Preprints

Refereed Articles

Notice on Publications: Local copies provided below are intended for personal, educational, or non-commercial research use only.

• Thivan M. Gunawardana, Ari M. Turner, Frank Schindler, and Ryan Barnett, Microscopic theory of Chern polarization via crystalline defect charge , J. Phys.: Condens. Matter 38 245602 (2026)
• Roy Rabaglia, Ryan Barnett, and Ari M. Turner, Unconventional Vortex Lattice and Topological Defects in Rigidly Rotating Multicomponent Superfluids , Phys. Rev. A 112, L051305 (2025)
• Thivan M. Gunawardana, Ari M. Turner, and Ryan Barnett, Optimally localized single-band Wannier functions for two-dimensional Chern insulators , Phys. Rev. Research (2024)
• Jonas Jager and Ryan Barnett, The effect of boson–boson interaction on the bipolaron formation , New J. Phys 24, 103032 (2022)
• Peru d’Ornellas, Ryan Barnett, and Derek K. K. Lee, Quantized bulk conductivity as a local Chern marker , Phys. Rev. B 106, 155124 (2022)
• Joseph Sykes and Ryan Barnett, 1D quasicrystals and topological markers , Mater. Quantum. Technol. 2 025005 (2022)
• Jonas Jager and Ryan Barnett, Stochastic-field approach to the quench dynamics of the one-dimensional Bose polaron , Phys. Rev. Research 3, 033212 (2021)
• Joseph Sykes and Ryan Barnett, Local Topological Markers in Odd Dimensions , Phys. Rev. B 103, 155134 (2021)
• J. Jager, R. Barnett, M. Will, and M. Fleischhauer, Strong-coupling Bose polarons in one dimension: Condensate deformation and modified Bogoliubov phonons , Phys. Rev. Research 2, 033142 (2020)
• Luca Mingarelli and Ryan Barnett, Exotic Vortex Lattices in Binary Repulsive Superfluids , Phys. Rev. Lett. 122, 045301 (2019)
• J. P. Wrubel, A. Schwettmann, D. P. Fahey, Z. Glassman, H. K. Pechkis, P. F. Griffin, R. Barnett, E. Tiesinga, and P. D. Lett, Spinor Bose-Einstein-condensate phase-sensitive amplifier for SU(1,1) interferometry , Phys. Rev. A 98, 023620 (2018)
• Luca Mingarelli, Eric E Keaveny, and Ryan Barnett, Vortex Lattices in Binary Mixtures of Repulsive Superfluids , Phys. Rev. A 97, 043622 (2018)
• Bogdan Galilo, Derek K. K. Lee, and Ryan Barnett, Topological Edge-State Manifestation of Interacting 2D Condensed Boson-Lattice Systems in a Harmonic Trap , Phys. Rev. Lett. 119, 203204 (2017)
• Sania Jevtic and Ryan Barnett, Frustration-free Hamiltonians supporting Majorana zero edge modes , New J. Phys. 19, 103034 (2017)
• Matjaž Payrits and Ryan Barnett, Quantum Rotor Theory of Systems of Spin-2 Bosons , Phys. Rev. A 94, 023605 (2016)
• Luca Mingarelli, Eric E Keaveny, and Ryan Barnett, Simulating Infinite Vortex Lattices in Superfluids , J. Phys.: Condens. Matter 28, 285201 (2016)
• Bogdan Galilo, Derek K. K. Lee, and Ryan Barnett, Selective Population of Edge States in a 2D Topological Band System , Phys. Rev. Lett. 115, 245302 (2015)
• Matjaž Payrits and Ryan Barnett, Order-by-modality degeneracy lifting of interacting bosons on the dice lattice , Phys. Rev. A 90, 013608 (2014)
• Ryan Barnett, Edge-state instabilities of bosons in a topological band , Phys. Rev. A 88, 063631 (2013)
• Hyewon K. Pechkis, Jonathan P. Wrubel, Arne Schwettmann, Paul F. Griffin, Ryan Barnett, Eite Tiesinga, and Paul D. Lett, Spinor dynamics in an antiferromagnetic spin-1 thermal Bose gas , Phys. Rev. Lett. 111, 025301 (2013)
• Hoi-Yin Hui, Ryan Barnett, J. V. Porto, and S. Das Sarma, Loop-structure stability of a double-well-lattice Bose-Einstein Condensate , Phys. Rev. A 86, 063636 (2012)
• Ryan Barnett, G. R. Boyd, and Victor Galitski, SU(3) spin-orbit coupling in systems of ultracold atoms , Phys. Rev. Lett. 109, 235308 (2012)
• Ryan Barnett, Stephen Powell, Tobias Grass, Maciej Lewenstein, and S. Das Sarma, Order by disorder in spin-orbit coupled Bose-Einstein Condensates , Phys. Rev. A 85, 023615 (2012) (See also erratum ).
• Hoi-Yin Hui, Ryan Barnett, Rajdeep Sensarma, and S. Das Sarma, Instabilities of bosonic spin currents in optical lattices , Phys. Rev. A 84, 043615 (2011)
• Ryan Barnett, Anatoli Polkovnikov, and Mukund Vengalattore, Prethermalization in quenched spinor condensates , Phys. Rev. A 84, 023606 (2011)
• Ryan Barnett, Hoi-Yin Hui, Chien-Hung Lin, Jay D. Sau, and S. Das Sarma, Quantum rotor theory of spinor condensates in tight traps , Phys. Rev. A 83, 023613 (2011)
