• 2024
• 2023
• 2022
• 2021
• 2020
• 2019
• 2018
• 2017
• 2016
• 2015
• 2014
• 2013
• 2012
• 2011
• 2010
• 2009

2024

• Bröker, S., te Vrugt, M., Jeggle, J., Stenhammar, J. and Wittkowski, R., 2024. Pair-distribution function of active Brownian spheres in three spatial dimensions: Simulation results and analytical representation: Soft Matter, 20, pp. 224–244. doi: 10.1039/D3SM00987D.

2023

• te Vrugt, M. and Wittkowski, R., 2023. Perspective: New directions in dynamical density functional theory: Journal of Physics: Condensed Matter, 35(4), Article 041501 doi: 10.1088/1361-648X/ac8633.
• Schmitz, G.J., te Vrugt, M., Haug-Warberg, T., Ellingsen, L., Needham, P. and Wittkowski, R., 2023. Thermodynamics of an Empty Box: Entropy, 25(2), Article 315 doi: 10.3390/e25020315.
• te Vrugt, ., Frohoff-Hülsmann, ., Heifetz, ., Thiele, . and Wittkowski, ., 2023. From a microscopic inertial active matter model to the Schrödinger equation: Nature Communications, 14, Article 1302 doi: 10.1038/s41467-022-35635-1.
• Bröker, S., Bickmann, J., te Vrugt, M., Cates, M.E. and Wittkowski, R., 2023. Orientation-dependent propulsion of active Brownian spheres: from self-advection to programmable cluster shapes: Physical Review Letters, 131(16), Article 168203 doi: 10.1103/PhysRevLett.131.168203.
• Bickmann, J., Bröker, S., te Vrugt, M. and Wittkowski, R., 2023. Active Brownian particles in external force fields: field-theoretical models, generalized barometric law, and programmable density patterns: Physical Review E, 108(4), Article 044601 doi: 10.1103/PhysRevE.108.044601.
• Deng, Y., Paskert, A., Zhang, Z., Wittkowski, R. and Ahmed, D., 2023. An acoustically controlled helical microrobot: Science advances, 9(38), Article eadh526 doi: 10.1126/sciadv.adh5260.
• Voß, J. and Wittkowski, R., 2023. Dependence of the acoustic propulsion of nano- and microcones on their orientation and aspect ratio: Scientific Reports, 13, Article 12858 doi: 10.1038/s41598-023-39231-1.
• te Vrugt, M., Bickmann, J. and Wittkowski, R., 2023. How to derive a predictive field theory for active Brownian particles: A step-by-step tutorial: Journal of Physics: Condensed Matter, 35(31), Article 313001 doi: 10.1088/1361-648X/acc440.
• Evers, M. and Wittkowski, R., 2023. An active colloidal system showing parallels to a time crystal: Physica Scripta, 98(12), Article 125240 doi: 10.1088/1402-4896/ad05ab.

2022

• Raghuraman, ., Schubert, .S., Bröker, ., Jurado, ., Müller, ., Brandt, ., Vos, .E., Hofemeier, .D., Abbasi, ., Stehling, ., Wittkowski, ., Ivaska, . and Betz, ., 2022. Pressure drives rapid burst-like coordinated cellular motion from 3D cancer aggregates: Advanced Science, 9(6), p. 2104808. doi: 10.1002/advs.202104808.
• Voß, . and Wittkowski, ., 2022. Acoustically propelled nano- and microcones: fast forward and backward motion: Nanoscale Advances, 4(1), pp. 281–293. doi: 10.1039/D1NA00655J.
• Voß, J. and Wittkowski, R., 2022. Orientation-dependent propulsion of triangular nano- and microparticles by a traveling ultrasound wave: ACS Nano, 16(3), pp. 3604–3612. doi: 10.1021/acsnano.1c02302.
• Voß, J. and Wittkowski, R., 2022. Propulsion of bullet- and cup-shaped nano- and microparticles by traveling ultrasound waves: Physics of Fluids, 34(5), Article 052007 doi: 10.1063/5.0089367.
• Monderkamp, .A., Wittmann, ., te Vrugt, ., Voigt, ., Wittkowski, . and Löwen, ., 2022. Topological fine structure of smectic grain boundaries and tetratic disclination lines within three-dimensional smectic liquid crystals: Physical Chemistry Chemical Physics, 24(26), pp. 15691–15704. doi: 10.1039/D2CP00060A.
• Bickmann, J., Bröker, S., Jeggle, J. and Wittkowski, R., 2022. Analytical approach to chiral active systems: suppressed phase separation of interacting Brownian circle swimmers: Journal of Chemical Physics, 156(19), Article 194904 doi: 10.1063/5.0085122.
• Nitschke, T., Stenhammar, J. and Wittkowski, R., 2022. Collective guiding of acoustically propelled nano- and microparticles: Nanoscale Advances, 4(13), pp. 2844–2856. doi: 10.1039/D2NA00007E.
• Voß, J. and Wittkowski, R., 2022. Acoustic propulsion of nano- and microcones: dependence on the viscosity of the surrounding fluid: Langmuir, 38(35), pp. 10736–10748. doi: 10.1021/acs.langmuir.2c00603.
• Mayer Martins, J. and Wittkowski, R., 2022. Inertial dynamics of an active Brownian particle: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 106(3), Article 034616 doi: 10.1103/PhysRevE.106.034616.
• te Vrugt, ., Holl, .P., Koch, ., Wittkowski, . and Thiele, ., 2022. Derivation and analysis of a phase field crystal model for a mixture of active and passive particles: Modelling and Simulation in Materials Science and Engineering, 30(8), Article 084001 doi: 10.1088/1361-651X/ac856a.
• Evers, M., Wittkowski, R. and Linsen, L., 2022. ASEVis: Visual Exploration of Active System Ensembles to Define Characteristic Measures. in: - eds. 2022 IEEE Visualization and Visual Analytics (VIS). New York City: Wiley-IEEE Press. pp. 150–154. doi: 10.1109/VIS54862.2022.00039.

