In the news

Quantum Engineering Research Paper on “Transparent Electrodes” One of Top 20 Downloads from the Journal Nano Letters

  • By Aude Marjolin
  • 8 May 2014

A journal article by PQI researchers investigating the properties of copper nanomeshes to form transparent electrodes was one of the Top 20 articles downloaded from the journal Nano Letters web site in April 2014. 

The team is led by principle investigator and PQI faculty Paul W. Leu, PhD, and Co-PIs include PQI faculty Jung-Kun Lee, PhD, and research assistants Bo Ding, Tongchuan Gao, and Baomin Wang. The article, "Uniform and Ordered Copper Nanomeshes by Microsphere Lithography for Transparent Electrodes," was published in Nano Letters.

Patrick D. Gallagher Named Chancellor-Elect of Pitt

  • By Workstudy User
  • 11 February 2014

Patrick Gallagher, Acting Deputy Secretary of the US Department of Commerce and Director of the National Institute of Standards and Technology (NIST) has been named the next Chancellor of the University of Pittsburgh. Gallagher, who received his Ph.D. in Physics at the University of Pittsburgh, will succeed Mark A. Nordenberg, who served as Chancellor for the last 19 years.

For more details, read the Pitt press release, and read here about the impact Gallagher had as Director of NIST.

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.

Semiconductor Nanocrosses Lay Foundations for Topological Quantum Bits

  • By Workstudy User
  • 17 October 2013

PQI faculty Sergey Frolov co-authors a paper in Nature Nanotechnology on the growth and characterization of high quality semiconductor nanocross structures. These structures are the building blocks for topological quantum bits based on recently discovered Majorana fermions.

These tests should make clear whether or not Majorana’s (and the nanowires that house them) are a suitable base for the so-called topological quantum computer.

Measuring Many-Body Entanglement

  • By Workstudy User
  • 4 September 2012

PQI faculty Andrew Daley and his colleagues have proposed a scheme for the measurement of entanglement in a system of cold atoms in an optical lattice. Entanglement is an important theoretical concept, but was previously thought to be difficult to measure in microscopic many-particle systems. They tackle the problem by asking how one might track the changes in entanglement in a nonequilibrium many-body system.

Their proposal involves an optical lattice created by lasers and filled with bosons: identical copies of a boson chain stored in the lattice are coupled as a potential barrier between them is reduced. After tunneling has occurred, a measurement of how the lattice wells are populated would give the entanglement entropy.

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