Arnab Sen
United Kingdom
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Articles by Arnab Sen
Few-femtosecond photoelectron spectroscopy reveals fundamental photodynamics of the carbon-carbon double bond in ethylene
Abstract Conjugated π-systems, often composed of carbon-carbon double bonds as key structural units, are among the most important organic chromophores and serve as prototypical systems for studying ππ* excitation. Their ultrafast excited-state dynamics govern the outcomes of fundamental photochemical processes, including vision, photoisomerization, photosynthesis, and solar energy conversion.
Why 2026 Will Redefine Data Engineering as an AI-Native Discipline
Industries are walking into 2026 with a mix of urgency and opportunity. Gartner predicts that by next year, AI agents will influence nearly half of all business decisions. That dramatically raises the stakes for data readiness. Over the past year, AI has moved from experimentation into real workflows, revealing a simple truth: an AI model is only as good as the data that powers it. Data engineering is no longer a backstage function.
Activation Oracles: Training and Evaluating LLMs as General-Purpose Activation Explainers
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[2510.26784] LLMs Process Lists With General Filter Heads
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
[2505.14685] Language Models use Lookbacks to Track Beliefs
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Strategies for addressing the biggest revenue cycle management challenges
By Arnab Sen After a challenging few years post-pandemic, hospital and health system finances have slowly started to stabilize, with many providers entering 2025 in better shape. Key metrics, such as operating margins, revenue, and length of stay, have shown signs of improvement for many health systems, particularly those in high-growth areas.
Recent increase in surface melting of West Antarctic ice shelves linked to Interdecadal Pacific Oscillation - Communications Earth & Environment
Abstract Since the late 1990s, summer surface melt across ice shelves in the Ross-Amundsen Sea sector of West Antarctica increased significantly, as demonstrated by satellite measurements and MetUM simulations. This contrasts with the period from 1979 to the late 1990s, which witnessed a decreasing summer melt trend driven by the positive trend in Southern Annular Mode.
Top Data Engineering Trends for 2025
6 minutes ago expresscomputer.in By Arnab Sen, VP, of Data Engineering, Tredence The world is becoming more data-driven, and enterprises are racing to extract maximum value from their datasets. By 2025, various transformational trends will enable organisations to improve operational efficiency and enhance innovation at a faster rate.
Teleconnection and the Antarctic response to the Indian Ocean Dipole in CMIP5 and CMIP6 models
1 INTRODUCTION Over recent decades, the Antarctic region has experienced substantial climatic change (Stokes et al., 2022; Turner et al., 2005), which includes the rise of surface air temperature over West Antarctica and the Antarctic Peninsula (Bromwich et al., 2013; Johnson et al., 2022), the increase of ocean heat content and subsurface ocean temperature (Domingues et al., 2008; Spence et al., 2014), and rapid reduction in sea-ice cover after 2015 (Parkinson, 2019; Turner et al., 2017).
Resolving Revenue Cycle Challenges Without Risky Tech Investments
RCM is ripe for tech innovation but harnessing its value requires the right talent, innovative technology, partnership, and collaboration. Hospitals and health systems face significant bottom line pressure, from inflation and escalating costs to supply chain issues and staffing shortages. The shortages are not only among nurses and physicians, either. One of the hardest-hit areas involves staff who manage revenue cycle processes.
The Quest for the Right Mediator: Surveying Mechanistic Interpretability Through the Lens of Causal Mediation Analysis
[Submitted on 2 Aug 2024 ( v1 ), last revised 10 Sep 2025 (this version, v2)] Title:The Quest for the Right Mediator: Surveying Mechanistic Interpretability Through the Lens of Causal Mediation Analysis Authors:Aaron Mueller , Jannik Brinkmann , Millicent Li , Samuel Marks , Koyena Pal , Nikhil Prakash , Can Rager , Aruna Sankaranarayanan , Arnab Sen Sharma , Jiuding Sun , Eric Todd , David Bau , Yonatan Belinkov View a PDF of the paper titled The Quest for the Right Mediator: Surveying...
Unleashing the Dynamic Force of AI and Automation to Revolutionize Revenue Cycle Management
Every year, hospitals across the United States, regardless of their size or type, face significant financial losses amounting to hundreds of billions of dollars due to uncompensated care. This staggering figure does not even consider the additional losses incurred by hospitals as a result of underpayments from government-funded healthcare programs such as Medicare and Medicaid.
Fulfilling technology's promise to improve clinician and patient experiences
Mar 27 Arnab Sen, chief strategy officer of Omega Healthcare, talks about how technology can help healthcare organizations boost productivity, make the treatment process easier for patients to understand and reduce clinician burnout.