2021

• Michael, t.V., Bickmann, J. and Wittkowski, R., 2021. Containing a pandemic: nonpharmaceutical interventions and the 'second wave': Journal of Physics Communications, 5(5), p. 055008. doi: 10.1088/2399-6528/abf79f.
• te, V.M., Hossenfelder, . and Wittkowski, ., 2021. Mori-Zwanzig formalism for general relativity: a new approach to the averaging problem: Physical Review Letters, 127(23), p. 231101. doi: 10.1103/PhysRevLett.127.231101.
• te, V.M., Tóth, .I. and Wittkowski, ., 2021. Master equations for Wigner functions with spontaneous collapse and their relation to thermodynamic irreversibility: Journal of Computational Electronics, 20(6), pp. 2209–2231. doi: 10.1007/s10825-021-01804-6.
• te, V.M., Jeggle, . and Wittkowski, ., 2021. Jerky active matter: a phase field crystal model with translational and orientational memory: New Journal of Physics, 23(6), p. 063023. doi: 10.1088/1367-2630/abfa61.

2020

• Jeggle, J., Stenhammar, J. and Wittkowski, R., 2020. Pair-distribution function of active Brownian spheres in two spatial dimensions: simulation results and analytic representation: Journal of Chemical Physics, 152(19), p. 194903. doi: 10.1063/1.5140725.
• Michael, t.V. and Wittkowski, R., 2020. Relations between angular and Cartesian orientational expansions: AIP Advances, 10(3), p. 035106. doi: 10.1063/1.5141367.
• Bickmann, J. and Wittkowski, R., 2020. Predictive local field theory for interacting active Brownian spheres in two spatial dimensions: Journal of Physics: Condensed Matter, 32(21), p. 214001. doi: 10.1088/1361-648X/ab5e0e.
• Voß, . and Wittkowski, ., 2020. On the shape-dependent propulsion of nano- and microparticles by traveling ultrasound waves: Nanoscale Advances, 2(9), pp. 3890–3899. doi: 10.1039/D0NA00099J.
• Sprenger, .R., Fernandez-Rodriguez, .A., Alvarez, ., Isa, ., Wittkowski, . and Löwen, ., 2020. Active Brownian motion with orientation-dependent motility: theory and experiments: Langmuir, 36(25), pp. 7066–7073. doi: 10.1021/acs.langmuir.9b03617.
• Bickmann, J. and Wittkowski, R., 2020. Collective dynamics of active Brownian particles in three spatial dimensions: a predictive field theory: Physical Review Research, 2(3), p. 033241. doi: 10.1103/PhysRevResearch.2.033241.
• te, V.M. and Wittkowski, ., 2020. Projection operators in statistical mechanics: a pedagogical approach: European Journal of Physics, 41(1), p. 045101. doi: 10.1088/1361-6404/ab8e28.
• te, V.M., Löwen, . and Wittkowski, ., 2020. Classical dynamical density functional theory: from fundamentals to applications: Advances in Physics, 69(2), pp. 121–247. doi: 10.1080/00018732.2020.1854965.
• te, V.M. and Wittkowski, ., 2020. Orientational order parameters for arbitrary quantum systems: Annalen der Physik, 532(12), p. 2000266. doi: 10.1002/andp.202000266.
• te, V.M., Bickmann, . and Wittkowski, ., 2020. Effects of social distancing and isolation on epidemic spreading modeled via dynamical density functional theory: Nature Communications, 11, p. 5576. doi: 10.1038/s41467-020-19024-0.

