Thomas Bilitewski

Max Planck Society

Quantum spin liquidButterfly effectEnergy landscapePhysicsStar formationLattice (order)AntiferromagnetismAngular momentumHamiltonian (quantum mechanics)AmplitudeMaxima and minimaFermi Gamma-ray Space TelescopeScatteringLyapunov exponentFlatteningSuperfluidityFermi energyCondensed matter physicsInflowPopulationMany bodyQuantum electrodynamicsMoleculeSpin statesFrustrationGauge (firearms)Symmetry (physics)Fermi liquid theoryFermionSpin (physics)Floquet theoryQuantum mechanicsDegenerate energy levelsSpin-½QuantumFermi gasPhase diagramCoulombOptical latticeMetallicity

25Publications

8H-index

243Citations

Publications 28

#1Lindsay Sonderhouse (CU: University of Colorado Boulder)H-Index: 11

#2Christian Sanner (CU: University of Colorado Boulder)H-Index: 19

Last. Jun Ye (CU: University of Colorado Boulder)H-Index: 126

view all 9 authors...

Many-body quantum systems can exhibit a striking degree of symmetry unparallelled in their classical counterparts. In real materials SU(N) symmetry is an idealization, but this symmetry is pristinely realized in fully controllable ultracold alkaline-earth atomic gases. Here, we study an SU(N)-symmetric Fermi liquid of 87Sr atoms, where N can be tuned to be as large as 10. In the deeply degenerate regime, we show through precise measurements of density fluctuations and expansion dynamics that the...

#1Thomas BilitewskiH-Index: 8

#2Lindsay SonderhouseH-Index: 11

Last. Jun YeH-Index: 126

view all 9 authors...

#1Lindsay SonderhouseH-Index: 11

#2Christian SannerH-Index: 19

Last. Jun YeH-Index: 126

view all 9 authors...

#1Thomas BilitewskiH-Index: 8

#2Subhro BhattacharjeeH-Index: 17

Last. Roderich MoessnerH-Index: 68

view all 3 authors...

#1Thomas Bilitewski (MPG: Max Planck Society)H-Index: 8

#2M. E. Zhitomirsky (UGA: University of Grenoble)H-Index: 4

Last. Roderich Moessner (MPG: Max Planck Society)H-Index: 68

view all 3 authors...

We study the low temperature static and dynamical properties of the classical bond-disordered antiferromagnetic Heisenberg model on the kagome lattice. This model has recently been shown to host a new type of spin liquid exhibiting an exponentially large number of discrete ground states. Surprisingly, despite the rigidity of the groundstates, we establish the vanishing of the corresponding spin stiffness. Locally, the low-lying eigenvectors of the Hessian appear to exhibit a fractal inverse part...

#1Thomas Bilitewski (MPG: Max Planck Society)H-Index: 8

#2Roderich Moessner (MPG: Max Planck Society)H-Index: 68

We study two models of correlated bond- and site-disorder on the kagome lattice considering both translationally invariant and completely disordered systems. The models are shown to exhibit a perfectly flat ground state band in the presence of disorder for which we provide exact analytic solutions. Whereas in one model the flat band remains gapped and touches the dispersive band, the other model has a finite gap, demonstrating that the band touching is not protected by topology alone. Our model ...

#1L. OpherdenH-Index: 8

#2Thomas BilitewskiH-Index: 8

Last. J. Wosnitza (TUD: Dresden University of Technology)H-Index: 26

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Magnetic remanence - found in bar magnets or magnetic storage devices - is probably the oldest and most ubiquitous phenomenon underpinning technological applications of magnetism. It is a macroscopic non-equilibrium phenomenon: a remanent magnetisation appears when a magnetic field is applied to an initially unmagnetised ferromagnet, and then taken away. Here, we present an inverted magnetic hysteresis loop in the pyrochlore compound Nd_2f_2_7 the remanent magnetisation points in a dire...

#1Thomas Bilitewski (MPG: Max Planck Society)H-Index: 8

#2Subhro Bhattacharjee (TIFR: Tata Institute of Fundamental Research)H-Index: 17

Last. Roderich Moessner (MPG: Max Planck Society)H-Index: 68

view all 3 authors...

We study the chaotic dynamics in a classical many-body system of interacting spins on the kagome lattice. We characterise many-body chaos via the butterfly effect as captured by an appropriate out-of-time-ordered correlator. Due to the emergence of a spin liquid phase, the chaotic dynamics extends all the way to zero temperature. We thus determine the full temperature dependence of two complementary aspects of the butterfly effect: the Lyapunov exponent, \mu and the butterfly speed, v_b an...

#1Thomas BilitewskiH-Index: 8

#2M. E. ZhitomirskyH-Index: 32

Last. Roderich MoessnerH-Index: 68

view all 3 authors...

#1Thomas Bilitewski (MPG: Max Planck Society)H-Index: 8

#2M. E. Zhitomirsky (UGA: University of Grenoble)H-Index: 4

Last. Roderich Moessner (MPG: Max Planck Society)H-Index: 68

view all 3 authors...

We study a class of disordered continuous classical spin systems including the kagome Heisenberg magnet. While each term in its local Hamiltonian can be independently minimised, we find {\it discrete} degenerate ground states whose number grows exponentially with system size. These states do not exhibit zero-energy `excitations' characteristic of highly frustrated magnets but instead are local minima of the energy landscape, albeit with an anomalously soft excitation spectrum. This represents a ...

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