Publications

  1. Crosstalk-Robust Quantum Control in Multimode Bosonic Systems
    Xinyuan You, Yunwei Lu, Taeyoon Kim, Doga Murat Kurkcuoglu, Shaojiang Zhu, David van Zanten, Tanay Roy, Yao Lu, Srivatsan Chakram, Anna Grassellino, Alexander Romanenko, Jens Koch, Silvia Zorzetti
    arXiv:2403.00275 (2024)
  2. Tunable inductive coupler for high fidelity gates between fluxonium qubits
    Helin Zhang, Chunyang Ding, D. K. Weiss, Ziwen Huang, Yuwei Ma, Charles Guinn, Sara Sussman, Sai Pavan Chitta, Danyang Chen, Andrew A. Houck, Jens Koch, David I. Schuster
    arXiv:2309.05720 (2023)
  3. Systematic Improvements in Transmon Qubit Coherence Enabled by Niobium Surface Encapsulation
    Mustafa Bal, Akshay A. Murthy, Shaojiang Zhu, Francesco Crisa, Xinyuan You, Ziwen Huang, Tanay Roy, Jaeyel Lee, David van Zanten, Roman Pilipenko, Ivan Nekrashevich, Daniel Bafia, Yulia Krasnikova, Cameron J. Kopas, Ella O. Lachman, Duncan Miller, Josh Y. Mutus, Matthew J. Reagor, Hilal Cansizoglu, Jayss Marshall, David P. Pappas, Kim Vu, Kameshwar Yadavalli, Jin-Su Oh, Lin Zhou, Matthew J. Kramer, Dominic P. Goronzy, Carlos G. Torres-Castanedo, Graham Pritchard, Vinayak P. Dravid, James M. Rondinelli, Michael J. Bedzyk, Mark C. Hersam, John Zasadzinski, Jens Koch, James A. Sauls, Alexander Romanenko, Anna Grassellino
    arXiv:2304.13257 (2023)
  4. Optimal control of large quantum systems: assessing memory and runtime performance of GRAPE
    Yunwei Lu, Sandeep Joshi, Vinh San Dinh, Jens Koch
    J. Phys. Commun. 8 025002 (2024)
  5. Completely Positive Map for Noisy Driven Quantum Systems Derived by Keldysh Expansion
    Ziwen Huang, Yunwei Lu, Anna Grassellino, Alexander Romanenko, Jens Koch, and Shaojiang Zhu
    Quantum 7, 1158 (2023)
  6. Computer-aided quantization and numerical analysis of superconducting circuits
    Sai Pavan Chitta, Tianpu Zhao, Ziwen Huang, Ian Mondragon-Shem, Jens Koch
    New J. Phys. 24 103020 (2022)
  7. Time-Dependent Magnetic Flux in Devices for Circuit Quantum Electrodynamics
    Jacob Bryon, D. K. Weiss, Xinyuan You, Sara Sussman, Xanthe Croot, Ziwen Huang, Jens Koch, Andrew Houck
    Phys. Rev. Applied 19, 034031 (2023)
  8. Simple master equations for describing driven systems subject to classical non-Markovian noise
    Peter Groszkowski, Alireza Seif, Jens Koch, and Aashish A. Clerk
    Quantum 7, 972 (2023)
  9. Fast high-fidelity gates for galvanically-coupled fluxonium qubits via strong flux modulation
    Daniel K. Weiss, Helin Zhang, Chunyang Ding, Yuwei Ma, David I. Schuster, Jens Koch
    PRX Quantum 3.4, 040336 (2022)
  10. Robust Quantum Optimal Control with Trajectory Optimization
    Thomas Propson, Brian E. Jackson, Jens Koch,Zachary Manchester, David I. Schuster
    Phys. Rev. Applied 17, 014036 (2022)
  11. scqubits: a Python package for superconducting circuits
    Peter Groszkowski, Jens Koch
    Quantum 5, 583 (2021)
  12. Moving beyond the Transmon: Noise-Protected Superconducting Quantum Circuits
