Universal Variational Quantum Computation
28 Oct 2019 | | Contributor(s):: Jacob Biamonte
We show that the variational approach to quantum enhanced algorithms admits a universal model of quantum computation.
Machine Learning for Quantum Control
28 Oct 2019 | | Contributor(s):: Barry Sanders
We develop a framework that connects reinforcement learning with classical and quantum control, and this framework yields adaptive quantum-control policies that beat the standard quantum limit, inspires new methods for improving quantum-gate design for quantum computing, and suggest new ways to...
On Topological Quantum Computing
28 Oct 2019 | | Contributor(s):: Shawn Xingshan Cui
We give an introduction to the theory of topological quantum computing (TQC), which is an approach to realizing quantum computation with non-Abelian anyons.
Kirkman’s Schoolgirls and Quantum Spin Pairs: A 175 Year Long Thread Through Mathematics and Physics
15 Oct 2019 | | Contributor(s):: A. Ravi. P. Rau
A recreational puzzle posed 175 years ago of 15 schoolgirls to walk three abreast to school for seven days of the week so that no girl sees a friend repeated in her row has links to many areas of mathematics: combinatorics, finite projective geometries, design and coding theory, etc.
Entanglement, Discord and Other Quantum Correlations
We will discuss states and operators of two (or more) qubits, and higher dimensional "qudits," from the symmetry groups and algebras pertaining to them. The study of the time evolution of such systems can gain much from the insights and techniques provided by such considerations,...
Towards Quantum Information Processing with Atom-Filled Hollow-Core Fibres
10 Oct 2019 | | Contributor(s):: Ben Sparkes
I will present results from our experiments aiming for efficient, coherent and noiseless storage of high-bandwidth optical pulses in warm rubidium-filled HCPCFs using the off-resonance cascade absorption (ORCA) technique.
International Symposium of Quantum Science & Technology
01 Jun 2019 | | Contributor(s):: Yong P. Chen (organizer)
This symposium will review the current status and important recent international developments in quantum science and technology, and will help chart future directions for this hot-button topic.
Peculiar Corners of Hilbert Space where Strange States Lie
01 Jun 2019 | | Contributor(s):: Chris H Greene
This talk will summarize some of the peculiar states that have been found, which relate in some cases to Efimov physics, and in other cases to ultra-long-range Rydberg molecules, sometimes referred to as ‘trilobite’ or ‘butterfly’ molecules and their ghosts.
Quantum Optics on a Nonlinear Chip
08 May 2018 | | Contributor(s):: Alexander Solntsev
Bringing the concepts of quantum entanglement and optical nonlinearity together, and integrating them on a chip, opens a way to efficient generation of entangled photons and entanglement.
Quantum Control Over Diamond Spins with a Mechanical Resonator
24 Jan 2018 | | Contributor(s):: Gregory David Fuchs
I will describe our experiments to coherently couple NV center spins to gigahertz-frequency mechanical resonators using crystal lattice strain. In high-quality diamond mechanical resonators, we demonstrate coherent Rabi oscillations of NV center spins driven by mechanical motion instead of an...
Looking Through a Sphere: Walks With Mie Theory Along Classical Optics, Plasmonics and Nanooptics
26 Oct 2017 | | Contributor(s):: Boris Luk'yanchuk
Here we discuss some effects in plasmonics: inverse hierarchy of optical resonances, Fano resonances and optical vortices. Other effects are related to transparent materials with relatively small refractive indices (n < 2): photonic nanojets, magnetic nanojets and super resolution nanoscopy....
Novel Plasmonic Materials and Nanodevices for Integrated Quantum Photonics
19 Jun 2017 | | Contributor(s):: Mikhail Shalaginov
This research focuses on color centers in diamond that share quantum properties with single atoms. These systems promise a path for the realization of practical quantum devices such as nanoscale sensors, single-photon sources, and quantum memories. In particular, we explored an intriguing...
Coherent Nonlinear Optical Propagation Processes in Hyperbolic Metamaterials
08 Jun 2017 | | Contributor(s):: Alexander K. Popov
Coherence and interference play an important role in classic and quantum physics. Processes to be employed can be significantly enhanced and the unwanted ones suppressed through the deliberately tailored constructive and destructed interference at quantum transitions and at nonlinear optical...
08 Jun 2017 | | Contributor(s):: Vladimir M. Shalaev
Opening remarks for the 2017 Purdue Quantum Center workshop.
2017 Purdue Quantum Center Workshop: Coherent Effects in Physics and Chemistry
28 Apr 2017 | | Contributor(s):: Vladimir M. Shalaev, Mikhail Shalaginov
Presentations for this workshop are in production and will be available in the next 30 days Click on image to download high resolution image
Photons as 'Glue' for Dissimilar Quantum Systems
12 Apr 2016 | | Contributor(s):: Oliver Benson
Here we report on different photon sources, which could be part of a quantum hybrid architecture or which could provide the‘glue’for dissimilar quantum systems. The talk concerns on the one hand the integration of stable emitters as reliable sources and on the other hand the...
Light Matter Interfaces for NV Center in Diamond
11 Apr 2016 | | Contributor(s):: Alexey V Akimov
The NV center in diamond is attracting a lot of attention within the quantum information processing community. As a spin system in a clean and well-controlled environment of the diamond lattice, it exhibits outstanding performance as a quantum memory, even at room temperature....
Beyond the Heisenberg Uncertainty Principle in the Negative Mass Reference Frame
07 Apr 2016 | | Contributor(s):: Eugene Polzik
Measurements of one quadrature of an oscillator with precision beyond its vacuum state uncertainty have occupied a central place in quantum physics for decades. A squeezed state of one of the quadratures is a prominent example of a state which provides such precision. One of the first proposals...
05 Apr 2016 | | Contributor(s):: Vladimir M. Shalaev
Quantum Error Correction for Metrology
05 Apr 2016 | | Contributor(s):: Fedor Jelezko
I will discuss recent developments transforming quantum control tools into quantum technologies based on single nitrogen-vacancy (NV) centers in diamond. I will present ultrasensitive MRI at nanoscale and recently developed magnetometry protocols that use quantum error correction as a resource....