Stanford University
Showing 11,551-11,600 of 34,469 Results
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Sean Hartnoll
Principal Investigator, Stanford Institute for Materials and Energy Sciences
BioI am a theorist working on problems in gravitational, high energy and condensed matter physics. In recent years the holographic correspondence, the physics of quantum entanglement and quantum field theory more generally have led to strong connections between central concerns in these different fields.
For example, I am interested in understanding the emergence of spacetime from large N matrix quantum mechanics models. These can be thought of as the simplest models of holographic duality, and will likely hold the key to understanding the emergence of local physics as well as black holes. The most basic object in these theories is the ground state wavefunction. Understanding this wavefunction is a many-body problem and I am interested in using modern ideas from condensed matter theory -- such as topological order -- to characterize it.
Another example has to do with dissipation. How quickly can a quantum mechanical system thermalize itself? From this perspective, there are remarkable similarities between strongly quantum mechanical systems such as the quark-gluon plasma and high temperature superconductors and the dynamics of black holes in classical gravity. This may suggest that a fundamental limitation imposed by quantum statistical mechanics is at work in these systems. I have pursued this possibility from many angles, including variational principles for entropy production, the Lieb-Robinson bound on velocities in quantum systems and bounds on the magnitude of quantum fluctuations near thermal equilibrium.
In parallel to a ''bird's eye'' approach to quantum statistical mechanics, I am also increasingly interested in specific scattering mechanisms in unconventional materials that may give a relatively simple explanation of transport behavior that has otherwise been considered anomalous --- using this approach my collaborators and I have 'demystified' aspects of transport in quantum critical ruthenate materials. I am currently interested, for example, in the role of phonons in strongly correlated electronic systems.
I have recently worked on black hole interiors in classical gravity. Black hole interiors are extremely rich mathematically, but their physical interpretation -- for example in a holographic context -- remains obscure. To start to address this question I have shown how important dynamics of the interior, such as the instability of the singularity and of Cauchy horizons, can be triggered in a relatively simple holographic setting.
Lists of my publications and of recorded talks and lectures can be found following the links on the right. -
Stella Hartono
Clinical Assistant Professor, Medicine - Pulmonary, Allergy & Critical Care Medicine
BioStella Hartono, MD PhD is a board-certified allergy/immunology physician and clinical researcher. She specializes in diagnosing and treating immunology and allergic conditions, with a focus on immunodeficiency, immune dysregulation, hyper eosinophilia, and pet allergies.
Dr. Hartono’s clinical research focuses on the role of age-associated B cells in vaccine response and the aging immune system. She is also interested in improving diagnosis and treatment options for patients with CVID (common variable immunodeficiency) and SAD (specific antibody deficiency). She has published her original research in peer-reviewed scientific journals and presented at national conferences, including annual meetings for the Clinical Immunology Society and the American Academy of Asthma, Allergy, and Immunology, as well as international conferences, including annual meeting for the European Academy of Allergy and Clinical Immunology. Dr. Hartono is a member of the American Academy of Asthma, Allergy, and Immunology, the Clinical Immunology Society, and the American College of Allergy, Asthma, and Immunology. -
Grant Hartung
Affiliate, Rad/Radiological Sciences Laboratory
BioMy research includes developing custom mathematical models and algorithms to comprehensively simulate the biophysics underlying brain dynamics. These models are then used to simulate the detailed blood flow, volume, and oxygenation changes that accompany neural activity with a focus on detailed, realistic microvascular geometry to predict the impact of hemodynamic states and vascular structure on fMRI signals (for BOLD and non-BOLD sequences). This interdisciplinary work includes advances in mathematics, biophysics, neuroscience, and computer science to enable simulations of vascular structures orders of magnitude larger than previously possible in only a few hours.