Weak universality, quantum many-body scars, and anomalous infinite-temperature autocorrelations in a one-dimensional spin model with duality
We study a one-dimensional spin-1/2 model with three-spin interactions and a transverse magnetic field h. The model is known to have a Z2×Z2 symmetry and a duality between h and 1/h. The self-dual point at h=1 is a quantum critical point with a continuous phase transition. We compute the critical exponents z, β, γ, and ν, and the central charge c numerically using exact diagonalization (ED) for systems with periodic boundary conditions.
Evolution in ETL: How Skipping Transformation Enhances Data Management
Image by Editor Few data concepts are more polarizing than ETL (extract-transform-load), the preparation technique that has dominated enterprise operations for several decades. Developed in the 1970s, ETL shined during an era of large-scale data warehouses and repositories. Enterprise data teams centralized data, layered reporting systems and data science models on top, and enabled self-service access to business intelligence (BI) tools.
[2310.15213] Function Vectors in Large Language Models
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Row, Row, Raft Your Nodes: A Guide to Consensus in Distributed Systems
I have been recently diving into the world of Distributed systems and I came across a rather interesting paper: "In Search of an Understandable Consensus Algorithm". What caught my attention was the paper's primary objective of creating a consensus algorithm that is easy to understand. Typically, in the realm of new research, we tend to emphasize factors like efficiency, correctness, and conciseness while overlooking how accessible a concept is for others to grasp and apply in practical scenarios.
Council Post: How Cloud FinOps Aim To Rein In Cloud Spending
Arnab Sen is VP, Data Engineering, Tredence Inc. - a global leader in data science and AI solutions, solving the last-mile problem in AI. Migrating to the cloud has long been seen as a way for organizations to save money. The whole point of implementing this practice, after all, is to reduce operational costs. But these promised savings from migrating workloads to the cloud have failed to appear. In fact, many face the opposite problem: surging costs.
[2308.09124] Linearity of Relation Decoding in Transformer Language Models
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
[2210.07229] Mass-Editing Memory in a Transformer
[Submitted on 13 Oct 2022 ( v1 ), last revised 1 Aug 2023 (this version, v2)] Title:Mass-Editing Memory in a Transformer Download a PDF of the paper titled Mass-Editing Memory in a Transformer, by Kevin Meng and 4 other authors Download PDF Abstract: Recent work has shown exciting promise in updating large language models with new memories, so as to replace obsolete information or add specialized knowledge. However, this line of work is predominantly limited to updating single associations.
Striking the Balance between Progress and Responsibility
With the potential to completely disrupt many facets of our lives, artificial intelligence (AI) has emerged as a transformative technology. The applications of AI seem to be endless, spanning industries including healthcare, banking, transportation, and customer service. The ethical issues raised by the creation and use of AI must be addressed even as we applaud the advancement and innovation it has sparked.
Prominent quantum many-body scars in a truncated Schwinger model
The high level of control and precision achievable in current synthetic quantum matter setups has enabled first attempts at quantum-simulating various intriguing phenomena in condensed matter physics, including those probing thermalization or its absence in closed quantum systems. In the companion Letter to this article [J.-Y. Desaules et al., Phys. Rev.
Landing a Google SWE Internship: Interview Experience and preparation journey
Even though, there is a plethora of articles on Google SWE Internship interview experience online, I am still frequently asked the following questions: How did you crack Google SWE Internship? Which resources did you follow? Can you share some interview tips for my upcoming interview? Was it on-campus or off-campus? ... and many more. So, I decided to pen down my thoughts so that I can share this article next time someone asks me anything about my SWE Internship.
[2303.06084] Some Rigorous Results on the Lévy Spin Glass Model
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Weak Universality Induced by $Q=\ifmmode\pm\else\textpm\fi{}2e$ Charges at the Deconfinement Transition of a ($2+1$)-Dimensional U(1) Lattice Gauge Theory
Abstract Matter-free lattice gauge theories (LGTs) provide an ideal setting to understand confinement to deconfinement transitions at finite temperatures, which is typically due to the spontaneous breakdown (at large temperatures) of the center symmetry associated with the gauge group. Close to the transition, the relevant degrees of freedom (Polyakov loop) transform under these center symmetries, and the effective theory depends on only the Polyakov loop and its fluctuations.
Rafael Nadal Keeps His Date With History, Wins Australian Open To Become First Man To Reach 21 Grand Slam Titles
Rafael Nadal won the 2022 Australian Open title by beating Daniil Medvedev Rafael Nadal on Sunday achieved what no other male tennis player has in the history of the sport. The Spaniard, synonymous with greatness on clay court, became the first man to win 21 Grand Slam titles, reaching the milestone at the hard court of the Rod Laver Arena in Melbourne as he outslugged Russia's Daniil Medvedev, to win the Australian Open 2022 men's singles title.
