Journal Club Archive 2017

Wednesday, December 13th 2017
Shusen Liu, Xin Wang, Li Zhou, Ji Guan, Yinan Li, Yang He, Runyao Duan, and Mingsheng Ying
Q∣SI⟩: A Quantum Programming Environment,
Discussion leader: Xiang

Wednesday, December 6th 2017
Casparis et al.
Superconducting Gatemon Qubit based on a Proximitized Two-Dimensional Electron Gas,
Discussion leader: Leo

Wednesday, November 22nd 2017
S. Kono , K. Koshino , Y. Tabuchi , A. Noguchi , and Y. Nakamura
Quantum non-demolition detection of an itinerant microwave photon,
Discussion leader: Christian

Wednesday, November 15th 2017
Moll et al.
Quantum optimization using variational algorithms on near-term quantum devices
Discussion leader: Adriaan

Wednesday, November 1st 2017
Anton Potočnik et al.
Studying Light-Harvesting Models with Superconducting Circuits,
Wednesday, October 25th 2017
Nathan Earnest, Srivatsan Chakram, Yao Lu, Nicholas Irons, Ravi K. Naik, Nelson Leung, Jay Lawrence, Jens Koch, David I. Schuster
Realization of a Λ system with metastable states of a capacitively-shunted fluxonium,
Discussion leader: Thijs

Wednesday, October 18th 2017
P. Roushan et al.
Spectral signatures of many-body localization with interacting photons
Discussion leader: Nandini

Wednesday, October 11th 2017
G. Calusine, A. Melville, W. Woods, R. Das, C. Stull, V. Bolkhovsky, D. Braje, D. Hover, D.K. Kim, X. Miloshi, D. Rosenberg, A. Sevi, J.L. Yoder, E.A. Dauler, W.D. Oliver
Analysis and mitigation of interface losses in trenched superconducting coplanar waveguide resonators,
Discussion leader: Dave

Wednesday, October 4th 2017
Neill et al.
A blueprint for demonstrating quantum supremacy with superconducting qubits,
Discussion leader: Brian

Wednesday, September 27th 2017
Nicholas T. Bronn, Vivekananda P. Adiga, Salvatore B. Olivadese, Xian Wu, Jerry M. Chow, David P. Pappas
High Coherence Plane Breaking Packaging for Superconducting Qubits,
Discussion leader: Florian

Wednesday, September 20th 2017
Thorbeck, T., Zhu, S., Leonard Jr, E., Barends, R., Kelly, J., Martinis, J. M., & McDermott, R.
Reverse isolation and backaction of the SLUG microwave amplifier,
Discussion leader: Niels

Wednesday, September 13th 2017
Colless J.I., et al.
Robust determination of molecular spectra on a quantum processor,
Discussion leader: Malay

Wednesday, September 6th 2017
T Häner, DS Steiger, M Smelyanskiy, M Troyer
High performance emulation of quantum circuits,
Discussion leader: Xiang

Wednesday, August 23rd 2017
Foxen B.,  et al.
Qubit compatible superconducting interconnects,
Discussion leader: Alessandro

Wednesday, August 16th 2017
Andrew Eddins, Sydney Schreppler, David M. Toyli, Leigh S. Martin, Shay Hacohen-Gourgy, Luke C. G. Govia, Hugo Ribeiro, Aashish A. Clerk, Irfan Siddiqi.
Stroboscopic qubit measurement with squeezed illumination,
Discussion leader: Jaap

Wednesday, August 9th 2017
Samuel Boutin, David M. Toyli, Aditya V. Venkatramani, Andrew W. Eddins, Irfan Siddiqi and Alexandre Blais.
Effect of higher-order nonlinearities on amplification and squeezing in Josephson parametric amplifiers
Discussion leader: Leo D.C.

Wednesday, July 26th 2017
Hacohen-Gourgy, Shay, Luis Pedro García-Pintos, Leigh S. Martin, Justin Dressel, & Irfan Siddiqi.
Incoherent qubit control using the quantum Zeno effect, 
Discussion leader: Livio.

Wednesday, July 19th 2017
Reagor, M., et al.
Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice,
.. and..
Caldwell, S., et al. 
Parametrically-Activated Entangling Gates Using Transmon Qubits, 
Discussion leader: Ramiro.

Wednesday, July 12th 2017
Jerger, Markus, Zénon Vasseli, and Arkady Fedorov
In situ characterization of qubit control lines: A qubit as a vector network analyzer,
Discussion leader: Adriaan.

Wednesday, July 5th 2017
D. Rosenberg, D. Kim, R. Das, D. Yost, S. Gustavsson, D. Hover, P. Krantz, A. Melville, L. Racz, G. O. Samach, S. J. Weber, F. Yan, J. Yoder, A. J. Kerman, W. D. Oliver
3D integrated superconducting qubits,
Discussion leader: Stefano.

Wednesday, June 28th 2017
Yen-Hsiang Lin, Long B. Nguyen, Nicholas Grabon, Jonathan San Miguel, Natalya Pankratova, Vladimir E. Manucharyan
Protecting a superconducting qubit from energy decay by selection rule engineering,
Discussion leader: Oscar.

Wednesday, June 21st 2017
X. Wu, J. L. Long, H. S. Ku, R. E. Lake, M. Bal, D. P. Pappas
Overlap junctions for high coherence superconducting qubits ,
… and … 
A. Dunsworth, A. Megrant, C. Quintana, Zijun Chen, R. Barends, B. Burkett, B. Foxen, Yu Chen, B. Chiaro, A. Fowler, R. Graff, E. Jeffrey, J. Kelly, E. Lucero, J.Y. Mutus, M. Neeley, C. Neill, P. Roushan, D. Sank, A. Vainsencher, J. Wenner, T.C. White, John M. Martinis
Characterization and Reduction of Capacitive Loss Induced by Sub-Micron Josephson Junction Fabrication in Superconducting Qubits ,
Discussion leader: Dave.

