Current students

Chernoff Bound for Quantum Operations is Faithful

Nengkun Yu, Tsinghua University & University of Technology, Sydney

We consider the problem of testing two quantum hypotheses of quantum operations in the setting of many uses where an arbitrary prior distribution is given. The concept of the Chernoff bound for quantum operations is investigated to track the minimal average probability of error of discriminating two quantum operations asymptotically.

Joachim Nsofini of the Department of Physics and Astronomy is defending his thesis:

Quantum Information Enabled Neutron Interferometry

Joachim is supervised by IQC faculty member David Cory.

Mode-selection, purification, and ultrafast manipulation of quantum light with nonlinear waveguide devices

John Donohue, University of Paderborn

The temporal structure of quantum light offers an intrinsically high-dimensional and robust platform for encoding quantum information. In particular, the time-frequency degree of freedom can be explored in the frame of pulsed temporal modes, the ultrafast analogy to spatial Hermite-Gauss or orbital angular momentum modes. These overlapping temporal modes are naturally compatible with waveguide devices and fibre infrastructure, but present unique challenges to fully explore and exploit.

A platform to study many-body physics with photons

Hakan Tureci, Princeton University

The past decade has seen enormous experimental progress in building superconducting electrical circuits featuring artificial atoms subject to the quantized electromagnetic field of microwave photons. The fabrication and control of superconducting circuits has reached a stage where many such elements can be wired up into intricate networks, allowing the preparation and readout of complex quantum states of photons and atoms.

Join us at the Institute for Quantum Computing for a two-week introduction to the theoretical and experimental study of quantum information processing.

During the Undergraduate School on Experimental Quantum Information Processing (USEQIP) will be exposed to lectures and experiments on the following topics and more.

• Quantum information processing
• Implementation for quantum information processing
• Experimental exploration

The optimality of projections for quantum state exclusion

Abel Molina, IQC

We will first motivate the problem of quantum state exclusion of pure states, through its connections with the PBR game and with compatibility conditions for quantum state assignments. Then, we will discuss our recent result regarding the optimality of projections for perfect state exclusion of 3 pure states in 3 dimensions (arXiv:1702.06449).

Quantum simulation with laser-cooled trapped ions

Rajibul Islam, Institute for Quantum Computing

Laser-cooled trapped ions are among the most versatile experimental platforms for the simulation of non-trivial quantum Hamiltonians. What distinguishes this platform from others is the extent to which it is experimentally possible to control this system at the level of individual particles and interactions between them.

Quantum Technology: Theory Research at Strathclyde

John Jeffers, University of Strathclyde

I will provide a short overview of the UK national Quantum Technology Hubs and the theoretical involvement at Strathclyde in two Hubs: the Quantum Communications Hub and the Quantum Imaging Hub.