How I refactored a nested if/else validation using a design pattern
photo credit: Anh T. Dang Arnab Sen · Follow 5 min read · Jan 23, 2022 -- If/else statement is an integral part of any programming language, however with today's coding standard with modern coding style it should be used with care. Especially we should be careful when we write else if and else clauses.
Signatures of multifractality in a periodically driven interacting Aubry-Andr\'e model
Abstract We study the many-body localization (MBL) transition of Floquet eigenstates in a driven, interacting fermionic chain with an incommensurate Aubry-André potential and a time-periodic hopping amplitude as a function of the drive frequency ωD using exact diagonalization (ED).
Genetic characterization of African swine fever virus from domestic pigs in India
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Coincident angle-resolved state-selective EUV photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics
Coincident angle-resolved state-selective EUV photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics suddhasattwa mandal, Ram Gopal, Hemkumar Srinivas, Alessandro D'Elia, Arnab Sen, Sanket Sen, Robert RICHTER, Marcello Coreno, Bhas Bapat, Marcel Mudrich, Vandana Sharma and Sivarama Krishnan Abstract The acetylene-vinylidene system serves as a benchmark for investigations of ultrafast dynamical processes where the coupling of the electronic and...
Disorder-free localization and many-body quantum scars from magnetic frustration
Abstract The concept of geometrical frustration has led to rich insights into condensed matter physics, especially as a mechanism to produce exotic low-energy states of matter. Here we show that frustration provides a natural vehicle to generate models exhibiting anomalous thermalization of various types within high-energy states.
IPL 2019 | EXCLUSIVE: Owe my success to Gautam Gambhir and Shane Warne, says Kuldeep Yadav - Watch
‘It has been 6 years now that I have been with Kolkata Knight Riders and they are like family to me. Everyone supports each other in the bunch’, says Kuldeep Yadav “Success is not final, failure is not fatal; it is the courage to continue that counts,” these words of Winston Churchill could well define Kolkata Knight Riders skipper Dinesh Karthik’s decision to hand the ball to Kuldeep Yadav for the crucial final over against Delhi Capitals on Saturday.
Hima Das: Sprinter Extraordinaire Who Likes to Keep the Best for the Last
"Jo last 100 metres me karke dikhata hai, uska naam Hima Das hota hai" (Hima Das is the one who turns the tables in the last 100 metres). These were the words of 18-year old Hima Das when she spoke to her coach before the final of the 400 metres race at the IAAF World Under-20 Athletics Championships. And Hima walked the talk on the track as she blazed her way to glory, speeding away from the rest of the pack to become the first Indian to win a track medal at a global event.
FIFA World Cup 2018: How Southgate's Boys Brought Belief and Hope Back to English Football
"Let me tell you something, my friend. Hope is a dangerous thing..." said Ellis Boyd 'Red' Redding, the character played by Morgan Freeman in the cult Hollywood classic Shawshank Redemption. It was meant as a warning to the protagonist, to deter him from getting carried away.
FIFA World Cup 2018: Of Belgium's Golden Generation and Scifo's Prediction
Their nimble-footed counter-attacks, the creative genius of their mid-field duo, the safe pair of hands of their finest custodian ever and an experienced yet leaky defence's ability to soak in the pressure and just about not wilt in a crucial match finally gave Belgium's much touted Golden Generation its finest moment. The term 'Golden Generation' is often overused in sports, more so in football.
FIFA World Cup 2018: Of Belgium's Golden Generation and Scifo's Prediction
Their nimble-footed counter-attacks, the creative genius of their mid-field duo, the safe pair of hands of their finest custodian ever and an experienced yet leaky defence's ability to soak in the the pressure and just about not wilt in a crucial match finally gave Belgium's much touted Golden Generation its finest moment. The term 'Golden Generation' is often overused in sports, more so in football.
FIFA World Cup: The Very Tough Quiz
The 21st FIFA World Cup is underway in Russia and News18 Sports brings for the fans of the beautiful game a quiz that will test the depthof their knowledge of the showpiece event. Here it goes, try your luck - 1. Which first, to be used in this WC, was developed by the Brazilian sports journalist Pablo Silva and used by the Argentine Football Federation since 2008? 2.
FIFA World Cup 2018: Fever Catches up in India as Fans Gear Up for Opening Day
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Bayern Munich vs Real Madrid: Superheroes Galore, UEFA Champions League's Marquee Clash Returns
Ever imagined why Superheroes exist, or rather, why they sell like hot cakes both at the box-office counter as well as at the corner bookstore? Superheroes are the opium that allows people to momentarily forget their frailties. This constant desire to alleviate the suffering caused by ennui by investing in something larger than life leads to a cult following.
