@article{975,
abstract = {Recent numerical work by Bardarson, Pollmann, and Moore revealed a slow, logarithmic in time, growth of the entanglement entropy for initial product states in a putative many-body localized phase. We show that this surprising phenomenon results from the dephasing due to exponentially small interaction-induced corrections to the eigenenergies of different states. For weak interactions, we find that the entanglement entropy grows as ξln (Vt/), where V is the interaction strength, and ξ is the single-particle localization length. The saturated value of the entanglement entropy at long times is determined by the participation ratios of the initial state over the eigenstates of the subsystem. Our work shows that the logarithmic entanglement growth is a universal phenomenon characteristic of the many-body localized phase in any number of spatial dimensions, and reveals a broad hierarchy of dephasing time scales present in such a phase.},
author = {Maksym Serbyn and Papić, Zlatko and Abanin, Dmitry A},
journal = {Physical Review Letters},
number = {26},
publisher = {American Physical Society},
title = {{Universal slow growth of entanglement in interacting strongly disordered systems}},
doi = {10.1103/PhysRevLett.110.260601},
volume = {110},
year = {2013},
}
@article{976,
abstract = {Motivated by a search for experimental probes to access the physics of fractionalized excitations called spinons in spin liquids, we study the interaction of spinons with lattice vibrations. We consider the case of algebraic spin liquid, when spinons have fermionic statistics and a Dirac-like dispersion. We establish the general procedure for deriving spinon-phonon interactions, which is based on symmetry considerations. The procedure is illustrated for four different algebraic spin liquids: π-flux and staggered-flux phases on a square lattice, π-flux phase on a kagome lattice, and zero-flux phase on a honeycomb lattice. Although the low-energy description is similar for all these phases, different underlying symmetry groups lead to a distinct form of spinon-phonon interaction Hamiltonian. The explicit form of the spinon-phonon interaction is used to estimate the attenuation of ultrasound in an algebraic spin liquid. The prospects of the sound attenuation as a probe of spinons are discussed.},
author = {Maksym Serbyn and Lee, Patrick},
journal = {Physical Review B - Condensed Matter and Materials Physics},
number = {17},
publisher = {American Physical Society},
title = {{Spinon-phonon interaction in algebraic spin liquids}},
doi = {10.1103/PhysRevB.87.174424},
volume = {87},
year = {2013},
}
@inproceedings{1374,
abstract = {We study two-player zero-sum games over infinite-state graphs equipped with ωB and finitary conditions. Our first contribution is about the strategy complexity, i.e the memory required for winning strategies: we prove that over general infinite-state graphs, memoryless strategies are sufficient for finitary Büchi, and finite-memory suffices for finitary parity games. We then study pushdown games with boundedness conditions, with two contributions. First we prove a collapse result for pushdown games with ωB-conditions, implying the decidability of solving these games. Second we consider pushdown games with finitary parity along with stack boundedness conditions, and show that solving these games is EXPTIME-complete.},
author = {Chatterjee, Krishnendu and Fijalkow, Nathanaël},
booktitle = {22nd EACSL Annual Conference on Computer Science Logic},
location = {Torino, Italy},
pages = {181 -- 196},
publisher = {Schloss Dagstuhl - Leibniz-Zentrum für Informatik},
title = {{Infinite-state games with finitary conditions}},
doi = {10.4230/LIPIcs.CSL.2013.181},
volume = {23},
year = {2013},
}
@inproceedings{1385,
abstract = {It is often difficult to correctly implement a Boolean controller for a complex system, especially when concurrency is involved. Yet, it may be easy to formally specify a controller. For instance, for a pipelined processor it suffices to state that the visible behavior of the pipelined system should be identical to a non-pipelined reference system (Burch-Dill paradigm). We present a novel procedure to efficiently synthesize multiple Boolean control signals from a specification given as a quantified first-order formula (with a specific quantifier structure). Our approach uses uninterpreted functions to abstract details of the design. We construct an unsatisfiable SMT formula from the given specification. Then, from just one proof of unsatisfiability, we use a variant of Craig interpolation to compute multiple coordinated interpolants that implement the Boolean control signals. Our method avoids iterative learning and back-substitution of the control functions. We applied our approach to synthesize a controller for a simple two-stage pipelined processor, and present first experimental results.},