These advancements have led to the quantification of many fMRI biases previously overlooked or undervalued. This includes the geometric blurring by the capillary bed between the site of neurovascular coupling and the venous response, ultimately measured by BOLD. Moreover, the microvascular blood volume at resting-state gave a non-neuronal explanation for the mid-cortex “bump” observed in layer-fMRI BOLD signals. This tool also proposed mechanistic explanations underlying the BOLD frequency nonlinearity observed during oscillatory stimulus. In non-BOLD acquisitions, these tools discovered artifacts in IntraVoxel Incoherent Motion (IVIM) and VAscular Space Occupancy (VASO) signals caused by vascular structural and flow asymmetries and velocity heterogeneity which help explain discrepancies in experimental findings with these methods.
Google Scholar: https://scholar.google.com/citations?user=ihwU5t8AAAAJ&hl=en
Email: grant.hartung@tu-darmstadt.de -
Matt Harvey
Chief Corporate Engagement Officer, Stanford Engineering Center for Global and Online Education
BioMatt Harvey is the chief corporate engagement officer with the Stanford Engineering Center for Global and Online Education (CGOE). He is responsible for leading development of corporate, collaborator, and prospective donor relationships to drive sustainable engagement and growth opportunities for CGOE, Stanford Enterprise Education, and Stanford Online. As a member of CGOE’s senior leadership team, he also serves as an executive lead for organizational development initiatives.
Matt previously served at CGOE as senior director of global partnerships and professional programs, where he developed global collaboration relationships and provided strategic direction for CGOE's professional programs and open course portfolios. Prior to that as executive director of the Stanford Technology Ventures Program (STVP), the entrepreneurship center in Stanford Engineering, he led external relations and provided direction for STVP’s operations, communications, and digital products, including Stanford eCorner, a multimedia digital learning platform to support entrepreneurship and innovation educators and aspiring entrepreneurs around the world. Prior to joining Stanford, Matt worked in content strategy and marketing roles for firms in the tech, entertainment, and non-profit sectors. A Silicon Valley native, Matt holds a degree in Television and Film from San Jose State University. -
Lindsey Hasak
Social Science Researcher, Research Staff - Other
BioDr. Lindsey Hasak is the Director of Research and Partnerships for the Accelerating Literacy via Digital Technology project at Stanford's Language to Literacy Research Lab in the Graduate School of Education. She has worked in research-practice partnerships across public and private K–8 schools, leading projects focused on early literacy instruction, the cognitive neuroscience of reading skills, and inclusive teaching practices. Her doctoral research examined how linguistic factors and educational experiences shape spelling acquisition through the co-design of instructional strategies with teachers. Lindsey holds a B.S. in Psychology and a B.A. in English from the University of Florida, and a Ph.D. in Developmental and Psychological Sciences from Stanford University.
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Areeq Hasan
Ph.D. Student in Applied Physics, admitted Autumn 2024
Current Research and Scholarly InterestsInterested in the fundamental physics of strongly-correlated quantum many-body systems and creating new ways to control their dynamics. Intending to use the experimental platform of ultracold atoms to explore how nature invokes entanglement in the physics of many-body systems and build new ways to control the coherent quantum dynamics of strongly-correlated systems towards the end of quantum information processing.
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Earth Hasassri, MD
Adjunct Clinical Assistant Professor [Shc], Psychiatry and Behavioral Sciences - Child & Adolescent Psychiatry and Child Development
BioDr. Earth Hasassri is an Adjunct Clinical Assistant Professor in the Department of Psychiatry and Behavioral Sciences, Division of Child and Adolescent Psychiatry and Child Development at Stanford University School of Medicine. He has a private practice in Menlo Park and teaches medical students, residents, and fellows at Stanford University School of Medicine. In his private practice, he specializes in seeing children and adults with complex psychiatric conditions such as ADHD, autism spectrum disorders, functional neurological disorders, those with epilepsy, and other neuropsychiatric conditions. His interests are caring for individuals who suffer from medical conditions at the interface of medicine and psychiatry.
