All Stories

  1. Tunable coupler to fully decouple and maximally localize superconducting qubits

    Article • Physical Review Applied, December 2023, American Physical Society (APS)

    Michael Hartmann

  2. Problem-specific classical optimization of Hamiltonian simulation

    Article • Physical Review Research, October 2023, American Physical Society (APS)

    Michael Hartmann

  3. Variational Hamiltonian simulation for translational invariant systems via classical pre-processing

    Article • Quantum Science and Technology, January 2023, Institute of Physics Publishing

    Michael Hartmann

  4. Variational quantum eigensolver ansatz for the J1−J2

    Article • October 2022, American Physical Society (APS)

    Michael Hartmann

  5. Direct implementation of a perceptron in superconducting circuit quantum hardware

    Article • Physical Review Research, September 2022, American Physical Society (APS)

    Michael Hartmann

  6. Single shot i-Toffoli gate in dispersively coupled superconducting qubits

    Article • Applied Physics Letters, January 2022, American Institute of Physics

    Aneirin Baker, Michael Hartmann

  7. Superconducting quantum many-body circuits for quantum simulation and computing

    Article • Applied Physics Letters, June 2020, American Institute of Physics

    Michael Hartmann

  8. Quantum supremacy using a programmable superconducting processor

    Article • Nature, October 2019, Springer Science + Business Media

    Michael Hartmann

  9. Neural-Network Approach to Dissipative Quantum Many-Body Dynamics

    Article • Physical Review Letters, June 2019, American Physical Society (APS)

    Michael Hartmann

  10. Observation of the Crossover from Photon Ordering to Delocalization in Tunably Coupled Resonators

    Article • Physical Review Letters, May 2019, American Physical Society (APS)

    Michael Hartmann

  11. Floquet engineering in superconducting circuits: From arbitrary spin-spin interactions to the Kitaev honeycomb model

    Article • January 2019, American Physical Society (APS)

    Michael Hartmann

  12. Localization to delocalization crossover in a driven nonlinear cavity array

    Article • New Journal of Physics, April 2018, Institute of Physics Publishing

    Michael Hartmann

  13. Quantum correlations and limit cycles in the driven-dissipative Heisenberg lattice

    Article • New Journal of Physics, March 2018, Institute of Physics Publishing

    Michael Hartmann

  14. Dissipation-induced mobility and coherence in frustrated lattices

    Article • June 2017, American Physical Society (APS)

    Michael Hartmann

  15. Parametric Oscillation, Frequency Mixing, and Injection Locking of Strongly Coupled Nanomechanical Resonator Modes

    Article • Physical Review Letters, June 2017, American Physical Society (APS)

    Michael Hartmann

  16. Superconducting quantum simulator for topological order and the toric code

    Article • April 2017, American Physical Society (APS)

    Michael Hartmann

  17. Quantum simulation with interacting photons

    Article • Journal of Optics, September 2016, Institute of Physics Publishing

    Michael Hartmann

  18. Photonic currents in driven and dissipative resonator lattices

    Article • July 2016, American Physical Society (APS)

    Michael Hartmann

  19. Erratum: Theory of Frequency-Filtered and Time-ResolvedN-Photon Correlations [Phys. Rev. Lett.109, 183601 (2012)]

    Article • Physical Review Letters, June 2016, American Physical Society (APS)

    Michael Hartmann

  20. Dissipative Optomechanical Preparation of Macroscopic Quantum Superposition States

    Article • Physical Review Letters, June 2016, American Physical Society (APS)

    Michael Hartmann

  21. Degenerate optomechanical parametric oscillators: Cooling in the vicinity of a critical point

    Article • February 2016, American Physical Society (APS)

    Michael Hartmann

  22. Self-consistent projection operator theory in nonlinear quantum optical systems: A case study on degenerate optical parametric oscillators

    Article • Physical Review A, May 2015, American Physical Society (APS)

    Michael Hartmann

  23. Quantum State Engineering with Circuit Electromechanical Three-Body Interactions

    Article • Physical Review Letters, April 2015, American Physical Society (APS)

    Michael Hartmann

  24. Entangling the motion of two optically trapped objects via time-modulated driving fields

    Article • New Journal of Physics, January 2015, Institute of Physics Publishing

    Michael Hartmann

  25. Study of coupled QED-cavities using the self-consistent Mori projector method

    Article • Journal of Physics Conference Series, December 2014, Institute of Physics Publishing

    Michael Hartmann

  26. Spontaneous collective coherence in driven dissipative cavity arrays

    Article • Physical Review A, September 2014, American Physical Society (APS)