author = {Hofferek, Georg and Gupta, Ashutosh and Könighofer, Bettina and Jiang, Jie and Bloem, Roderick},
booktitle = {2013 Formal Methods in Computer-Aided Design},
location = {Portland, OR, United States},
pages = {77 -- 84},
publisher = {IEEE},
title = {{Synthesizing multiple boolean functions using interpolation on a single proof}},
doi = {10.1109/FMCAD.2013.6679394},
year = {2013},
}
@inproceedings{1387,
abstract = {Choices made by nondeterministic word automata depend on both the past (the prefix of the word read so far) and the future (the suffix yet to be read). In several applications, most notably synthesis, the future is diverse or unknown, leading to algorithms that are based on deterministic automata. Hoping to retain some of the advantages of nondeterministic automata, researchers have studied restricted classes of nondeterministic automata. Three such classes are nondeterministic automata that are good for trees (GFT; i.e., ones that can be expanded to tree automata accepting the derived tree languages, thus whose choices should satisfy diverse futures), good for games (GFG; i.e., ones whose choices depend only on the past), and determinizable by pruning (DBP; i.e., ones that embody equivalent deterministic automata). The theoretical properties and relative merits of the different classes are still open, having vagueness on whether they really differ from deterministic automata. In particular, while DBP ⊆ GFG ⊆ GFT, it is not known whether every GFT automaton is GFG and whether every GFG automaton is DBP. Also open is the possible succinctness of GFG and GFT automata compared to deterministic automata. We study these problems for ω-regular automata with all common acceptance conditions. We show that GFT=GFG⊃DBP, and describe a determinization construction for GFG automata.},
author = {Boker, Udi and Kuperberg, Denis and Kupferman, Orna and Skrzypczak, Michał},
location = {Riga, Latvia},
number = {PART 2},
pages = {89 -- 100},
publisher = {Springer},
title = {{Nondeterminism in the presence of a diverse or unknown future}},
doi = {10.1007/978-3-642-39212-2_11},
volume = {7966},
year = {2013},
}
@article{1442,
abstract = {We give a cohomological interpretation of both the Kac polynomial and the refined Donaldson-Thomas-invariants of quivers. This interpretation yields a proof of a conjecture of Kac from 1982 and gives a new perspective on recent work of Kontsevich-Soibelman. Thisis achieved by computing, via an arithmetic Fourier transform, the dimensions of the isotypical components of the cohomology of associated Nakajima quiver varieties under the action of a Weyl group. The generating function of the corresponding Poincare polynomials is an extension of Hua's formula for Kac polynomials of quivers involving Hall-Littlewood symmetric functions. The resulting formulae contain a wide range of information on the geometry of the quiver varieties.},
author = {Tamas Hausel and Letellier, Emmanuel and Rodríguez Villegas, Fernando},
journal = {Annals of Mathematics},
number = {3},
pages = {1147 -- 1168},
publisher = {Princeton University Press},
title = {{Positivity for Kac polynomials and DT-invariants of quivers}},
doi = {10.4007/annals.2013.177.3.8},
volume = {177},
year = {2013},
}
@inbook{1443,
abstract = {Here we survey several results and conjectures on the cohomology of the total space of the Hitchin system: the moduli space of semi-stable rank n and degree d Higgs bundles on a complex algebraic curve C. The picture emerging is a dynamic mixture of ideas originating in theoretical physics such as gauge theory and mirror symmetry, Weil conjectures in arithmetic algebraic geometry, representation theory of finite groups of Lie type and Langlands duality in number theory.},
author = {Tamas Hausel},
booktitle = {Handbook of Moduli: Volume II},
pages = {29 -- 70},
publisher = {International Press},
title = {{Global topology of the Hitchin system}},
volume = {25},
year = {2013},
}
@article{1470,
abstract = {We show that a natural isomorphism between the rational cohomology groups of the two zero-dimensional Hilbert schemes of n-points of two surfaces, the affine plane minus the axes and the cotangent bundle of an elliptic curve, exchanges the weight filtration on the first set of cohomology groups with the perverse Leray filtration associated with a natural fibration on the second set of cohomology groups. We discuss some associated hard Lefschetz phenomena.},
author = {De Cataldo, Mark A and Tamas Hausel and Migliorini, Luca},
journal = {Journal of Singularities},
pages = {23 -- 38},
publisher = {Worldwide Center of Mathematics},
title = {{Exchange between perverse and weight filtration for the Hilbert schemes of points of two surfaces}},
doi = {10.5427/jsing.2013.7c},
volume = {7},
year = {2013},
}
@article{3261,