History of Test Cricket in the Land of Proteas
Home » Cricket Home » News » India in South Africa: History of Test Cricket in the Land of Proteas (1992-2013) 11-MIN READ Edited By: Arnab Sen Last Updated: January 04, 2018, 14:20 IST India, in their past six outings have failed to win a single series and have managed to win only two Test matches. Here's a look at India's Test history in the Rainbow Nation. India were the first country to visit South Africa, after their re-admission into international cricket post the apartheid era.
Frontiers in the Growth of Complex Oxide Thin Films: Past, Present, and Future of Hybrid MBE
Driven by an ever-expanding interest in new material systems with new functionality, the growth of atomic-scale electronic materials by molecular beam epitaxy (MBE) has evolved continuously since the 1950s. Here, a new MBE technique called hybrid-MBE (hMBE) is reviewed that has been proven a powerful approach for tackling the challenge of growing high-quality, multicomponent complex oxides, specifically the ABO perovskites.
Kidambi Srikanth: Gopi Sir Believed in Me More Than Anybody Else
New Delhi: Kidambi Srikanth isn't your regular modern day sportsperson. He seldom shows emotions, whether on court or off it. Unlike several other stars of his generation, who don't shy away from sharing their joy or disappointment with the world, Srikanth remains in the mould of his mentor Pullela Gopichand, an understated champion.
India vs New Zealand 1st ODI: Team India Report Card
India vs New Zealand 1st ODI: Team India Report Card New Zealand bowler Trent Boult (C) celebrates with teammates after taking the wicket of Indian cricketer Shikhar Dhawan during the first one-day international cricket match between India and New Zealand at the Wankhede stadium in Mumbai on October 22, 2017 (AFP Photo) Tom Latham and Ross Taylor shared a 200-run fourth wicket stand to guide New Zealand to a clinical 6-wicket win over India in the first one-day international at Mumbai's...
Asia Cup: Past Greats Hope Indian Hockey Doesn't Flatter to Deceive Again
Indian hockey has always been the choice of the romantics among sports lovers in the country. While it continues to be the national sport of India, even the most ardent supporters know that cricket's growth and popularity has surpassed that of hockey.
New Zealand in India: History of Bilateral ODI Series (1988 to 2016)
New Zealand in India: History of Bilateral ODI Series (1988 to 2016) A scene from an India vs New Zealand ODI during the bilateral series in 2016 (AFP Photo) Over the years India and New Zealand have locked horns in 98 one-day internationals with both teams enjoying a fair share of the spoils. India have registered 49 wins over the years, which is just 6 more than what the New Zealanders have (43) recorded.
Asia Cup Hockey: New Coach Marijne Wants India to Eliminate Defensive Blues
New Delhi: Newly appointed Indian men's hockey team coach Sjoerd Marijne will face his first big test once his wards start their Asia Cup campaign in Dhaka on Wednesday. India, who were the runners-up in the last edition held in 2013, go into the tournament as favourites given the fact that they are the only Asian side to be in the top 10 of the FIH rankings.
FIFA U-17 World Cup: What Friday the 6th Meant for an Indian Football Lover of the '90s
The 1990s was a time of great change for India at many levels. The post liberalisation economy led to an influx of cash at every level of the market and the society. 'Development' began to take place at a very swift pace. Money was the mantra wherever one went and we all slowly became a part of a chain reaction. Money was the society's new haemoglobin, and the middle-class were the red blood cells, increasing at a fast pace.
India vs Australia ODI Series - Team India Report Card
India vs Australia ODI Series - Team India Report Card India cricket team celebrate with the trophy after beating Australia 4-1 in the five match series. (BCCI/Twitter) India's domination over reigning world champions Australia was completed on Sunday night at Nagpur, as Virat Kohli's team raced to an easy 7-wicket win to wrap up the series and also returned to the top of the ICC ODI rankings by leapfrogging South Africa.
Hardik Pandya: Has India's Search for the Next Kapil Dev Ended?
Hardik Pandya: Has India's Search for the Next Kapil Dev Ended? A file photo of Hardik Pandya. (Image credit: AP) New Delhi: Robin Singh, Laxmi Ratan Shukla, Reetinder Singh Sodhi, Sanjay Bangar, Irfan Pathan, Joginder Sharma and Stuart Binny. These names are well known to Indian cricket fans. And those who have followed the game over the past three decades would know what these men symbolised. They were the supposed answer to Indian cricket's search for a (medium) pace bowling all-rounder.
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