Quantum computing

Multidisciplinary Research Program of the University Research Initiative (MURI)

  • By Aude Marjolin
  • 9 May 2016

The MURI program supports basic research in science and engineering at U.S. institutions of higher education that is of potential interest to DoD.

The program is focused on multidisciplinary research efforts where more than one traditional discipline interacts to provide rapid advances in scientific areas of interest to the DoD. By supporting multidisciplinary teams, the program is complementary to other DoD basic research programs that support university research through single-investigator awards.

APS Landauer and Bennett Award

  • By Aude Marjolin
  • 30 March 2016

The American Physical Society (APS) has established the Rolf Landauer and Charles H. Bennett Award in Quantum Computing to recognize recent, outstanding contributions in quantum information science by researchers in the field. The award particularly recognizes research involving quantum effects to perform computational and information-management tasks that would be impossible or infeasible by purely classical means.

Department of Physics and Astronomy, University of Pittsburgh
Ph.D., Physics, University of Illinois Urbana-Champaign, 2005

I am an experimentalist in the field of condensed matter physics. I study electrical properties of nanometre-size objects. As we find ways  to shrink one, two or all three dimensions of a solid, insights into how nature works on the scale of single electrons get uncovered. Along come prospects of smaller, faster and fundamentally different electronic devices. A spin computer or a quantum computer are examples. Nanofabrication makes it possible to attach electrodes to individual molecules or build artificial atoms. Novel materials such as graphene and semiconductor nanowires contribute previously unattainable properties to our toolbox. At TU Delft I investigate spin physics in nanowire quantum dots and superconductivity induced in semiconductors. In 2012 I move to the University of Pittsburgh, where I am now building a low temperature quantum transport laboratory.

Most Cited Publications
  1. "Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices," V. Mourik, K. Zuo, S. M. Frolov, S. R. Plissard, E. P. A. M. Bakkers, L. P. Kouwenhoven, Science 25, 1003 (2012)
  2. "New perspectives for Rashba spin–orbit coupling," A. Manchon, H. C. Koo, J. Nitta, S. M. Frolov & R. A. Duine, Nature Materials 14, 871 (2015)
  3. "Spin–orbit qubit in a semiconductor nanowire," S. Nadj-Perge, S. M. Frolov, E. P. A. M. Bakkers & L. P. Kouwenhoven, Nature 468, 1084 (2010)
  4. "Spectroscopy of Spin-Orbit Quantum Bits in Indium Antimonide Nanowires," S. Nadj-Perge, V. S. Pribiag, J. W. G. van den Berg, K. Zuo, S. R. Plissard, E. P. A. M. Bakkers, S. M. Frolov, and L. P. Kouwenhoven, Phys. Rev. Lett. 108, 166801 (2012)
  5. "Measurement of the current-phase relation of superconductor/ferromagnet/superconductor π Josephson junctions," S. M. Frolov, D. J. Van Harlingen, V. A. Oboznov, V. V. Bolginov, and V. V. Ryazanov, Phys. Rev. B 70, 144505 (2004)
Recent Publications
  1. Germanium Quantum-Well Josephson Field-Effect Transistors and Interferometers Vigneau, F., Mizokuchi, R., Zanuz, D.C., (...), Lefloch, F., De Franceschi, S. Nano Letters 19(2), pp. 1023-1027 (2019)
  2. Braiding quantum circuit based on the 4π Josephson effect Stenger, J.P.T., Hatridge, M., Frolov, S.M., Pekker, D. Physical Review B 99(3),035307 (2019)
  3. Second-Harmonic Current-Phase Relation in Josephson Junctions with Ferromagnetic Barriers Stoutimore, M.J.A., Rossolenko, A.N., Bolginov, V.V., (...), Ryazanov, V.V., Van Harlingen, D.J. Physical Review Letters 121(17),177702 (2018) 
  4. "Mirage Andreev Spectra Generated by Medoscopuc Leads in Nanowire Quntum Dots." Su, Z., Zarassi, A., Hsu, J.-F., (...), Bakkers, E.P.A.M., Frolov, S.M. Physical Review Letters (2018).
  5. "Control and detection of Majorana bound states in quantum dot arrays." Stenger, J.P.T., Woods, B.D., Frolov, S.M., Stanescu, T.D. Physical Review B 98(8), 085407 (2018).
Department of Physics and Astronomy, University of Pittsburgh
Ph.D., Physics, University of California Berkeley, 2012

I work in condensed matter theory, specializing in topological phases, quantum information, and classical simulation of quantum systems.