abstract = {Cells in a developing embryo have no direct way of "measuring" their physical position. Through a variety of processes, however, the expression levels of multiple genes come to be correlated with position, and these expression levels thus form a code for "positional information." We show how to measure this information, in bits, using the gap genes in the Drosophila embryo as an example. Individual genes carry nearly two bits of information, twice as much as expected if the expression patterns consisted only of on/off domains separated by sharp boundaries. Taken together, four gap genes carry enough information to define a cell's location with an error bar of ~1% along the anterior-posterior axis of the embryo. This precision is nearly enough for each cell to have a unique identity, which is the maximum information the system can use, and is nearly constant along the length of the embryo. We argue that this constancy is a signature of optimality in the transmission of information from primary morphogen inputs to the output of the gap gene network.},
author = {Dubuis, Julien and Tkacik, Gasper and Wieschaus, Eric and Gregor, Thomas and Bialek, William},
journal = {PNAS},
number = {41},
pages = {16301 -- 16308},
publisher = {National Academy of Sciences},
title = {{Positional information, in bits}},
doi = {10.1073/pnas.1315642110},
volume = {110},
year = {2013},
}
@article{344,
abstract = {Copper-based selenides are attracting increasing interest due to their outstanding optoelectronic and thermoelectric properties. Herein a novel colloidal synthetic route to prepare Cu2SnSe3 nanocrystals with controlled size, shape and composition is presented. The high yield of the developed procedure allowed its up-scaling to the production of grams of colloidal Cu2SnSe3 nanocrystals. These nanocrystals were used as building blocks for the production of Cu2SnSe3 bulk nanostructured materials by spark plasma sintering. The thermoelectric properties of the prepared nanocrystalline Cu2SnSe3 pellets were characterized in the temperature range from 300 to 720 K. The obtained results show the bottom-up production of nanocrystalline materials from solution-processed nanocrystals to be a potentially advantageous alternative to conventional methods of production of efficient thermoelectric materials.},
author = {Ibanez, Maria and Cadavid, Doris and Anselmi-Tamburini, Umberto and Zamani, Reza R and Gorsse, Stéphane and Li, Wenhua and López, Antonio M and Morante, Joan R and Arbiol, Jordi and Cabot, Andreu},
journal = {Journal of Materials Chemistry A},
number = {4},
pages = {1421 -- 1426},
publisher = {Royal Society of Chemistry},
title = {{Colloidal synthesis and thermoelectric properties of Cu 2SnSe3 nanocrystals}},
doi = {10.1039/C2TA00419D},
volume = {1},
year = {2013},
}
@inproceedings{2048,
abstract = {Leakage resilient cryptography attempts to incorporate side-channel leakage into the black-box security model and designs cryptographic schemes that are provably secure within it. Informally, a scheme is leakage-resilient if it remains secure even if an adversary learns a bounded amount of arbitrary information about the schemes internal state. Unfortunately, most leakage resilient schemes are unnecessarily complicated in order to achieve strong provable security guarantees. As advocated by Yu et al. [CCS’10], this mostly is an artefact of the security proof and in practice much simpler construction may already suffice to protect against realistic side-channel attacks. In this paper, we show that indeed for simpler constructions leakage-resilience can be obtained when we aim for relaxed security notions where the leakage-functions and/or the inputs to the primitive are chosen non-adaptively. For example, we show that a three round Feistel network instantiated with a leakage resilient PRF yields a leakage resilient PRP if the inputs are chosen non-adaptively (This complements the result of Dodis and Pietrzak [CRYPTO’10] who show that if a adaptive queries are allowed, a superlogarithmic number of rounds is necessary.) We also show that a minor variation of the classical GGM construction gives a leakage resilient PRF if both, the leakage-function and the inputs, are chosen non-adaptively.},
author = {Faust, Sebastian and Pietrzak, Krzysztof Z and Schipper, Joachim},
booktitle = { Conference proceedings CHES 2012},
location = {Leuven, Belgium},
pages = {213 -- 232},
publisher = {Springer},
title = {{Practical leakage-resilient symmetric cryptography}},
doi = {10.1007/978-3-642-33027-8_13},
volume = {7428},
year = {2012},
}
@inproceedings{2049,
abstract = {We propose a new authentication protocol that is provably secure based on a ring variant of the learning parity with noise (LPN) problem. The protocol follows the design principle of the LPN-based protocol from Eurocrypt’11 (Kiltz et al.), and like it, is a two round protocol secure against active attacks. Moreover, our protocol has small communication complexity and a very small footprint which makes it applicable in scenarios that involve low-cost, resource-constrained devices.