    András Gyenis, Agustin Di Paolo, Jens Koch, Alexandre Blais, Andrew A. Houck, David I. Schuster
    PRX Quantum 2, 030101 (2021)
  13. Variational tight-binding method for simulating large superconducting circuits
    Daniel K. Weiss, Wade DeGottardi, Jens Koch, David Ferguson
    Phys. Rev. Research 3, 033244 (2021)
  14. Positive- and negative-frequency noise from an ensemble of two-level fluctuators
    Xinyuan You, Aashish A. Clerk, Jens Koch
    Phys. Rev. Research 3, 013045 (2021)
  15. Engineering Dynamical Sweet Spots to Protect Qubits from 1/f Noise
    Ziwen Huang, Pranav S. Mundada, András Gyenis, David I. Schuster, Andrew A. Houck, Jens Koch
    Phys. Rev. Appl. 15, 034065 (2021)
  16. Protecting a Bosonic Qubit with Autonomous Quantum Error Correction
    Jeffrey M. Gertler, Brian Baker, Juliang Li, Shruti Shirol, Jens Koch, Chen Wang
    Nature 590, 243 (2021)
  17. Universal fast flux control of a coherent, low-frequency qubit
    Helin Zhang, Srivatsan Chakram, Tanay Roy, Nathan Earnest, Yao Lu, Ziwen Huang, Daniel K. Weiss, Jens Koch, David I. Schuster
    Phys. Rev. X 11, 011010 (2021)
  18. Experimental realization of an intrinsically error-protected superconducting qubit
    Andras Gyenis, Pranav S. Mundada, Agustin Di Paolo, Thomas M. Hazard, Xinyuan You, David I. Schuster, Jens Koch, Alexandre Blais, Andrew A. Houck
    Phys. Rev. X Quantum 2, 010339 (2021)
  19. Floquet-engineered enhancement of coherence times in a driven fluxonium qubit
    Pranav S. Mundada, András Gyenis, Ziwen Huang, Jens Koch, Andrew A. Houck
    Phys. Rev. Appl. 14, 054033 (2020)
  20. Low-frequency dispersion of phonons in one-dimensional chains
    Benjamin T. Moy, Jens Koch, Anupam Garg
    Eur. J. Phys. 41, 035801 (2020)
  21. Universal gates for protected superconducting qubits using optimal control
    Mohamed Abdelhafez, Brian Baker, Andras Gyenis, Pranav Mundada, Andrew A. Houck, David Schuster, Jens Koch
    Phys. Rev. A 101, 022321 (2020)
  22. Quantum control of an oscillator using a stimulated Josephson nonlinearity
    Andrei Vrajitoarea, Ziwen Huang, Peter Groszkowski, Jens Koch & Andrew A. Houck
    Nat. Phys. 16, 211-217 (2020)
  23. Spectrum and Coherence Properties of the Current-Mirror Qubit
    Daniel K. Weiss, Andy C. Y. Li, D. G. Ferguson, Jens Koch
    Phys. Rev. B 100, 224507 (2019)
  24. Circuit quantization in the presence of time-dependent external flux
    Xinyuan You, J. A. Sauls, Jens Koch
    Phys. Rev. B 99, 174512 (2019)
  25. Gradient-based optimal control of open quantum systems using quantum trajectories and automatic differentiation
    Mohamed Abdelhafez, David I. Schuster, and Jens Koch
    Phys. Rev. A 99, 052327 (2019)
  26. Control and coherence time enhancement of the 0–π qubit
    Agustin Di Paolo, Arne L Grimsmo, Peter Groszkowski, Jens Koch, and Alexandre Blais
    New J. Phys. 21 043002 (2019)
  27. Adaptive Rotating-Wave Approximation for Driven Open Quantum Systems
    Brian Baker, Andy C. Y. Li, Nicholas Irons, Nathan Earnest, and Jens Koch