In contrast to Landau’s symmetry classification of matter, where phases are described by symmetry-breaking order parameters, topological phases are distinguished by nonlocal topological invariants.  These phases are fundamentally quantum mechanical with no classical analogue; they are characterized by exotic emergent excitations of the bulk, which are often accompanied by gapless edge degrees of freedoms.  My research is focused on finding materials which support these phases of matter, understanding their properties, and exploring ways that these systems can be manipulated.

Most Cited Publications
  1. "Antiferromagnetic topological insulators." Roger SK Mong, Andrew M Essin, Joel E Moore. Physical Review B.
  2. "Universal topological quantum computation from a superconductor-abelian quantum hall heterostructure." Roger SK Mong, David J Clarke, Jason Alicea, Netanel H Lindner, Paul Fendley, Chetan Nayak, Yuval Oreg, Ady Stern, Erez Berg, Kirill Shtengel, Matthew PA Fisher. Physical Review X.
  3. "In-plane transport and enhanced thermoelectric performance in thin films of the topological insulators Bi 2 Te 3 and Bi 2 Se 3." Pouyan Ghaemi, Roger SK Mong, Joel E Moore. Physical review letters.
  4. "Quantized response and topology of magnetic insulators with inversion symmetry." Ari M Turner, Yi Zhang, Roger SK Mong, Ashvin Vishwanath. Physical Review B.
  5. "Topological characterization of fractional quantum hall ground states from microscopic hamiltonians." Michael P Zaletel, Roger SK Mong, Frank Pollmann. Physical review letters.
Recent Publications
  1. "Homotopical classification of non-Hermitian band structures." Zhi Li, Roger SK Mong. arXiv preprint arXiv:1911.02697.
  2. "Emergent mode and bound states in single-component one-dimensional lattice fermionic systems." Yuchi He, Binbin Tian, David Pekker, Roger SK Mong. Physical Review B.
  3. "Finite-temperature topological entanglement entropy for CSS codes." Zhi Li, Roger SK Mong. arXiv preprint arXiv:1910.07545.
  4. "Pascal conductance series in ballistic one-dimensional LaAlO/SrTiO channels." Megan Briggeman, Michelle Tomczyk, Binbin Tian, Hyungwoo Lee, Jung-Woo Lee, Yuchi He, Anthony Tylan-Tyler, Mengchen Huang, Chang-Beom Eom, David Pekker, Roger SK Mong, Patrick Irvin, Jeremy Levy. arXiv preprint arXiv:1909.05698.
  5. "Entanglement renormalization for chiral topological phases." Zhi Li, Roger SK Mong. Physical Review B.
Department of Physics and Astronomy, University of Pittsburgh
Ph.D., University of California Berkeley, 2010

Quantum information is a rapidly growing theoretical and experimental field which seeks to harness the complexity and coherence of quantum bits to address challenges in computation and the simulation of complex quantum systems.  My research focuses on the use of superconducting microwave circuits as a quantum information platform.  In particular, we will focus on the use of microwave photons as quantum information carriers.  We will develop techniques to create, manipulate, and measure microwave light and use it to entangle larger quantum systems.

Efficient amplification of microwave signals is fundamental to this research, as it allows us to faithfully decode and record information contained in pulses of microwave light.  We will develop superconducting parametric amplifiers with the goal of achieving performance very close to the quantum limit, where the amplifier itself can perform unitary operations on its input fields.  This allows us to create new and complex measurement operations, which in turn will be used to entangle remote quantum bits and detect and remedy errors in quantum registers.

