Current graduate students
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.
Dephasing with strings attached
Leonid Pryadko, University of California, Riverside
Is there a difference between the quantum dynamics of a "real" particle and a collective excitation, like that in a spin ice, which creates a measurable gauge field? I will argue that in the presence of weak dephasing, the answer depends on the quantity measured.
Out-of-equilibrium dynamics in AMO quantum simulators
Andrew Daley, University of Strathclyde
Over the past few years, the possibility to control and measure atomic and molecular systems time-dependently has generated a lot of progress in exploring out-of-equilibrium dynamics for strongly interacting many-particle systems. This connects directly to fundamental questions relating to the relaxation of such systems to equilibrium, as well as the spreading of correlations and build-up of entanglement.
Operational characterization of quantum properties
Marco Piani, University of Strathclyde
Quantum features like quantum superposition and quantum correlations — the latter comprising, but not limited to entanglement — are both of foundational and applicative interest. We develop tools to characterize such features operationally, looking for ways to detect, quantify, and utilize them. Some recent results I will report on regard the use of such features in the discrimination of physical processes, a task within the area of quantum metrology.
Quantum Information Enabled Neutron Interferometry
Joachim Nsofini, IQC
In the quest to explore big quantum systems, there have been opportunities to explore smaller quantum system like the neutron interferometer. A neutron interferometer (NI) has proven to be a useful tool in the study of quantum effects ranging from experiments with single particle interference to measuring quantities of significant importance in condensed-matter and Standard Model physics.
Scalable surface ion traps for high-fidelity quantum operations
Peter Maunz, Sandia National Laboratories
Trapped ion systems can be used to implement quantum computation as well as quantum simulation. To scale these systems to the number of qubits required to solve interesting problems in quantum chemistry or solid state physics, the use of large multi-zone ion traps has been proposed [1]. Microfabrication enables the realization of surface electrode ion traps with complex electrode structures.
Quantum Gravity, Tensor Network, and Holographic Entanglement Entropy
Muxin Han, Florida Atlantic University
The relation between nonperturbative Quantum Gravity and tensor network is explored from the perspectives of bulk-boundary duality and holographic entanglement entropy. We find that the quantum gravity states in a space Σ with boundary ∂Σ is an exact holographic mapping. The tensor network, understood as the boundary quantum state, is the output of the exact holographic mapping emerging from a coarse graining procedure of quantum gravity state.
Superconductivity in single-layer NbSe2
Kin Fai Mak, Pennsylvania State University
The discovery of graphene has stimulated not only the field of carbon nanoelectronics, but also studies of novel electronic phenomena in a wide range of atomically thin van der Waals’ materials. In this talk, I will discuss our recent effort in the isolation of a single layer of niobium diselenide (NbSe2), a new non-centrosymmetric superconductor.
The puzzle of genuine multiparticle interference
Sascha Agne, IQC
Two recent experiments demonstrate access to a new realm of quantum phenomena called genuine multiparticle interference. For three photons this means that interference between all three photons is observed while, simultaneously, neither pairs nor single photons display interference.
Rigorous RG algorithms and area laws for low energy eigenstates in 1D
Thomas Vidick, California Institute of Technology
One of the central challenges in the study of quantum many-body systems is the complexity of simulating them on a classical computer. We give a new algorithm for finding low energy states for 1D systems, based on a rigorously justified RG type transformation.