    Phys. Rev. A 98, 052111 (2018)
  28. Universal stabilization of single-qubit states using a tunable coupler
    Ziwen Huang, Yao Lu, Eliot Kapit, David I. Schuster, and Jens Koch
    Phys. Rev. A 97, 062345 (2018)
  29. Coherence properties of the 0-π qubit
    Peter Groszkowski, A. Di Paolo, A. L. Grimsmo, A. Blais, D. I. Schuster, A. A. Houck, and Jens Koch
    New J. Phys. 20, 043053 (2018)
  30. Realization of a Λ system with metastable states of a capacitively-shunted fluxonium
    N. Earnest, S. Chakram, Y. Lu, N. Irons, R. K. Naik, N. Leung, L. Ocola, D. A. Czaplewski, B. Baker, Jay Lawrence, Jens Koch, and D. I. Schuster
    Phys. Rev. Lett. 120, 150504 (2018)
  31. Fibonacci Quasicrystals of Transmission-Line Resonators
    Benjamin T. Moy
    Senior Honors Thesis (2018)
  32. Random access quantum information processors using multimode circuit quantum electrodynamics
    R. K. Naik, N. Leung, S. Chakram, Peter Groszkowski, Y. Lu, N. Earnest, D. C. McKay, Jens Koch, and D. I. Schuster
    Nat. Commun. 8, 1904 (2017)
  33. Mapping repulsive to attractive interaction in driven–dissipative quantum systems
    Andy C. Y. Li and Jens Koch
    New J. Phys. 19, 115010 (2017)
  34. Universal Stabilization of a Parametrically Coupled Qubit
    Yao Lu, S. Chakram, N. Leung, N. Earnest, R. K. Naik, Ziwen Huang, Peter Groszkowski, Eliot Kapit, Jens Koch, and David I. Schuster
    Phys. Rev. Lett. 119, 150502 (2017)
  35. Speedup for quantum optimal control from automatic differentiation based on graphics processing units
    Nelson Leung, Mohamed Abdelhafez, Jens Koch, and David Schuster
    Phys. Rev. A 95, 042318 (2017)
  36. Observation of a dissipative phase transition in a one-dimensional circuit QED lattice
    Mattias Fitzpatrick, Neereja M. Sundaresan, Andy C. Y. Li, Jens Koch and A. A. Houck
    Phys. Rev. X 7, 011016 (2017)
  37. Imaging Photon Lattice States by Scanning Defect Microscopy
    D. L. Underwood, W. E. Shanks, Andy C. Y. Li, Lamia Ateshian, Jens Koch and A. A. Houck
    Phys. Rev. X 6, 021044 (2016)
  38. Resummation for Nonequilibrium Perturbation Theory and Application to Open Quantum Lattices
    Andy C. Y. Li, F. Petruccione and Jens Koch
    Phys. Rev. X 6, 021037 (2016)
  39. Nematic quantum liquid crystals of bosons in frustrated latticessdm
    Guanyu Zhu, Jens Koch and Ivar Martin
    Phys. Rev. B 93, 144508 (2016)
  40. Understanding degenerate ground states of a protected quantum circuit in the presence of disorder
    Joshua Dempster, Bo Fu, David G. Ferguson, D. I. Schuster, and Jens Koch
    Phys. Rev. B 90, 094518 (2014)
  41. Perturbative approach to Markovian open quantum systems
    Andy C. Y. Li, F. Petruccione and Jens KochPT-fig
    Sci. Rep. 4, 4887 (2014)
  42. Fifty years of Jaynes–Cummings physics
    Andrew D. Greentree, Jens Koch and Jonas Larson
    J. Phys. B: At. Mol. Opt. Phys. 46 220201 (2013)
  43. Dispersive regime of the Jaynes–Cummings and Rabi lattice
    Guanyu Zhu, Sebastian Schmidt and Jens Koch
    New J. Phys. 15 115002 (2013)
