Publications

Preprints

Roy Rabaglia, Ryan Barnett, and Ari M. Turner, Unvortex Lattice and Topological Defects in Rigidly Rotating Multicomponent Superfluids, arXiv:2404.05857

Refereed Articles

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-disorder 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, 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, 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 H₂⁺, Phys. Rev. A 59, 4843 (1999)

PhD Theses

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)