Performance-wise, our protocol is more efficient than previous LPN-based schemes, such as the many variants of the Hopper-Blum (HB) protocol and the aforementioned protocol from Eurocrypt’11. Our implementation results show that it is even comparable to the standard challenge-and-response protocols based on the AES block-cipher. Our basic protocol is roughly 20 times slower than AES, but with the advantage of having 10 times smaller code size. Furthermore, if a few hundred bytes of non-volatile memory are available to allow the storage of some off-line pre-computations, then the online phase of our protocols is only twice as slow as AES.
},
author = {Heyse, Stefan and Kiltz, Eike and Lyubashevsky, Vadim and Paar, Christof and Pietrzak, Krzysztof Z},
booktitle = { Conference proceedings FSE 2012},
location = {Washington, DC, USA},
pages = {346 -- 365},
publisher = {Springer},
title = {{Lapin: An efficient authentication protocol based on ring-LPN}},
doi = {10.1007/978-3-642-34047-5_20},
volume = {7549},
year = {2012},
}
@article{2125,
abstract = {We consider a class of stochastic PDEs of Burgers type in spatial dimension 1, driven by space–time white noise. Even though it is well known that these equations are well posed, it turns out that if one performs a spatial discretization of the nonlinearity in the “wrong” way, then the sequence of approximate equations does converge to a limit, but this limit exhibits an additional correction term. This correction term is proportional to the local quadratic cross-variation (in space) of the gradient of the conserved quantity with the solution itself. This can be understood as a consequence of the fact that for any fixed time, the law of the solution is locally equivalent to Wiener measure, where space plays the role of time. In this sense, the correction term is similar to the usual Itô–Stratonovich correction term that arises when one considers different temporal discretizations of stochastic ODEs.},
author = {Hairer, Martin M and Jan Maas},
journal = {Annals of Probability},
number = {4},
pages = {1675 -- 1714},
publisher = {Institute of Mathematical Statistics},
title = {{A spatial version of the Itô-Stratonovich correction}},
doi = {10.1214/11-AOP662},
volume = {40},
year = {2012},
}
@article{2127,
abstract = {We study a new notion of Ricci curvature that applies to Markov chains on discrete spaces. This notion relies on geodesic convexity of the entropy and is analogous to the one introduced by Lott, Sturm, and Villani for geodesic measure spaces. In order to apply to the discrete setting, the role of the Wasserstein metric is taken over by a different metric, having the property that continuous time Markov chains are gradient flows of the entropy. Using this notion of Ricci curvature we prove discrete analogues of fundamental results by Bakry–Émery and Otto–Villani. Further, we show that Ricci curvature bounds are preserved under tensorisation. As a special case we obtain the sharp Ricci curvature lower bound for the discrete hypercube.},
author = {Erbar, Matthias and Jan Maas},
journal = {Archive for Rational Mechanics and Analysis},
number = {3},
pages = {997 -- 1038},
publisher = {Springer},
title = {{Ricci curvature of finite Markov chains via convexity of the entropy}},
doi = {10.1007/s00205-012-0554-z},
volume = {206},
year = {2012},
}
@article{2128,
abstract = {We introduce a technique for handling Whitney decompositions in Gaussian harmonic analysis and apply it to the study of Gaussian analogues of the classical tent spaces T 1,q of Coifman–Meyer–Stein.},
author = {Jan Maas and van Neerven, Jan M and Portal, Pierre},
journal = {Arkiv för Matematik},
number = {2},
pages = {379 -- 395},
publisher = {Springer},
title = {{Whitney coverings and the tent spaces T 1,q (γ) for the Gaussian measure}},
doi = {10.1007/s11512-010-0143-z},
volume = {50},
year = {2012},
}
@article{2151,
author = {Mikhail Lemeshko and Krems, Roman V and Weimer, Hendrik A},
journal = {Physical Review Letters},
number = {4},
publisher = {American Physical Society},
title = {{Erratum: Nonadiabatic preparation of spin crystals with ultracold polar molecules}},
doi = {10.1103/PhysRevLett.109.049901},
volume = {109},
year = {2012},
}
@article{2201,
