Quantum computing

Spring School on Quantum Computation

  • By Burcu Ozden
  • 24 January 2018

The 3.5-day Spring school will bring TCS researchers up to speed on the current excitement in quantum computing. The past decade had marked tremendous experimental progress, from one or two-qubit devices to dozens of qubits and more. What are the theoretical models for such devices, and what are their prospects? Can they be classically simulated, and if not, can they accomplish algorithmic speed-ups? What are the obstacles to full-blown fault-tolerant quantum computation? And what does all this tell us about complexity theory, cryptography, and quantum information?

International Conference on Quantum Communication, Measurement and Computing (QCMC)

  • By Leena Aggarwal
  • 8 January 2018

The International Conference on Quantum Communication, Measurement and Computing (QCMC) was established in 1990 to encourage and bring together scientists and engineers working in the interdisciplinary field of quantum information science and technology.

To date, thirteen such meetings have been held and the fourteenth is being organized by Quantum Science and Technologies Group (QST)Louisiana State University on March 12-16, 2018. QST group conducts research on atomic, molecular, and optical physics, the foundations of quantum mechanics, photonic band gap and meta materials, quantum information theory, quantum complexity theory, quantum error correction, quantum optics, optical quantum computing, quantum sensors, quantum imaging, and relativistic quantum information theory. It collaborates with a number of university and industrial research groups around the world, and we receive financial support for our research from a number of sources.

Quantum Computing Summer School Fellowship

  • By Burcu Ozden
  • 20 December 2017

The Quantum Computing Summer School is an immersive 10-week curriculum that includes tutorials from world-leading experts in quantum computation as well as one-on-one mentoring from Los Alamos National Laboratory (LANL) staff scientists who are conducting cutting-edge quantum computing research. Summer school fellowship recipients will be exposed to the theoretical foundations of quantum computation and will become skilled at programming commercial quantum computers, such as those developed by D-Wave Systems and IBM. Ten students will be awarded a fellowship from LANL that covers travel, living expenses in Los Alamos, and salary, with a fellowship value ranging from $7,500 to $13,000, based on academic rank (junior, senior, 1st year graduate student, etc.).

Sergey Frolov Among 2017 Young Investigator Award Recipients

  • By Aude Marjolin
  • 22 February 2017

The Office of Naval Research has announced awards of $16 million through its 2017 Young Investigator Program (YIP). The awards were made to 33 scientists whose research holds strong promise across several naval-relevant science and technology areas.

Sergey Frolov was among this year's Young Investigator Award recipients for his proposal "Semiconductor Nanowire-Based Quantum Emulators".

Applications of Adiabatic Quantum Computation in Mathematical Optimization

Pooya Ronagh
Friday, October 28, 2016 - 1:30pm to 3:00pm

Adiabatic quantum computation (AQC) is one of the paradigms of quantum computation that has recently gained great attention by advancements in manufacturing superconducting qubits. In this talk, I will overview the advantages and limitations of quantum annealers and methods of simulation of the behavior of futuristic devices. I will then discuss applicability of AQC in solving integer programming problems using a branch and bound framework implemented on a hybrid of a digital and a quantum processor.

Quantum Information Processing with 4 Electrons and 10^6 Nuclei

John Nichol
Tuesday, November 15, 2016 - 1:00pm to 2:00pm

Individual spins in semiconductors can retain their quantum phase coherence for times exceeding one second. Such long coherence times makes spins a versatile platform for exploring quantum information processing and condensed matter physics. I will discuss recent work exploiting the joint spin-state of two electrons in a GaAs double quantum dot as a spin qubit. This qubit is highly sensitive to its local magnetic environment. We leverage this sensitivity to precisely measure the statistically fluctuating nuclear polarization in the semiconductor crystal....

