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Showing 1 to 12 of 320 entries
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Concentration-Dependent Proton Transfer Mechanisms in Aqueous NaOH Solutions: From Acceptor-Driven to Donor-Driven and Back.

The journal of physical chemistry letters

Hellström M, Behler J.
PMID: 27504986
J Phys Chem Lett. 2016 Sep 01;7(17):3302-6. doi: 10.1021/acs.jpclett.6b01448. Epub 2016 Aug 11.

Proton transfer processes play an important role in many fields of chemistry. In dilute basic aqueous solutions, proton transfer from water molecules to hydroxide ions is aided by "presolvation", i.e., thermal fluctuations that modify the hydrogen-bonding environment around the...

Peeling by Nanomechanical Forces: A Route to Selective Creation of Surface Structures.

Physical review letters

Seema P, Behler J, Marx D.
PMID: 26230805
Phys Rev Lett. 2015 Jul 17;115(3):036102. doi: 10.1103/PhysRevLett.115.036102. Epub 2015 Jul 15.

An emerging route to nanostructured hybrid organic-metal interfaces with tailored properties is their manipulation by nanomechanical forces as exerted by STM and AFM tips. Yet, despite impressive experimental progress, close to nothing is known about the underlying atomistic mechanisms...

Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past.

Science (New York, N.Y.)

El-Maarry MR, Groussin O, Thomas N, Pajola M, Auger AT, Davidsson B, Hu X, Hviid SF, Knollenberg J, Güttler C, Tubiana C, Fornasier S, Feller C, Hasselmann P, Vincent JB, Sierks H, Barbieri C, Lamy P, Rodrigo R, Koschny D, Keller HU, Rickman H, A'Hearn MF, Barucci MA, Bertaux JL, Bertini I, Besse S, Bodewits D, Cremonese G, Da Deppo V, Debei S, De Cecco M, Deller J, Deshapriya JD, Fulle M, Gutierrez PJ, Hofmann M, Ip WH, Jorda L, Kovacs G, Kramm JR, Kührt E, Küppers M, Lara LM, Lazzarin M, Lin ZY, Lopez Moreno JJ, Marchi S, Marzari F, Mottola S, Naletto G, Oklay N, Pommerol A, Preusker F, Scholten F, Shi X.
PMID: 28325842
Science. 2017 Mar 31;355(6332):1392-1395. doi: 10.1126/science.aak9384. Epub 2017 Mar 21.

The Rosetta spacecraft spent ~2 years orbiting comet 67P/Churyumov-Gerasimenko, most of it at distances that allowed surface characterization and monitoring at submeter scales. From December 2014 to June 2016, numerous localized changes were observed, which we attribute to cometary-specific...

Bloch oscillations in the absence of a lattice.

Science (New York, N.Y.)

Meinert F, Knap M, Kirilov E, Jag-Lauber K, Zvonarev MB, Demler E, Nägerl HC.
PMID: 28572389
Science. 2017 Jun 02;356(6341):945-948. doi: 10.1126/science.aah6616.

The interplay of strong quantum correlations and far-from-equilibrium conditions can give rise to striking dynamical phenomena. We experimentally investigated the quantum motion of an impurity atom immersed in a strongly interacting one-dimensional Bose liquid and subject to an external...

Bloch state tomography using Wilson lines.

Science (New York, N.Y.)

Li T, Duca L, Reitter M, Grusdt F, Demler E, Endres M, Schleier-Smith M, Bloch I, Schneider U.
PMID: 27230376
Science. 2016 May 27;352(6289):1094-7. doi: 10.1126/science.aad5812.

Topology and geometry are essential to our understanding of modern physics, underlying many foundational concepts from high-energy theories, quantum information, and condensed-matter physics. In condensed-matter systems, a wide range of phenomena stem from the geometry of the band eigenstates,...

Single-band model of resonant inelastic x-ray scattering by quasiparticles in high-T(c) cuprate superconductors.

Physical review letters

Benjamin D, Klich I, Demler E.
PMID: 24996103
Phys Rev Lett. 2014 Jun 20;112(24):247002. doi: 10.1103/PhysRevLett.112.247002. Epub 2014 Jun 18.