    Michael Hartmann

  27. Steady-state phase diagram of a driven QED-cavity array with cross-Kerr nonlinearities

    Article • Physical Review A, August 2014, American Physical Society (APS)

    Michael Hartmann

  28. Self-consistent projection operator theory for quantum many-body systems

    Article • Physical Review B, June 2014, American Physical Society (APS)

    Michael Hartmann

  29. Synchronized Switching in a Josephson Junction Crystal

    Article • Physical Review Letters, June 2014, American Physical Society (APS)

    Michael Hartmann

  30. Nonlinear nanomechanical resonators for quantum optoelectromechanics

    Article • Physical Review A, January 2014, American Physical Society (APS)

    Michael Hartmann

  31. The circuit quantum electrodynamical Josephson interferometer

    Article • EPJ Quantum Technology, January 2014, Springer Science + Business Media

    Michael Hartmann

  32. Photon correlations from ultrastrong optical nonlinearities

    Article • Physical Review A, December 2013, American Physical Society (APS)

    Michael Hartmann

  33. Correlator expansion approach to stationary states of weakly coupled cavity arrays

    Article • Journal of Physics B Atomic Molecular and Optical Physics, November 2013, Institute of Physics Publishing

    Michael Hartmann

  34. Single-Photon Transistor in Circuit Quantum Electrodynamics

    Article • Physical Review Letters, August 2013, American Physical Society (APS)

    Michael Hartmann

  35. Spontaneous Conversion from Virtual to Real Photons in the Ultrastrong-Coupling Regime

    Article • Physical Review Letters, June 2013, American Physical Society (APS)

    Michael Hartmann

  36. Photon Solid Phases in Driven Arrays of Nonlinearly Coupled Cavities

    Article • Physical Review Letters, April 2013, American Physical Society (APS)

    Michael Hartmann

  37. Nonclassical Radiation from Thermal Cavities in the Ultrastrong Coupling Regime

    Article • Physical Review Letters, April 2013, American Physical Society (APS)

    Michael Hartmann

  38. Two-photon spectra of quantum emitters

    Article • New Journal of Physics, March 2013, Institute of Physics Publishing

    Michael Hartmann

  39. Quantum Information Processing with Nanomechanical Qubits

    Article • Physical Review Letters, March 2013, American Physical Society (APS)

    Michael Hartmann

  40. Many body physics with coupled transmission line resonators

    Article • Physica Scripta, March 2013, Institute of Physics Publishing

    Michael Hartmann

  41. Thermal emission in the ultrastrong-coupling regime

    Article • Physica Scripta, March 2013, Institute of Physics Publishing

    Michael Hartmann

  42. Photon Blockade in the Ultrastrong Coupling Regime

    Article • Physical Review Letters, November 2012, American Physical Society (APS)

    Michael Hartmann

  43. Theory of Frequency-Filtered and Time-ResolvedN-Photon Correlations

    Article • Physical Review Letters, October 2012, American Physical Society (APS)

    Michael Hartmann

  44. Networks of nonlinear superconducting transmission line resonators

    Article • New Journal of Physics, July 2012, Institute of Physics Publishing

    Michael Hartmann

  45. Bose-Hubbard model with localized particle losses

    Article • Physical Review A, June 2012, American Physical Society (APS)

    Michael Hartmann

  46. Generation of Mesoscopic Entangled States in a Cavity Coupled to an Atomic Ensemble

    Article • Physical Review Letters, March 2012, American Physical Society (APS)

    Michael Hartmann

  47. Steady-state negative Wigner functions of nonlinear nanomechanical oscillators

    Article • New Journal of Physics, February 2012, Institute of Physics Publishing

    Michael Hartmann

  48. Signatures of single-site addressability in resonance fluorescence spectra

    Article • Physical Review A, January 2012, American Physical Society (APS)

    Michael Hartmann

  49. Arrays of waveguide-coupled optical cavities that interact strongly with atoms

    Article • New Journal of Physics, November 2011, Institute of Physics Publishing

    Michael Hartmann

  50. Dissipation-induced correlations in one-dimensional bosonic systems

    Article • New Journal of Physics, May 2011, Institute of Physics Publishing

    Michael Hartmann

  51. Bose–Hubbard dynamics of polaritons in a chain of circuit quantum electrodynamics cavities

    Article • New Journal of Physics, September 2010, Institute of Physics Publishing

    Michael Hartmann

  52. Master equation approach for interacting slow- and stationary-light polaritons

    Article • Physical Review A, September 2010, American Physical Society (APS)