Selected Publications: 
  • "Josephson parametric converter saturation and higher order effects," G. Liu, T.-C. Chien, X. Cao, O. Lanes, E. Alpern, D. Pekker, and M. HatridgearXiv:1703.04425v1
  • "Quantum memory with millisecond coherence in circuit QED," Reagor, M., Pfaff, W., Axline, C., Heeres, R.W., Ofek, N., Sliwa, K., Holland, E., Wang, C., Blumoff, J., Chou, K., Hatridge, M.J., Frunzio, L., Devoret, M.H., Jiang, L., Schoelkopf, R.J., Phys Rev B 94, 014506 (2016)
  • "Theory of remote entanglement via quantum-limited phase-preserving amplification," Silveri, M., Zalys-Geller, E., Hatridge, M., Leghtas, Z., Devoret, M.H., Girvin, S.M.,
    Phys Rev A 93, 062310 (2016)
  • "Planar Multilayer Circuit Quantum Electrodynamics," Minev, Z.K., Serniak, K., Pop, I.M., Leghtas, Z., Sliwa, K., Hatridge, M., Frunzio, L., Schoelkopf, R.J., Devoret, M.H., Phys Rev Applied 5, 044021 (2016)
  • "Comparing and combining measurement-based and driven-dissipative entanglement stabilization," Liu, Y., Shankar, S., Ofek, N., Hatridge, M., Narla, A., Sliwa, K.M., Frunzio, L., Schoelkopf, R.J., Devoret, M.H., Phys Rev X, 6, 011022 (2016)
  • "Robust concurrent remote entanglement between two superconducting qubits," Narla, A., Shankar, S., Hatridge, M., Leghtas, Z., Sliwa, K.M., Zalys-Geller, E., Mundhada, S.O., Pfaff, W., Frunzio, L., Schoelkopf, R.J., Devoret, M.H., Phys Rev X, 6, 031036 (2016)
Most Cited Publications
  1. "Autonomously stabilized entanglement between two superconducting quantum bits," Shyam Shankar, Michael Hatridge, Zaki Leghtas, K. M. Sliwa, Aniruth Narla, Uri Vool, Steven M. Girvin, Luigi Frunzio, Mazyar Mirrahimi, Michel H. Devoret. Nature 504, no. 7480 (2013): 419.
  2. "Dispersive magnetometry with a quantoum limited SQUID parametric amplifier," Hatridge, M., Vijay, R., Slichter, D.H., Clarke, J., Siddiqi, I., Physical Review B - Condensed Matter and Materials Physics 83, no. 13 (2011)
  3.  "SQUID-detected magnetic resonance imaging in microtesla fields," John Clarke, Michael Hatridge, Michael Mößle.  Annu. Rev. Biomed. Eng. 9 (2007): 389-413.
  4. "Quantum back-action of an individual variable-strength measurement," Michael Hatridge, Shyam Shankar, Mazyar Mirrahimi, F. Schackert, K. Geerlings, T. Brecht, K. M. Sliwa, Science 339, no. 6116 (2013): 178-181.
  5. "Confining the state of light to a quantum manifold by engineered two-photon loss," Zaki Leghtas, Steven Touzard, Ioan M. Pop, Angela Kou, Brian Vlastakis, Andrei Petrenko, Katrina M. Sliwa.  Science 347, no. 6224 (2015): 853-857.
Recent Publications
  1. "Braiding Quantum Circuit Based on the 4Pi Josephson Effect." John P.T. Stenger, Michael Hatridge, Sergey M. Frolov, and David Pekker, Phys. Rev. B 99, 035307 (2019)
  2. "Simultaneous Monitoring of Fluxonium Qubits in a Eaveguide."     Kou, A., Smith, W.C., Vool, U., (...), Frunzio, L., Devoret, M.H. Physical Review Applied 9(6), 064022 (2018).
  3. "Braidonium: a braiding quantum circuit based on the 4π Josephson effect," John P. T. Stenger, Michael Hatridge, Sergey M. Frolov, David Pekker, arXiv:1808.03309v1
  4. "Josephson parametric converter saturation and higher order effects," G. Liu, T.-C. Chien, X. Cao, O. Lanes, E. Alpern, D. Pekker, and M. Hatridge, arXiv:1703.04425, (2017)
  5. "Robust concurrent remote entanglement between two superconducting qubits," Narla, S. Shankar, M. Hatridge, Z. Leghtas, K. M. Sliwa, E. Zalys-Geller, S. O. Mundhada, W. Pfaff, L. Frunzio, R. J. Schoelkopf, M. H. Devoret, arXiv:1603.03742 (2016)

Jeremy Levy Co-Edits October 2013 Issue of MRS Bulletin Dedicated to Quantum Computing

  • By Workstudy User
  • 2 December 2013

Materials Issues for Quantum Computation: The new field of quantum computing uses qubits (quantum bits) in place of classical bits to carry out certain types of computation. Physical systems that act as qubits encompass a wide range of technologies, from ions, to local defect states in crystals, and on to microelectronic devices addressable with wire interconnects. Materials issues arise in all of these, and this issue of MRS Bulletin describes how materials challenges and opportunities arise and have been used to make qubit-based quantum circuits using very different materials systems.

PQI Team Awarded Grant to Simulate Turbulent Combustion in Aerospace Applications

  • By Aude Marjolin
  • 18 April 2012

A research team at PQI is developing quantum-computing algorithms to better model turbulent combustion in aerospace applications. A five-year U.S. Air Force grant was awarded this month to principal investigator and PQI faculty Peyman Givi, Andrew Daley, and Jeremy Levy.

"If some of the things we are thinking do work and eventually we do achieve this, a process that could take weeks or months will transpire in minutes," said Givi. "It really is a quantum leap."