We show that a simple model of noninteracting quasiparticles accurately describes resonant inelastic x-ray scattering (RIXS) experiments in the hole-doped cuprate superconductors. Band structure alone yields signatures previously attributed to collective magnetic modes, such as the dispersing peaks and...

First Principles Neural Network Potentials for Reactive Simulations of Large Molecular and Condensed Systems.

Angewandte Chemie (International ed. in English)

Behler J.
PMID: 28520235
Angew Chem Int Ed Engl. 2017 Oct 09;56(42):12828-12840. doi: 10.1002/anie.201703114. Epub 2017 Aug 18.

Modern simulation techniques have reached a level of maturity which allows a wide range of problems in chemistry and materials science to be addressed. Unfortunately, the application of first principles methods with predictive power is still limited to rather...

Interferometric measurements of many-body topological invariants using mobile impurities.

Nature communications

Grusdt F, Yao NY, Abanin D, Fleischhauer M, Demler E.
PMID: 27312285
Nat Commun. 2016 Jun 17;7:11994. doi: 10.1038/ncomms11994.

Topological quantum phases cannot be characterized by Ginzburg-Landau type order parameters, and are instead described by non-local topological invariants. Experimental platforms capable of realizing such exotic states now include synthetic many-body systems such as ultracold atoms or photons. Unique...

Depolarization Dynamics in a Strongly Interacting Solid-State Spin Ensemble.

Physical review letters

Choi J, Choi S, Kucsko G, Maurer PC, Shields BJ, Sumiya H, Onoda S, Isoya J, Demler E, Jelezko F, Yao NY, Lukin MD.
PMID: 28306313
Phys Rev Lett. 2017 Mar 03;118(9):093601. doi: 10.1103/PhysRevLett.118.093601. Epub 2017 Mar 03.

We study the depolarization dynamics of a dense ensemble of dipolar interacting spins, associated with nitrogen-vacancy centers in diamond. We observe anomalously fast, density-dependent, and nonexponential spin relaxation. To explain these observations, we propose a microscopic model where an...

Observation of discrete time-crystalline order in a disordered dipolar many-body system.

Nature

Choi S, Choi J, Landig R, Kucsko G, Zhou H, Isoya J, Jelezko F, Onoda S, Sumiya H, Khemani V, von Keyserlingk C, Yao NY, Demler E, Lukin MD.
PMID: 28277511
Nature. 2017 Mar 08;543(7644):221-225. doi: 10.1038/nature21426.

Understanding quantum dynamics away from equilibrium is an outstanding challenge in the modern physical sciences. Out-of-equilibrium systems can display a rich variety of phenomena, including self-organized synchronization and dynamical phase transitions. More recently, advances in the controlled manipulation of...

Mobile magnetic impurities in a Fermi superfluid: a route to designer molecules.

Physical review letters

Gopalakrishnan S, Parker CV, Demler E.
PMID: 25679897
Phys Rev Lett. 2015 Jan 30;114(4):045301. doi: 10.1103/PhysRevLett.114.045301. Epub 2015 Jan 28.

A magnetic impurity in a fermionic superfluid hosts bound quasiparticle states known as Yu-Shiba-Rusinov states. We argue here that, if the impurity is mobile (i.e., has a finite mass), the impurity and its bound Yu-Shiba-Rusinov quasiparticle move together as...

Anomalous diffusion and griffiths effects near the many-body localization transition.

Physical review letters

Agarwal K, Gopalakrishnan S, Knap M, Müller M, Demler E.
PMID: 25955037
Phys Rev Lett. 2015 Apr 24;114(16):160401. doi: 10.1103/PhysRevLett.114.160401. Epub 2015 Apr 23.

We explore the high-temperature dynamics of the disordered, one-dimensional XXZ model near the many-body localization (MBL) transition, focusing on the delocalized (i.e., "metallic") phase. In the vicinity of the transition, we find that this phase has the following properties:...

Showing 1 to 12 of 320 entries