• Stephen Powell, Ryan Barnett, Rajdeep Sensarma, and S. Das Sarma, Bogoliubov theory of interacting bosons on a lattice in a synthetic magnetic field , Phys. Rev. A 83, 013612 (2011)
• Yue Zou, Ryan Barnett, and Gil Refael, Particle-hole symmetric localization in optical lattices using time modulated random on-site potentials , Phys. Rev. B 82, 224205 (2010)
• Ryan Barnett, Jay D. Sau, and S. Das Sarma, Antiferromagnetic spinor condensates are quantum rotors , Phys. Rev. A (Rapid Commun.) 82, 031602 (2010)
• Stephen Powell, Ryan Barnett, Rajdeep Sensarma, and S. Das Sarma, Interacting Hofstadter spectrum of bosons in an artificial gauge field , Phys. Rev. Lett. 104, 255303 (2010)
• Ryan Barnett, Edward Chen, and Gil Refael, Vortex synchronization in Bose-Einstein Condensates: A time-dependent Gross-Pitaevskii Equation approach , New J. Phys. 12, 043004 (2010)
• Ryan Barnett, Daniel Podolsky, and Gil Refael, A geometrical approach to hydrodynamics and low-energy excitations of spinor condensates , Phys. Rev. B 80, 024420 (2009)
• Ryan Barnett, Subroto Mukerjee, and Joel Moore, Vortex lattice transitions in cyclic spinor condensates , Phys. Rev. Lett. 100, 240405 (2008)
• Ryan Barnett, Gil Refael, Mason Porter, and Hans Peter Büchler, Vortex lattice locking in rotating two-component Bose-Einstein Condensates , New J. Phys. 10, 043030 (2008)
• Ari Turner, Ryan Barnett, Eugene Demler, and Ashvin Vishwanath, Nematic order by disorder in spin-2 BECs , Phys. Rev. Lett. 98, 190404 (2007)
• Ryan Barnett, Ari Turner, and Eugene Demler, Classifying vortices in S=3 Bose-Einstein Condensates , Phys. Rev. A 76, 013605 (2007)
• Ryan Barnett, Paul Maragakis, Ari Turner, Maria Fyta, and Efthimios Kaxiras, Multiscale model of electronic behavior and localization in stretched dry DNA , J. Mater. Sci. 42, 8894 (2007)
• Ryan Barnett, Ari Turner, and Eugene Demler, Classifying novel phases of spinor atoms , Phys. Rev. Lett. 97, 180412 (2006)
• Ryan Barnett, Dmitry Petrov, Mikhail Lukin, and Eugene Demler, Quantum magnetism with multicomponent dipolar molecules in an optical lattice , Phys. Rev. Lett. 96, 190401 (2006)
• Ryan Barnett, Anatoli Polkovnikov, Eugene Demler, Wei-Guo Yin, and Wei Ku, Coexistence of gapless excitations and commensurate charge-density wave in the 2H-transition metal dichalcogenides , Phys. Rev. Lett. 96, 026406 (2006)
• Ryan Barnett, Eugene Demler, and Efthimios Kaxiras, Superconducting and charge-density wave instabilities in ultrasmall-radius carbon nanotubes , Solid State Commun. 135, 335 (2005)
• Ryan Barnett, Eugene Demler, and Efthimios Kaxiras, Electron-phonon interaction in ultrasmall-radius carbon nanotubes , Phys. Rev. B 71, 035429 (2005)
• S. Cronin, R. Barnett, S. G. Chou, O. Rabin, A. K. Swan, S. Unlu, B. B. Goldberg, M. S. Dresselhaus, and M. Tinkham, Electrochemical gating of individual carbon SWNTs observed by transport measurements and resonant confocal micro-raman spectroscopy , Appl. Phys. Lett. 84, 2052 (2004)
• A. Z. Hartman, M. Jouzi, R. Barnett, and J. M. Xu, Theoretical and experimental studies of carbon nanotube electro-mechanical coupling , Phys. Rev. Lett. 92, 236804 (2004)
• Paul Maragakis, Ryan Barnett, Efthimios Kaxiras, Marcus Elstner, and Thomas Frauenheim, Electronic structure of overstretched DNA , Phys. Rev. B (Rapid Commun.) 66, 241104(R) (2002)
• Ryan Barnett and George Gibson, Static field tunneling ionization of H ₂ ⁺ , Phys. Rev. A 59, 4843 (1999)

PhD Theses

• Peru d'Ornellas, Topology on Almost Any Lattice , Imperial College London (2024)
• Jonas Jager, Impurities in ultracold quantum gases: From polaron formation to mediated interactions , Imperial College London (2022)
• Joseph Sykes, Topological Insulators and their Topological Markers , Imperial College London (2022)
• Luca Mingarelli, Simulating infinite vortex lattices in superfluids: a novel scheme and its applications , Imperial College London (2018)
• Bogdan Galilo, Topological spin dynamics in 2D Bose Lattices , Imperial College London (2017)
• Matjaž Payrits, Order-by-Disorder Phenomena in Cold Atomic Gases , Imperial College London (2016)
• Ryan Barnett, Studies of strongly correlated systems: from first-principles computations to effective Hamiltonians and novel quantum phases , Harvard University (2006)