The Quantum Key Distribution (QKD) Summer School, hosted by IQC, equips graduate students and young postdoctoral fellows with a strong foundation in quantum communication, particularly quantum cryptography.
Thermodynamics has been highly successful, impacting strongly on the natural sciences and enabling the development of technologies that have changed our lives, from fridges to jet planes. Until recently, it was applied to large systems described by the laws of classical physics. However, with modern technologies miniaturizing down to the nanoscale and into the quantum regime, testing the applicability of thermodynamics in this new realm has become an exciting technological challenge.
Nonequilibrium quasiparticles and trapped magnetic flux vortices can significantly impact the performance of superconducting microwave resonant circuits and qubits at millikelvin temperatures. Quasiparticles result in excess loss, reducing resonator quality factors and qubit lifetimes. Vortices trapped near regions of large microwave currents also contribute excess loss. However, vortices located in current-free areascan actually trap quasiparticles and lead to a reduction in the quasiparticle loss.
We introduce an approach to homomorphic encryption on quantum data.
Homomorphic encryption is a cryptographic scheme that allows
evaluations to be performed on ciphertext without giving the evaluator
access to the secret encryption key. Random operations from an finite
abelian unitary group chosen using an encryption key chosen
uniformly at random perform the encryption, and operations that lie
within the centralizer of the encryption group perform the
Quantum-optical frequency conversion (QFC) provides a method, usually via a nonlinear interaction with an optical ‘pump’ beam, to keep the quantum features of an optical ‘signal’ intact. Most QFC experiments
upconvert near-infrared signal photons to those in the visible or near-visible regime due to the availability of highly-efficient detectors that can be operated at high speeds without incurring a severe noise penalty.
Jihyun Park of the Department of Physics and Astronomy will be defending his thesis:
Emulation of Anyonic Statistics using High-Fidelity NMR Quantum Information Processing (QIP) Techniques.
Jihyun is supervised by Professor Raymond Laflamme.
In recent years, Bayesian methods have been proposed as a solution to a wide range of issues in quantum state and process tomography. In this talk, we make these methods practical by solving three distinct problems: numerical intractability, a lack of informative prior distributions, and an inability to track time-dependent processes. Our approach allows for practical computation of point and region estimators for quantum states and channels, and allows tracking of time-dependent states.
Anirudh of the Department of Physics and Astronomy will be defending his thesis:
Experimentally Testable Noncontextuality Inequalities via Fourier-Motzkin Elimination.
Jihyun is supervised by Professors Joseph Emerson and Robert Spekkens.
The Institute for Quantum Computing (IQC) will open its doors to all members of the community as part of Reunion at the University of À¶Ý®ÊÓƵ. Bring the whole family to discover the excitement of quantum mechanics and learn about the world-class research that is happening right here in our community!