Prior to medical school, Dr. Hasassri graduated with dual bachelor's degrees in neurophysiology and psychology at the University of California San Diego, where he performed research on sleep medicine. He earned his medical degree from the Mayo Clinic Alix School of Medicine where he did research in clinical epidemiology. Dr. Hasassri completed his residency in general psychiatry at the University of California San Francisco Langley Porter Psychiatric Hospitals & Clinics, during which he was awarded an Area of Distinction in Clinical Neuroscience for his work in applying neuroscientific principles in his clinical work in those with brain cancer, dementia, neurodevelopmental disorders, and other neuropsychiatric conditions. Dr. Hasassri is dual board certified in adult psychiatry and in child and adolescent psychiatry through the American Board of Psychiatry and Neurology, a member Board of the American Board of Medical Specialties. -
Elaheh Hashemi
Postdoctoral Scholar, Pathology
BioI am a postdoctoral researcher specializing in computational biology, bioinformatics, and multi-omics data analysis. My research focuses on integrating single-cell, spatial transcriptomic, and clinical datasets to better understand cellular heterogeneity and disease biology. I am passionate about using computational approaches to uncover biological mechanisms and translate complex datasets into insights that can ultimately improve human health. Outside of research, I enjoy hiking, mountaineering, camping, and playing the piano.
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Hoda Hashemi
Postdoctoral Scholar, Radiological Sciences Laboratory
BioHoda S. Hashemi is a postdoctoral scholar at the Ultrasound Imaging & Instrumentation Lab at Stanford University. She received her PhD in Electrical and Computer Engineering from the University of British Columbia (UBC) in 2023. She was also an ultrasound research intern in research and innovation team at DarkVision Technologies Inc. from 2021 to 2023. She holds a M.A.Sc. from Concordia University and a B.Sc. from Sharif University of Technology. Her research interests are ultrasound molecular imaging, elastography and AI in medical image processing. Her research has been funded by the NIH T32 Fellowship at Stanford, the Canadian NSERC Postdoctoral Fellowship, and the Ultrasound Imaging & Instrumentation Lab at Stanford University.
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Rhana Hashemi
Ph.D. Student in Psychology, admitted Autumn 2022
BioRhana Hashemi is a Ph.D. student in Social Psychology conducting social-belonging and stereotype threat research with Dr. Greg Walton. She is focused on improving the lives of students who use drugs by understanding and repairing the relationship they form with their schools and authority figures. Rhana hopes to design interventions that promote connection and reduce bias, as alternatives to school suspension. She holds a M.S in Community Health Prevention Research from Stanford School of Medicine and a B.A in Social Welfare with honors from UC Berkeley. Previous research has focused on cognitive dissonance theory, prevention messaging, social media, and adolescent substance use.
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Karolina Hasiec
Masters Student in Bioengineering, admitted Autumn 2025
BioKarolina’s research at King’s College London focused on neuroimaging and on how analytical methods can be tailored to the unique characteristics of different imaging tools. At Stanford, she is supporting research that investigates whether myelin plasticity can serve as a tractable therapeutic target to slow the progression of SYNGAP1-related intellectual disability - a rare neurodevelopmental disorder characterized by severe, intractable epilepsy, significant cognitive impairment, and recognized as one of the leading genetic causes of autism. Through this work, she contributes to advancing understanding of how maladaptive myelination may underlie disease progression and to exploring new strategies for therapeutic intervention.
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William Haskell
Professor (Research) of Medicine, Emeritus
Current Research and Scholarly InterestsMy major research interests and activities over the next several years will focus on the development and evaluation of the objective measurement of physical activity in free-living populations using a variety of sensing devices and mobile phones for data collection and processing. Also, I will continue to direct the Stanford Heart Network with the major mission being to assist community-based CVD prevention/treatment programs implement more effective heart attack and stroke prevention programs.
