blake johnson

Having recently completed my PhD in physics at Yale University, I have taken a new position at Raytheon BBN Technologies in Cambridge, MA. My research continues on superconducting implementations of quantum bits (qubits). The hope is to one day be able to build a practical quantum computer. You can find more information on my old lab website.

My hobbies include choral music, skiiing, tennis, web development/design, video games, and photography.

Publications:

• PhD thesis
• Coherence in a transmon qubit with epitaxial tunnel junctions
  Martin P. Weides, Jeffrey S. Kline, Michael R. Vissers, Martin O. Sandberg, David S. Wisbey, B. R. Johnson, Thomas A. Ohki, David P. Pappas. Accepted in APL, to appear in 2012 (cond-mat/111.5083)
• Observation of High Coherence in Josephson Junction Qubits Measured in a Three-Dimensional Circuit QED Architecture
  Hanhee Paik, D. I. Schuster, Lev S. Bishop, G. Kirchmair, G. Catelani, A. P. Sears, B. R. Johnson, M. J. Reagor, L. Frunzio, L. I. Glazman, S.M. Girvin, M. H. Devoret, R. J. Schoelkopf. Phys. Rev. Lett. 107, 240501 (December 2011). (cond-mat/1105.4652)
• Simple All-Microwave Entangling Gate for Fixed-Frequency Superconducting Qubits
  Jerry M. Chow, A. D. Córcoles, Jay M. Gambetta, Chad Rigetti, B. R. Johnson, John A. Smolin, J. R. Rozen, George A. Keefe, Mary B. Rothwell, Mark B. Ketchen, and M. Steffen. Phys. Rev. Lett. 107, 080502 (August 2011). doi: 10.1103/PhysRevLett.107.080502 (cond-mat/1106.0553)
• High-Fidelity Readout in Circuit Quantum Electrodynamics Using the Jaynes-Cummings Nonlinearity
  M. D. Reed, L. DiCarlo, B. R. Johnson, L. Sun, D. I. Schuster, L. Frunzio, and R. J. Schoelkopf. Phys. Rev. Lett. 105, 173601 (October 2010). doi: 10.1103/PhysRevLett.105.173601 (cond-mat/1004.4323)
• Preparation and measurement of three-qubit entanglement in a superconducting circuit
  L. DiCarlo, M. D. Reed, L. Sun, B. R. Johnson, J. M. Chow, J. M. Gambetta, L. Frunzio, S. M. Girvin, M. H. Devoret & R. J. Schoelkopf. Nature 467, 574–578 (September 2010). doi:10.1038/nature09416 (cond-mat/1004.4324)
• Quantum Non-demolition Detection of Single Microwave Photons in a Circuit
  B. R. Johnson, M. D. Reed, A. A. Houck, D. I. Schuster, Lev S Bishop, E. Ginossar, J. M. Gambetta, L. DiCarlo, L. Frunzio, S. M. Girvin, R. J. Schoelkopf. Nature Physics 9, 663-667 (June 2010). doi:10.1038/nphys1710 (cond-mat/1003.2734)
• Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
  M. D. Reed, B. R. Johnson, A. A. Houck, L. DiCarlo, J. M. Chow, D. I. Schuster, L. Frunzio, R. J. Schoelkopf. Applied Physics Letters 96, 203110 (21 May 2010). (cond-mat/1003.0142)
• Demonstration of two-qubit algorithms with a superconducting quantum processor
  L. DiCarlo, J. M. Chow, J. M. Gambetta, Lev S. Bishop, B. R. Johnson, D. I. Schuster, J. Majer, A. Blais, L. Frunzio, S. M. Girvin & R. J. Schoelkopf. Nature 460, 240 (9 July 2009). doi:10.1038/nature08121 (cond-mat/0903.2030)
• 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). doi:10.1103/PhysRevLett.102.090502 (cond-mat/0811.4387)
• 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, R. J. Schoelkopf. Phys. Rev. Lett. 101, 080502 (2008). doi:10.1103/PhysRevLett.101.080502 (cond-mat/0803.4490)
• 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, R. J. Schoelkopf. Phys. Rev. B 77, 180502(R) (2008), doi:10.1103/PhysRevB.77.180502 (cond-mat/0712.3581)
• 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 (London) 449, 443 (2007), doi:10.1038/nature06184 (cond-mat/0709.2135)
• Generating single microwave photons in a circuit
  A. A. Houck, D. I. Schuster, J. M. Gambetta, J. A. Schreier, B. R. Johnson, J. M. Chow, L. Frunzio, J. Majer, M. H. Devoret, S. M. Girvin and R. J. Schoelkopf. Nature (London) 449, 328 (2007), doi:10.1038/nature06126 (cond-mat/0702648)
• Resolving photon number states in a superconducting circuit.
  D. I. Schuster, A. A. Houck, J. A. Schreier, A. Wallraff1, J. M. Gambetta, A. Blais, L. Frunzio, J. Majer, B. R. Johnson, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf. Nature (London) 445, 515 (2007), doi:10.1038/nature05461 (cond-mat/0608693)