abstract = {We study the growth dynamics of ordered structures of strongly interacting polar molecules in optical lattices. Using a dipole blockade of microwave excitations, we map the system onto an interacting spin-1/2 model possessing ground states with crystalline order, and describe a way to prepare these states by nonadiabatically driving the transitions between molecular rotational levels. The proposed technique bypasses the need to cross a phase transition and allows for the creation of ordered domains of considerably larger size compared to approaches relying on adiabatic preparation.},
author = {Mikhail Lemeshko and Krems, Roman V and Weimer, Hendrik},
journal = {Physical Review Letters},
number = {3},
publisher = {American Physical Society},
title = {{Nonadiabatic preparation of spin crystals with ultracold polar molecules}},
doi = {10.1103/PhysRevLett.109.035301},
volume = {109},
year = {2012},
}
@article{2202,
abstract = {We propose a method for sensitive parallel detection of low-frequency electromagnetic fields based on the fine structure interactions in paramagnetic polar molecules. Compared to the recently implemented scheme employing ultracold 87Rb atoms by Böhi, the technique based on molecules offers a 100-fold higher sensitivity, the possibility to measure both the electric and magnetic field components, and a probe of a wide range of frequencies from the dc limit to the THz regime.},
author = {Alyabyshev, Sergey V and Mikhail Lemeshko and Krems, Roman V},
journal = {Physical Review A - Atomic, Molecular, and Optical Physics},
number = {1},
publisher = {American Physical Society},
title = {{Sensitive imaging of electromagnetic fields with paramagnetic polar molecules}},
doi = {10.1103/PhysRevA.86.013409},
volume = {86},
year = {2012},
}
@article{2203,
abstract = {We show that the electric dipole-dipole interaction between a pair of polar molecules undergoes an all-out transformation when superimposed by a far-off-resonant optical field. The combined interaction potential becomes tunable by variation of wavelength, polarisation and intensity of the optical field and its dependence on the intermolecular separation exhibits a crossover from an inverse-power to an oscillating behaviour. The ability thereby offered to control molecular interactions opens up avenues toward the creation and manipulation of novel phases of ultracold polar gases among whose characteristics is a long-range entanglement of the dipoles' mutual orientation. We devised an accurate analytic model of such optical-field-dressed dipole-dipole interaction potentials, which enables a straightforward access to the optical-field parameters required for the design of intermolecular interactions in the laboratory.},
author = {Mikhail Lemeshko and Friedrich, Břetislav},
journal = {Molecular Physics},
number = {15-16},
pages = {1873 -- 1881},
publisher = {Taylor & Francis},
title = {{Interaction between polar molecules subject to a far-off-resonant optical field: Entangled dipoles up- or down-holding each other}},
doi = {10.1080/00268976.2012.689868},
volume = {110},
year = {2012},
}
@article{2263,
abstract = {Nestin-cre transgenic mice have been widely used to direct recombination to neural stem cells (NSCs) and intermediate neural progenitor cells (NPCs). Here we report that a readily utilized, and the only commercially available, Nestin-cre line is insufficient for directing recombination in early embryonic NSCs and NPCs. Analysis of recombination efficiency in multiple cre-dependent reporters and a genetic mosaic line revealed consistent temporal and spatial patterns of recombination in NSCs and NPCs. For comparison we utilized a knock-in Emx1cre line and found robust recombination in NSCs and NPCs in ventricular and subventricular zones of the cerebral cortices as early as embryonic day 12.5. In addition we found that the rate of Nestin-cre driven recombination only reaches sufficiently high levels in NSCs and NPCs during late embryonic and early postnatal periods. These findings are important when commercially available cre lines are considered for directing recombination to embryonic NSCs and NPCs.},
author = {Liang, Huixuan and Hippenmeyer, Simon and Ghashghaei, H.},
journal = {Biology open},
number = {12},
pages = {1200 -- 1203},
publisher = {The Company of Biologists},
title = {{A Nestin-cre transgenic mouse is insufficient for recombination in early embryonic neural progenitors}},
doi = {10.1242/bio.20122287},
volume = {1},
year = {2012},
}