  44. Asymptotic expressions for charge-matrix elements of the fluxonium circuit
    Guanyu Zhu and Jens Koch
    Phys. Rev. B 87, 144518 (2013)
  45. Circuit QED lattices: towards quantum simulation with superconducting circuits
    Sebastian Schmidt and Jens Koch
    Ann. Phys. (Berlin) 525,  395–412 (2013)
  46. Circuit QED with fluxonium qubits: theory of the dispersive regime
    Guanyu Zhu, David G. Ferguson, Vladmir E. Manucharyan, and Jens Koch
    Phys. Rev. B 87, 024510 (2013)
  47. Symmetries and collective excitations in large superconducting circuitssym
    David G. Ferguson, A. A. Houck, and Jens Koch
    Phys. Rev. X 3, 011003 (2013)
  48. Low-disorder microwave cavity lattices for quantum simulation with photons
    D. L. Underwood, W. E. Shanks, Jens Koch, and A. A. Houck
    Phys. Rev. A 86, 023837 (2012)
  49. On-chip quantum simulation with superconducting circuits
    A. A. Houck, H. E. Türeci, and Jens Koch
    Nature Phys. 8, 292–299 (2012)
  50. Evidence for coherent quantum phase-slips across a Josephson junction array
    V. E. Manucharyan, N. A. Masluk, A. Kamal, Jens Koch, L. I. Glazman, and M. H. Devoret
    Phys. Rev. B 85, 024521 (2012)
  51. Synthetic gauge fields and homodyne transmission in Jaynes-Cummings lattices
    A. Nunnenkamp, Jens Koch, and S. M. Girvin
    New J. Phys. 13, 095008 (2011)
  52. Effective equilibrium theory of nonequilibrium quantum transport
    P. Dutt, Jens Koch, J. Han, and K. Le Hur
    Ann. Phys. 326, 2963 (2011)
  53. Quasiparticle relaxation of superconducting qubits in the presence of flux
    G. Catelani, Jens Koch, L. Frunzio, R. J. Schoelkopf, M. H. Devoret, and L. I. Glazman
    Phys. Rev. Lett. 106, 077002 (2011)
  54. Time-reversal symmetry breaking in circuit-QED based photon latticestrev
    Jens Koch, A. A. Houck, K. Le Hur, and S. M. Girvin
    Phys. Rev. A 82, 043811 (2010)
  55. Charging effects in the inductively shunted Josephson junction
    Jens Koch, V. Manucharyan, M. H. Devoret, and L. I. Glazman
    Phys. Rev. Lett. 103, 217004 (2009)
  56. Coherent oscillations between classically separable quantum states of a superconducting loop
    V. Manucharyan, J. Koch, M. Brink, L. I. Glazman, and M. H. Devoret
    arXiv:0910.3039 (2009)
  57. Superfluid-Mott Insulator Transition of Light in the Jaynes-Cummings Lattice
    J. Koch and K. Le Hur
    Phys. Rev. A 80, 023811(2009)
  58. Fluxonium: Single Cooper-Pair Circuit Free of Charge Offsets
    V. Manucharyan, J. Koch, L. I. Glazman, M. H. Devoret
    Science 326, 113 (2009)
  59. Proposal for generating and detecting multi-qubit GHZ states in circuit QED
    L. S. Bishop,  L. Tornberg, D. Price, E. Ginossar, A.  Nunnenkamp, A. A. Houck, J. M. Gambetta, J. Koch, G. Johansson, S. M. Girvin, and R. J. Schoelkopf
    New J. Phys. 11, 073040(2009)
  60. Life after charge noise: recent results with transmon qubits
    A. A. Houck, Jens Koch, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf
    Quant. Inf. Proc. 8, 105 (2009) .