    Michael Hartmann

  53. Polariton Crystallization in Driven Arrays of Lossy Nonlinear Resonators

    Article • Physical Review Letters, March 2010, American Physical Society (APS)

    Michael Hartmann

  54. Dissipation-induced Tonks-Girardeau gas of polaritons

    Article • Physical Review A, February 2010, American Physical Society (APS)

    Michael Hartmann

  55. Exact matrix product solutions in the Heisenberg picture of an open quantum spin chain

    Article • New Journal of Physics, February 2010, Institute of Physics Publishing

    Michael Hartmann

  56. Density Matrix Renormalization Group in the Heisenberg Picture

    Article • Physical Review Letters, February 2009, American Physical Society (APS)

    Michael Hartmann

  57. Quantum many-body phenomena in coupled cavity arrays

    Article • Laser & Photonics Review, December 2008, Wiley

    Michael Hartmann

  58. Steady State Entanglement in the Mechanical Vibrations of Two Dielectric Membranes

    Article • Physical Review Letters, November 2008, American Physical Society (APS)

    Michael Hartmann

  59. Light-shift-induced photonic nonlinearities

    Article • New Journal of Physics, April 2008, Institute of Physics Publishing

    Michael Hartmann

  60. A polaritonic two-component Bose–Hubbard model

    Article • New Journal of Physics, March 2008, Institute of Physics Publishing

    Michael Hartmann

  61. Migration of Bosonic Particles across a Mott Insulator to a Superfluid Phase Interface

    Article • Physical Review Letters, February 2008, American Physical Society (APS)

    Michael Hartmann

  62. Effective Spin Systems in Coupled Microcavities

    Article • Physical Review Letters, October 2007, American Physical Society (APS)

    Michael Hartmann

  63. Strong Photon Nonlinearities and Photonic Mott Insulators

    Article • Physical Review Letters, September 2007, American Physical Society (APS)

    Michael Hartmann

  64. Excitation and entanglement transfer near quantum critical points

    Article • Optics and Spectroscopy, July 2007, Pleiades Publishing Ltd

    Michael Hartmann

  65. Entanglement dynamics in chains of qubits with noise and disorder

    Article • New Journal of Physics, March 2007, Institute of Physics Publishing

    Michael Hartmann

  66. Geometric phases and critical phenomena in a chain of interacting spins

    Article • Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences, February 2007, Royal Society Publishing

    Michael Hartmann

  67. Strongly interacting polaritons in coupled arrays of cavities

    Article • Nature Nanotechnology, November 2006, Nature

    Michael Hartmann

  68. Excitation and entanglement transfer versus spectral gap

    Article • New Journal of Physics, June 2006, Institute of Physics Publishing

    Michael Hartmann

  69. Minimal length scales for the existence of local temperature

    Article • Contemporary Physics, March 2006, Taylor & Francis

    Michael Hartmann

  70. Nano-thermodynamics: On the minimal length scale for the existence of temperature

    Article • Physica E Low-dimensional Systems and Nanostructures, October 2005, Elsevier

    Michael Hartmann

  71. Global and local relaxation of a spin chain under exact Schrödinger and master-equation dynamics

    Article • Physical Review E, August 2005, American Physical Society (APS)

    Michael Hartmann

  72. Measurable consequences of the local breakdown of the concept of temperature

    Article • EPL (Europhysics Letters), June 2005, Institute of Physics Publishing

    Michael Hartmann

  73. Spectral Densities and Partition Functions of Modular Quantum ystems as Derived from a Central Limit Theorem

    Article • Journal of Statistical Physics, June 2005, Springer Science + Business Media

    Michael Hartmann

  74. Local versus global thermal states: Correlations and the existence of local temperatures

    Article • Physical Review E, December 2004, American Physical Society (APS)

    Michael Hartmann

  75. Existence of Temperature on the Nanoscale

    Article • Physical Review Letters, August 2004, American Physical Society (APS)

    Michael Hartmann

  76. Gaussian Quantum Fluctuations in Interacting Many Particle Systems

    Article • Letters in Mathematical Physics, May 2004, Springer Science + Business Media

    Michael Hartmann

  77. Scaling behavior of interactions in a modular quantum system and the existence of local temperature

    Article • EPL (Europhysics Letters), March 2004, Institute of Physics Publishing

    Michael Hartmann

  78. Fourier's Law confirmed for a class of small quantum systems

    Article • Zeitschrift für Physik B Condensed Matter, August 2003, Springer Science + Business Media

    Michael Hartmann