2019

• te, V.M. and Wittkowski, ., 2019. Mori-Zwanzig projection operator formalism for far-from-equilibrium systems with time-dependent Hamiltonians: Physical Review E - Statistical, nonlinear, and soft matter physics, 99(6), p. 062118. doi: 10.1103/PhysRevE.99.062118.

2018

• Sitta, .E., Smallenburg, ., Wittkowski, . and Löwen, ., 2018. Liquid crystals of hard rectangles on flat and cylindrical manifolds: Physical Chemistry Chemical Physics, 20(7), pp. 5285–5294. doi: 10.1039/C7CP07026H.
• Praetorius, ., Voigt, ., Wittkowski, . and Löwen, ., 2018. Active crystals on a sphere: Physical Review E - Statistical, nonlinear, and soft matter physics, Vol. 97, Iss. 5 — May 2018 doi: 10.1103/PhysRevE.97.052615.
• Voß, . and Wittkowski, ., 2018. Hydrodynamic resistance matrices of colloidal particles with various shapes: arXiv.org, 2018
• Praetorius, ., Voigt, ., Wittkowski, . and Löwen, ., 2018. Active crystals on a sphere: Physical Review E, 97(5), p. 052615. doi: 10.1103/PhysRevE.97.052615.

2017

• Wittkowski, ., Stenhammar, . and Cates, .E., 2017. Nonequilibrium dynamics of mixtures of active and passive colloidal particles: New Journal of Physics, 19(10), p. 105003. doi: 10.1088/1367-2630/aa8195.
• Campbell, .I., Wittkowski, ., ten, H.B., Löwen, . and Ebbens, .J., 2017. Helical paths, gravitaxis, and separation phenomena for mass-anisotropic self-propelling colloids: experiment versus theory: Journal of Chemical Physics, 147(8), p. 084905. doi: 10.1063/1.4998605.

2016

• Sitta, .E., Smallenburg, ., Wittkowski, . and Löwen, ., 2016. Hard rectangles near curved hard walls: tuning the sign of the Tolman length: Journal of Chemical Physics, 145(20), p. 204508. doi: 10.1063/1.4967876.
• Glanz, ., Wittkowski, . and Löwen, ., 2016. Symmetry breaking in clogging for oppositely driven particles: Physical Review E, 94(5), p. 052606. doi: 10.1103/PhysRevE.94.052606.
• Stenhammar, ., Wittkowski, ., Marenduzzo, . and Cates, .E., 2016. Light-induced self-assembly of active rectification devices: Science advances, 2, p. e1501850. doi: 10.1126/sciadv.1501850.

2015

• Tiribocchi, ., Wittkowski, ., Marenduzzo, . and Cates, .E., 2015. Active Model H: scalar active matter in a momentum-conserving fluid: Physical Review Letters, 115, p. 188302. doi: 10.1103/PhysRevLett.115.188302.
• Solon, .P., Stenhammar, ., Wittkowski, ., Kardar, ., Kafri, ., Cates, .E. and Tailleur, ., 2015. Pressure and phase equilibria in interacting active Brownian spheres: Physical Review Letters, 114, p. 198301. doi: 10.1103/PhysRevLett.114.198301.
• ten, H.B., Wittkowski, ., Takagi, ., Kümmel, ., Bechinger, . and Löwen, ., 2015. Can the self-propulsion of anisotropic microswimmers be described by using forces and torques?: Journal of Physics: Condensed Matter, 27, p. 194110. doi: 10.1088/0953-8984/27/19/194110.
• Stenhammar, ., Wittkowski, ., Marenduzzo, . and Cates, .E., 2015. Activity-induced phase separation and self-assembly in mixtures of active and passive particles: Physical Review Letters, 114, p. 018301. doi: 10.1103/PhysRevLett.114.018301.

2014

• ten, H.B., Kümmel, ., Wittkowski, ., Takagi, ., Löwen, . and Bechinger, ., 2014. Gravitaxis of asymmetric self-propelled colloidal particles: Nature Communications, 5, p. 4829. doi: 10.1038/ncomms5829.
• Kümmel, ., ten, H.B., Wittkowski, ., Takagi, ., Buttinoni, ., Eichhorn, ., Volpe, ., Löwen, . and Bechinger, ., 2014. Reply to “Comment on ‘Circular motion of asymmetric self-propelling particles’ ”: Physical Review Letters, 113, p. 029802. doi: 10.1103/PhysRevLett.113.029802.
• Wittkowski, ., Tiribocchi, ., Stenhammar, ., Allen, .J., Marenduzzo, . and Cates, .E., 2014. Scalar ϕ^4 field theory for active-particle phase separation: Nature Communications, 5, p. 4351. doi: 10.1038/ncomms5351.

