We find that the network that forms above a critical loading breaks up again at higher loadin...
[Phys. Rev. Lett. 108, 088301] Published Wed Feb 22, 2012
Author(s): Alexandre Nicolas and Alexander Morozov
Recent experiments show that shear-banded flows of semidilute wormlike micelles in Taylor-Couette geometry exhibit a flow instability in the form of Taylor-like vortices. Here we perform the nonaxisymmetric linear stability analysis of the diffusive Johnson-Segalman model of shear banding and show t...
[Phys. Rev. Lett. 108, 088302] Published Wed Feb 22, 2012