Decoherence and Flux Noise in Fluxonium-based Qubits

Angela Kou
Thursday, October 13, 2016 - 4:00pm to 5:00pm

Superconducting qubits are created by connecting Josephson junctions, which are non-linear, non-dissipative elements,to simple electrical circuits. In this talk, I will give a brief introduction to the fluxonium qubit, which is a Josephson junction connected to a superinductance. I will then introduce an artificial molecule, composed of two strongly coupled fluxonium atoms, which possesses a tunable magnetic moment. Using an applied external flux,we can tune the molecule between two regimes: one in which the ground-excited state manifold has a magnetic dipole...

Quantum Physicist Professor Rainer Blatt on the Second Quantum Revolution

  • By Aude Marjolin
  • 1 July 2016

Is quantum technology the future of the 21st century?

On the occasion of the 66th Lindau Nobel Laureate Meeting, this is the key question to be explored today in a panel discussion with the Nobel Laureates Serge Haroche, Gerardus 't Hooft, William Phillips, and David Wineland. In the following interview, Professor Rainer Blatt, internationally renowned quantum physicist, recipient of numerous honours, Council Member and Scientific Co-Chairman of the 66th Lindau Meeting, talks about what we can expect from the "second quantum revolution".

Inaugural Lecture Peyman Givi (University of Pittsburgh): Exascale HPC, Big Data, and Quantum Computing in Rocket Science

Exascale HPC, Big Data, and Quantum Computing in Rocket Science

Peyman Givi, PhD
Distinguished Professor of Mechanical Engineering and Materials Science
Swanson School Of Engineering
University of Pittsburgh

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. "In-Plane Transport and Enhanced Thermoelectric Performance in Thin Films of the Topological Insulators Bi2Te3 and Bi2Se3," Pouyan Ghaemi, Roger S. K. Mong, and J. E. Moore, Phys. Rev. Lett. 105, 166603 (2010)
  2. "Antiferromagnetic topological insulators," Roger S. K. Mong, Andrew M. Essin, and Joel E. Moore, Phys. Rev. B 81, 245209 (2010)
  3. "Universal Topological Quantum Computation from a Superconductor-Abelian Quantum Hall Heterostructure," Roger S. K. Mong, David J. Clarke, Jason Alicea, Netanel H. Lindner, Paul Fendley, Chetan Nayak, Yuval Oreg, Ady Stern, Erez Berg, Kirill Shtengel, and Matthew P. A. Fisher, Phys. Rev. X 4, 011036 (2014)
  4. "Quantized response and topology of magnetic insulators with inversion symmetry," Ari M. Turner, Yi Zhang, Roger S. K. Mong, and Ashvin Vishwanath, Phys. Rev. B 85, 165120 (2012)
  5. "Topological Characterization of Fractional Quantum Hall Ground States from Microscopic Hamiltonians," Michael P. Zaletel, Roger S. K. Mong, and Frank Pollmann, Phys. Rev. Lett. 110, 236801 (2013)
Recent Publications
  1. "Imaging anyons with scanning tunneling microscopy," Zlatko Papi´c, Roger S. K. Mong, Ali Yazdani, and Michael P. Zaletel,  Phys. Rev. X (2017)
  2. "Quantum dynamics of thermalizing systems," Christopher David White, Michael Zaletel, Roger S. K. Mong, and Gil Refael, arXiv:1707.01506v1
  3. "Emergent particle-hole symmetry in spinful bosonic quantum Hall systems," Scott D. Geraedts, Cecile Repellin, Chong Wang, Roger S. K. Mong, T. Senthil, Nicolas Regnault, arXiv:1704.01594
  4. "Fibonacci anyons and charge density order in the 12/5 and 13/5 quantum Hall plateaus," Roger S. K. Mong, Michael P. Zaletel, Frank Pollmann, and Zlatko Papić, Phys. Rev. B 95, 115136 (2017)
  5. "Entanglement renormalization for chiral topological phases," Zhi Li, Roger S. K. MongarXiv:1703.00464