2013

• Kraft, .J., Wittkowski, ., ten, H.B., Edmond, .V., Pine, .J. and Löwen, ., 2013. Brownian motion and the hydrodynamic friction tensor for colloidal particles of complex shape: Physical Review E, 88, p. 050301(R). doi: 10.1103/PhysRevE.88.050301.
• Tarama, ., Menzel, .M., ten, H.B., Wittkowski, ., Ohta, . and Löwen, ., 2013. Dynamics of a deformable active particle under shear flow: Journal of Chemical Physics, 139, p. 104906. doi: 10.1063/1.4820416.
• Wittkowski, ., Löwen, . and Brand, .R., 2013. Microscopic approach to entropy production: Journal of Physics A: Mathematical and Theoretical, 46, p. 355003. doi: 10.1088/1751-8113/46/35/355003.
• Praetorius, ., Voigt, ., Wittkowski, . and Löwen, ., 2013. Structure and dynamics of interfaces between two coexisting liquid-crystalline phases: Physical Review E, 87, p. 052406. doi: 10.1103/PhysRevE.87.052406.
• Kümmel, ., ten, H.B., Wittkowski, ., Buttinoni, ., Eichhorn, ., Volpe, ., Löwen, . and Bechinger, ., 2013. Circular motion of asymmetric self-propelling particles: Physical Review Letters, 110, p. 198302. doi: 10.1103/PhysRevLett.110.198302.
• Wensink, .H., Löwen, ., Marechal, ., Härtel, ., Wittkowski, ., Zimmermann, ., Kaiser, . and Menzel, .M., 2013. Differently shaped hard body colloids in confinement: from passive to active particles: European Physical Journal Special Topics, 222, pp. 3023–3037. doi: 10.1140/epjst/e2013-02073-0.

2012

• Wittkowski, ., Löwen, . and Brand, .R., 2012. Extended dynamical density functional theory for colloidal mixtures with temperature gradients: Journal of Chemical Physics, 137, p. 224904. doi: 10.1063/1.4769101.
• Wittkowski, . and Löwen, ., 2012. Self-propelled Brownian spinning top: dynamics of a biaxial swimmer at low Reynolds numbers: Physical Review E, 85, p. 021406. doi: 10.1103/PhysRevE.85.021406.
• Emmerich, ., Löwen, ., Wittkowski, ., Gruhn, ., Tóth, .I., Tegze, . and Gránásy, ., 2012. Phase-field-crystal models for condensed matter dynamics on atomic length and diffusive time scales: an overview: Advances in Physics, 61, pp. 665–743. doi: 10.1080/00018732.2012.737555.
• R., W., 2012. Brownian dynamics of active and passive anisotropic colloidal particles. Düren: Shaker Verlag. doi: 10.2370/9783844013689.

2011

• Wittkowski, . and Löwen, ., 2011. Dynamical density functional theory for colloidal particles with arbitrary shape: Molecular Physics, 109, pp. 2935–2943. doi: 10.1080/00268976.2011.609145.
• Wittkowski, ., Löwen, . and Brand, .R., 2011. Microscopic and macroscopic theories for the dynamics of polar liquid crystals: Physical Review E, 84, p. 041708. doi: 10.1103/PhysRevE.84.041708.
• ten, H.B., Wittkowski, . and Löwen, ., 2011. Brownian dynamics of a self-propelled particle in shear flow: Physical Review E, 84, p. 031105. doi: 10.1103/PhysRevE.84.031105.
• Achim, .V., Wittkowski, . and Löwen, ., 2011. Stability of liquid crystalline phases in the phase-field-crystal model: Physical Review E, 83, p. 061712. doi: 10.1103/PhysRevE.83.061712.
• Wittkowski, ., Löwen, . and Brand, .R., 2011. Polar liquid crystals in two spatial dimensions: the bridge from microscopic to macroscopic modeling: Physical Review E, 83, p. 061706. doi: 10.1103/PhysRevE.83.061706.

2010

• Wittkowski, ., Löwen, . and Brand, .R., 2010. Derivation of a three-dimensional phase-field-crystal model for liquid crystals from density functional theory: Physical Review E, 82, p. 031708. doi: 10.1103/PhysRevE.82.031708.

2009

• Wittkowski, ., Schelin, .B. and Spatschek, .H., 2009. Mean motion in stochastic plasmas with a space-dependent diffusion coefficient: Contributions to Plasma Physics, 49, pp. 55–69. doi: 10.1002/ctpp.200910009.