Events

Yaoyun Shi, University of Michigan

How can one be certain that the output of an alleged random
number generator is indeed random? This question is important not
only for the efficiency and the security of information
processing, but also for understanding how intrinsically
unpredictable events are possible in Nature. Practical random
number generators have often been found to be insecure. All
existing theoretical solutions require a certain form of
independence among two or more sources of randomness, a condition

Martin Roetteler,  NEC Laboratories America

Recently, quantum circuits that are composed of unitary as well as probabilistic elements were employed for quantum synthesis and compilation tasks. In some cases, RUS designs led to implementations that on average are more efficient than the previously best known solutions based on unitary circuit designs. I will highlight some of the developments that are related to the synthesis of single-qubit operations and to the implementation of integer arithmetic on a quantum computer.

Ramy El Ganainy, Michigan Technological University

Robin Kothari

I will talk about a classic lemma due to Jordan (1875) that is
frequently used in quantum computing.  Jordan's lemma says that given
any two orthogonal projectors, there is a way to partition the
underlying vector space into 1- and 2-dimensional subspaces that are
invariant under the action of both projectors.  This simple lemma has
applications in several areas of quantum computing.  In this talk will
discuss the lemma, its proof, and explain some selected applications in

Dominique Unruh, University of Tartu

Position verification allows us to verify the position of a device in space (e.g., for enabling access to location based services). Unfortunately, position verification is known to be insecure in principle using only classical cryptography. We show how position verification can be achieved using quantum communication.

Karol Zyczkowski, Jagellonian University

A pure quantum state of N subsystems with d levels each is called
k-uniform, if all its reductions to k qudits are maximally mixed.
These states form a natural generalization of N-qudits GHZ states
which belong to the class 1-uniform states.

Sergey Bravyi, IBM Research

Stoquastic Hamiltonians are characterized by the property that their off-diagonal matrix elements in the standard product basis are real and non-positive. Many interesting quantum models fall into this class including the Transverse field Ising Model (TIM), the Heisenberg model on bipartite graphs, and the bosonic Hubbard model.

Alexander Szameit, Friedrich-Schiller-Universität Jena

I report about our recent achievements on integrated photonic quantum circuits. For the fabrication we use direct laser-inscription, which allows complex three-dimensional waveguide architectures on chip for using multiple degrees of freedom, in particular diffraction control and birefringence.

Genda Gu, Brookhaven National Laboratory

Gregor Weihs, Institut für Experimentalphysik, Universität Innsbruck

For fundamental tests of quantum physics as well as for quantum communications non-classical states of light are an important tool. In our research we focus on developing semiconductor-based and integrated sources of single photons and entangled photon pairs.