Wednesday, June 14th 2017
David J. van Woerkom, Alex Proutski, Bernard van Heck, Daniël Bouman, Jukka I. Väyrynen, Leonid I. Glazman, Peter Krogstrup, Jesper Nygård, Leo P. Kouwenhoven & Attila Geresdi
Microwave spectroscopy of spinful Andreev bound states in ballistic semiconductor Josephson junctions,
Nature Physics, 2017.
Discussion leader: Florian.

Wednesday, June 7th 2017
Emmanuel Flurin, Vinay V. Ramasesh, Shay Hacohen-Gourgy, Leigh S. Martin, Norman Y. Yao, Irfan Siddiqi
Observing Topological Invariants Using Quantum Walk in Superconducting Circuits,
Discussion leader: Brian.

Wednesday, May 31st 2017
Maika Takita, Andrew W. Cross, A. D. Córcoles, Jerry M. Chow, Jay M. Gambetta
Experimental demonstration of fault-tolerant state preparation with superconducting qubits,
Discussion leader: Niels.

Wednesday, May 24th 2017
Abhinav Kandala, Antonio Mezzacapo, Kristan Temme, Maika Takita, Jerry M. Chow, Jay M. Gambetta
Hardware-efficient Quantum Optimizer for Small Molecules and Quantum Magnets,
Discussion leader: Malay.

Wednesday, May 17th 2017
Chao Song, Kai Xu, Wuxin Liu, Chuiping Yang, Shi-Biao Zheng, Hui Deng, Qiwei Xie, Keqiang Huang, Qiujiang Guo, Libo Zhang, Pengfei Zhang, Da Xu, Dongning Zheng, Xiaobo Zhu, H. Wang, Y.-A. Chen, C.-Y. Lu, Siyuan Han, J.-W. Pan
10-qubit entanglement and parallel logic operations with a superconducting circuit,
Discussion leader: Nathan.

Wednesday, May 10th 2017
Colm A. Ryan, Blake R. Johnson, Diego Ristè, Brian Donovan, Thomas A. Ohki
Hardware for Dynamic Quantum Computing,
Discussion leader: Xiang.

Wednesday, May 3rd 2017
M. D. Hutchings, Jared B. Hertzberg, Yebin Liu, Nicholas T. Bronn, George A. Keefe, Jerry M. Chow, B. L. T. Plourde
Tunable Superconducting Qubits with Flux-Independent Coherence,
Discussion leader: Ale.

Wednesday, April 19th 2017
Young-Wan Kim, Kang-Ho Lee, Kicheon Kang
Vacuum-fluctuation-induced Dephasing of a Qubit in Circuit Quantum Electrodynamics,
Discussion leader: Jaap.

Wednesday, April 12th 2017
Matthew T. Bell, Joshua Paramanandam, Lev B. Ioffe, and Michael E. Gershenson
Protected Josephson Rhombus Chains,
Phys. Rev. Lett. 112, 167001 (2014).
Discussion leader: Leo.

Thursday, April 6th 2017
J. Zhang, P. W. Hess, A. Kyprianidis, P. Becker, A. Lee, J. Smith, G. Pagano, I.-D. Potirniche, A. C. Potter, A. Vishwanath, N. Y. Yao, C. Monroe
Observation of a Discrete Time Crystal,
Discussion leader: Chris.

Wednesday, March 29th 2017
N. Cottet, S. Jezouin, L. Bretheau, P. Campagne-Ibarcq, Q. Ficheux, J. Anders, A. Auffèves, R. Azouit, P. Rouchon, and B. Huard
Observing a quantum Maxwell demon at work,
Discussion leader: Ramiro.

Wednesday, February 15th 2017
Steven J. Weber, Gabriel O. Samach, David Hover, Simon Gustavsson, David K. Kim, Danna Rosenberg, Adam P. Sears, Fei Yan, Jonilyn L. Yoder, William D. Oliver, Andrew J. Kerman
Coherent coupled qubits for quantum annealing,
Discussion leader: Marios.

Wednesday, February 8th 2017
Jochen Braumüller, Michael Marthaler, Andre Schneider, Alexander Stehli, Hannes Rotzinger, Martin Weides, Alexey V. Ustinov
Analog quantum simulation of the Rabi model in the ultra-strong coupling regime,
Discussion leader: Nathan.

Wednesday, February 1st 2017
T. Walter, P. Kurpiers, S. Gasparinetti, P. Magnard, A. Potocnik, Y. Salathe, M. Pechal, M. Mondal, M. Oppliger, C. Eichler, A. Wallraff
Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits,
Discussion leader: Stefano.

Wednesday, January 25th 2017
U. Patel, Ivan V. Pechenezhskiy, B. L. T. Plourde, M. G. Vavilov, R. McDermott
Phonon-Mediated Quasiparticle Poisoning of Superconducting Microwave Resonators,
Discussion leader: Dave.

Wednesday, January 11th 2017
Simon Gustavsson, Fei Yan, Gianluigi Catelani, Jonas Bylander, Archana Kamal, Jeffrey Birenbaum, David Hover, Danna Rosenberg, Gabriel Samach, Adam P. Sears, Steven J. Weber, Jonilyn L. Yoder, John Clarke, Andrew J. Kerman, Fumiki Yoshihara, Yasunobu Nakamura, Terry P. Orlando, William D. Oliver
Suppressing relaxation in superconducting qubits by quasiparticle pumping,
Discussion leader: Florian.