Publications (24)
Do Generalized-Gamma Scale Mixtures of Normals Fit Large Image Datasets?
Brandon Marks, Yash Dave, Zixun Wang +5
A scale mixture of normals is a distribution formed by mixing a collection of normal distributions with fixed mean but different variances. A generalized gamma scale mixture draws…
A Security Assessment tool for Quantum Threat Analysis
Basel Halak, Cristian Sebastian Csete, Edward Joyce +5
The rapid advancement of quantum computing poses a significant threat to many current security algorithms used for secure communication, digital authentication, and information enc…
Validating Terrain Models in Digital Twins for Trustworthy sUAS Operations
Arturo Miguel Russell Bernal, Maureen Petterson, Pedro Antonio Alarcon Granadeno +3
With the increasing deployment of small Unmanned Aircraft Systems (sUAS) in unfamiliar and complex environments, Environmental Digital Twins (EDT) that comprise weather, airspace,…
Super-resolved multispectral lensless microscopy via angle-tilted, wavelength-multiplexed ptychographic modulation
Pengming Song, Ruihai Wang, Jiakai Zhu +8
We report an angle-tilted, wavelength-multiplexed ptychographic modulation approach for multispectral lensless on-chip microscopy. In this approach, we illuminate the specimen with…
OpenWSI: a low-cost, high-throughput whole slide imaging system via single-frame autofocusing and open-source hardware
Chengfei Guo, Zichao Bian, Shaowei Jiang +7
Recent advancements in whole slide imaging (WSI) have moved pathology closer to digital practice. Existing systems require precise mechanical control and the cost is prohibitive fo…
Colloquium: Trapped ions as quantum bits -- essential numerical tools
Kilian Singer, Ulrich Poschinger, Michael Murphy +4
Trapped, laser-cooled atoms and ions are quantum systems which can be experimentally controlled with an as yet unmatched degree of precision. Due to the control of the motion and t…
Deep-ultraviolet ptychographic pocket-scope (DART): mesoscale lensless molecular imaging with label-free spectroscopic contrast
Ruihai Wang, Qianhao Zhao, Julia Quinn +11
The mesoscale characterization of biological specimens has traditionally required compromises between resolution, field-of-view, depth-of-field, and molecular specificity, with mos…
Scalable quantum computation via local control of only two qubits
Daniel Burgarth, Koji Maruyama, Michael Murphy +4
We apply quantum control techniques to control a large spin chain by only acting on two qubits at one of its ends, thereby implementing universal quantum computation by a combinati…
A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyman-alpha systems
Ryan Cooke, Max Pettini, Michael Murphy
We report the identification of a very metal-poor damped Lyman-alpha system (DLA) at z_abs = 3.067295 that is modestly carbon-enhanced, with an iron abundance of ~1/700 solar ([Fe/…
Cognition Envelopes for Bounded Decision Making in Autonomous UAS Operations
Pedro Antonio Alarcon Granadeno, Arturo Miguel Bernal Russell, Sofia Nelson +5
Cyber-physical systems increasingly rely on foundational models, such as Large Language Models (LLMs) and Vision-Language Models (VLMs) to increase autonomy through enhanced percep…
High error-rate quantum key distribution for long-distance communication
Muhammad Mubashir Khan, Michael Murphy, Almut Beige
In the original BB84 protocol by Bennett and Brassard, an eavesdropper is detected because his attempts to intercept information result in a quantum bit error rate (QBER) of at lea…
HIFuzz: Human Interaction Fuzzing for small Unmanned Aerial Vehicles
Theodore Chambers, Michael Vierhauser, Ankit Agrawal +5
Small Unmanned Aerial Systems (sUAS) must meet rigorous safety standards when deployed in high-stress emergency response scenarios; however many reported accidents have involved hu…
Extending MAPE-K to support Human-Machine Teaming
Jane Cleland-Huang, Ankit Agrawal, Michael Vierhauser +2
The MAPE-K feedback loop has been established as the primary reference model for self-adaptive and autonomous systems in domains such as autonomous driving, robotics, and Cyber-Phy…
Towards an experimentally feasible controlled-phase gate on two blockaded Rydberg atoms
Matthias M. Müller, Michael Murphy, Simone Montangero +3
We investigate the implementation of a controlled-Z gate on a pair of Rydberg atoms in spatially separated dipole traps where the joint excitation of both atoms into the Rydberg le…
Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3
Paola RodrÃguez Hidalgo, Michael Eracleous, Jane Charlton +3
We present the detection of a rare case of dramatic strengthening in the UV absorption profiles in the spectrum of the quasar J115122.14+020426.3 between observations ~2.86 years a…
Efficiently predicting high resolution mass spectra with graph neural networks
Michael Murphy, Stefanie Jegelka, Ernest Fraenkel +3
Identifying a small molecule from its mass spectrum is the primary open problem in computational metabolomics. This is typically cast as information retrieval: an unknown spectrum…
Communication at the quantum speed limit along a spin chain
Michael Murphy, Simone Montangero, Vittorio Giovannetti +1
Spin chains have long been considered as candidates for quantum channels to facilitate quantum communication. We consider the transfer of a single excitation along a spin-1/2 chain…
Which Cubic Graphs have Quadrangulated Spherical Immersions?
Lowell Abrams, Yosef Berman, Vance Faber +1
We consider spherical quadrangulations -- spherical embeddings of multigraphs, possibly with loops, so that every face has boundary walk of length 4 -- in which all vertices have d…
Optimal Control at the Quantum Speed Limit
Tommaso Caneva, Michael Murphy, Tommaso Calarco +4
Optimal control theory is a promising candidate for a drastic improvement of the performance of quantum information tasks. We explore its ultimate limit in paradigmatic cases, and…
Resolution-enhanced parallel coded ptychography for high-throughput optical imaging
Shaowei Jiang, Chengfei Guo, Pengming Song +11
Ptychography is an enabling coherent diffraction imaging technique for both fundamental and applied sciences. Its applications in optical microscopy, however, fall short for its lo…
Cognitive Guardrails for Open-World Decision Making in Autonomous Drone Swarms
Jane Cleland-Huang, Pedro Antonio Alarcon Granadeno, Arturo Miguel Russell Bernal +4
Small Uncrewed Aerial Systems (sUAS) are increasingly deployed as autonomous swarms in search-and-rescue and other disaster-response scenarios. In these settings, they use computer…
A Catalog of High-Velocity CIV Mini-BALs in the VLT-UVES and Keck-HIRES Archives
Chen Chen, Fred Hamann, Bo Ma +1
We present a catalog of high-velocity CIV 1548,1551 mini-Broad Absorption Lines (mini-BALs) in the archives of the VLT-UVES and Keck-HIRES spectrographs. We identify high-velo…
High-fidelity fast quantum transport with imperfect controls
Michael Murphy, Liang Jiang, Navin Khaneja +1
Effective transport of quantum information is an essential element of quantum computation. We consider the problem of transporting a quantum state by using a moving potential well,…
When Does Continual Learning Require Learning
Anne Harrington, Nayan Saxena, Michael Murphy +7
As large language models (LLMs) become increasingly capable, the next question is how can we enable models to continually learn? Today, the field largely frames this as a problem o…