  61. Randomized benchmarking and process tomography for gate errors in a solid-state qubit
    J. M. Chow, J. M. Gambetta, L. Tornberg, Jens Koch, Lev S. Bishop, A. A. Houck, B. R. Johnson, L. Frunzio, S. M. Girvin, and R. J. Schoelkopf
    Phys. Rev. Lett. 102, 090502 (2009)
  62. Nonlinear response of the vacuum Rabi resonancebishop
    Lev S. Bishop, J. M. Chow, Jens Koch, A. A. Houck, M. H. Devoret, E. Thuneberg, S. M. Girvin, and R. J. Schoelkopf
    Nature Physics 5, 105 (2009)
  63. Controlling the spontaneous emission of a superconducting transmon qubit
    A. A. Houck, J. A. Schreier, B. R. Johnson, J. M. Chow, Jens Koch, J. M. Gambetta, D. I. Schuster, L. Frunzio, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf
    Phys. Rev. Lett. 101, 080502 (2008)
  64. Discontinuous current-phase relations in small 1D Josephson junction arrays
    Jens Koch, Karyn Le Hur
    Phys. Rev. Lett. 101, 097007 (2008)
  65. Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
    J. A. Schreier, A. A. Houck, Jens Koch, D. I. Schuster, B. R. Johnson, J. M. Chow, J. M. Gambetta, J. Majer, L. Frunzio, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf
    Phys. Rev. B 77, 180502(R) (2008)
  66. Coupling Superconducting Qubits via a Cavity Bus
    J. Majer, J. M. Chow, J. M. Gambetta, Jens Koch, B. R. Johnson, J. A. Schreier, L. Frunzio, D. I. Schuster, A. A. Houck, A. Wallraff, A. Blais, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf
    Nature 449, 443 (2007)
  67. Vibrational absorption sidebands in the Coulomb blockade regime
    Matthias C. Lueffe, Jens Koch, Felix von Oppen
    Phys. Rev. B 77, 125306 (2008)
  68. Charge insensitive qubit design derived from the Cooper pair boxtransmon
    Jens Koch, Terri M. Yu, Jay Gambetta, A. A. Houck, D. I. Schuster, J. Majer, Alexandre Blais, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf
    Phys. Rev. A 76, 042319 (2007)
  69. Nonequilibrium charge-Kondo transport through negative-U molecules
    Jens Koch, Eran Sela, Yuval Oreg, Felix von Oppen
    Phys. Rev. B 75, 195402 (2007)
  70. Theory of the Franck-Condon blockade regime
    Jens Koch, Felix von Oppen, A. V. Andreev
    Phys. Rev. B 74, 205438 (2006)
  71. Fractional Shot Noise in the Kondo Regime
    Eran Sela, Yuval Oreg, Felix von Oppen, and Jens Koch
    Phys. Rev. Lett. 97, 086601 (2006)
  72. Novel quantum transport effects in single-molecule transistors
    Felix von Oppen, Jens Koch
    Advances in Solid State Physics 46 (Springer-Verlag Berlin, 2006)
  73. Pair tunneling through single molecules
    Jens Koch, M.E. Raikh, and Felix von Oppen
    Phys. Rev. Lett. 96, 056803 (2006)
  74. Current-induced nonequilibrium vibrations in single-molecule devices
    Jens Koch, Matthias Semmelhack, Felix von Oppen, and Abraham Nitzan
    Phys. Rev. B 73, 155306 (2006)
  75. Effects of charge-dependent vibrational frequencies and anharmonicities in transport through molecules
    Jens Koch, Felix von Oppen
    Phys. Rev. B 72, 113308 (2005)
  76. Full counting statistics of strongly non-Ohmic transport through single moleculesfc
    Jens Koch, M.E. Raikh, and Felix von Oppen
    Phys. Rev. Lett. 95, 056801 (2005)
  77. Franck-Condon Blockade and Giant Fano Factors in Transport Through Single Molecules
    Jens Koch, Felix von Oppen
    Phys. Rev. Lett. 94, 206804 (2005)
  78. Thermopower of Single-Molecule Devices
    Jens Koch, Felix von Oppen, Yuval Oreg, and Eran Sela
    Phys. Rev. B 70, 195107 (2004)