Subhasree Patro

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About me

I recently completed my PhD from QuSoft, CWI which is also known as the Algorithms and Complexity Group at CWI. I started two postdoc positions from April 1, 2023; one in the computer science and physics department at Utrecht University (Netherlands) with Hans Bodlaender and the other postdoc position at QuSoft with Stacey Jeffery. I am broadly interested in the area of quantum computational complexity theory. More specifically, in quantum fine-grained complexity. In addition to that, I am also interested in classical decision tree complexity and quantum query complexity of Boolean relations, and the connections between them. Here is the summary of my research.

I am also a mother of an adorable five-year old.

Name:	Subhasree Patro
Affiliation:	QuSoft, Centrum Wiskunde & Informatica, University of Amsterdam
Work address:	L218, CWI
	Science Park 123
	1098 XG, Amsterdam
	The Netherlands
Email:	patrofied at gmail dot com
Links:	CV, Google Scholar, dblp

Publications

• Teleportation of Quantum Coherence with Sohail, Arun K Pati, Vijeth Aradhya, Indranil Chakrabarty
  • Full version available at arXiv:2302.11499
• Matching Triangles and Triangle Collection: Hardness based on a Weak Quantum Conjecture with Andris Ambainis, Harry Buhrman, Koen Leijnse, Florian Speelman
  • Full version available at arXiv:2207.11068
• Memory Compression using Quantum Random-Access Gates with Harry Buhrman, Bruno Loff, Florian Speelman
  • Published in proceedings of the 17th Theory of Quantum Computation, Communication, and Cryptography (TQC 2022)
  • Full version available at arXiv:2203.05599
• Improved Quantum Query Upper Bounds Based on Classical Decision Trees with Arjan Cornelissen and Nikhil S. Mande
  • Presented at the non-proceedings track of Theory of Quantum Computation, Communication, and Cryptography (TQC 2022)
  • Published in proceedings of the 42nd IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2022)
  • Full version available at arXiv:2203.02968
• Limits of quantum speed-ups for computational geometry and other problems: Fine-Grained Complexity via Quantum Walks with Harry Buhrman, Bruno Loff, Florian Speelman
  • Presented at the 25th Annual Conference on Quantum Information Processing (QIP 2022)
  • Published in proceedings of the 13th Innovations in Theoretical Computer Science Conference (ITCS 2022)
  • Presented at the non-proceedings track of Theory of Quantum Computation, Communication, and Cryptography (TQC 2021)
  • Full version available at arXiv:2106.02005
• A Framework of Quantum Strong Exponential-Time Hypotheses with Harry Buhrman and Florian Speelman
  • Published in proceedings of the 38th International Symposium on Theoretical Aspects of Computer Science (STACS 2021)
  • Presented at the non-proceedings track of Theory of Quantum Computation, Communication, and Cryptography (TQC 2020)
  • Full version available at arXiv:1911.05686
• Impossibility of cloning of quantum coherence with Dhrumil Patel, Chiranjeevi Vanarasa, Indranil Chakrabarty, and Arun Kumar Pati
  • Published in journal of Physical Review A 103, 022422
  • Full version available at arXiv:1806.05706
• Non-negativity of conditional von Neumann entropy and global unitary operations with Indranil Chakrabarty and Nirman Ganguly
  • Published in journal of Physical Review A 96, 062102
  • Full version available at arXiv:1703.01059
• An overview of quantum algorithms: From quantum supremacy to shor factorization with Alvaro Piedrafita
  • Published in IEEE International Symposium on Circuits and Systems (ISCAS 2020)

Talks and Poster Presentations

• Quantum Fine-Grained Complexity
  • Invited talk at Fine-Grained Cryptography Workshop at FSTTCS 2022
  • Invited (virtual) talk at Quantum Innovators Workshop IQC 2022
• Improved Quantum Query Upper Bounds Based on Classical Decision Trees
  • At FSTTCS on December 20, 2022
• Matching Triangles and Triangle Collection: Hardness based on a Weak Quantum Conjecture
  • Invited talk at Hon-Hai Research Institute on October 7, 2022
• Memory Compression with Quantum Random-Access Gates
  • Invited talk at IIIT-Hyderabad, India on August 4, 2022
  • At TQC in July 2022
  • Invited (virtual) talk at Stanford University on May 26, 2022
  • Invited talk at IRIF, Paris in April 2022 (youtube video)
• Fine-Grained Complexity via Quantum Walks
  • At QIP on March 11, 2022
  • At ITCS on January 31, 2022 (youtube video)
  • At TQC on June 29, 2021 (youtube video)
  • Invited (virtual) talk at IRIF, Paris on June 24, 2021 (youtube video)
  • Invited (virtual) talk at NUS, Singapore on August 30, 2021
  • Invited (virtual) talk at University of Bristol on November 10, 2021
• A Framework of Quantum Strong Exponential-Time Hypotheses
  • At TQC on June 12, 2020 (youtube video)
  • At STACS on March 9, 2021 (youtube video)
  • Poster presentation at QIP (pdf)
  • Invited (virtual) talk at CQT, Singapore on February 2, 2021 (youtube video)
  • Invited (virtual) talk at QuSoft, CWI on Dec 21, 2020 (youtube video)
  • Invited talk at IIIT-Hyderabad, India on January 7, 2020
• Quantum Fine-Grained Complexity (in layperson’s terms) at the Scientific Meeting of CWI (link to the video)
• Quantum Walks and its Applications at IIIT Hyderabad, India on October 24, 2020 (youtube video)
• Non-Negativity of Conditional von Neumann Entropy and Global Unitary Operations at QuSoft, CWI (November 2, 2018)

Education

• PhD in Quantum Computing at University of Amsterdam (October 2018 – December 2022)
  Supervisors: Harry Buhrman and Florian Speelman
  PhD thesis: Quantum Fine-Grained Complexity
  Defence ceremony: link to the video
• MS by Research in Computer Science at International Institute of Information Technology Hyderabad, India (2015 – 2018)
  Supervisors: Indranil Chakrabarty and Kannan Srinathan
  Masters thesis: A few limits to Quantum Information Theory
• BTech in Computer Science at International Institute of Information Technology Hyderabad, India (2006 – 2010)
  

Teaching, Supervising and other Work Experiences

• Co-supervised Masters project of Koen Leijnse (2022)
  Role: Co-superviser
  
• Co-supervised Bachelors project of Daan Schoneveld (2022)
  Role: Co-superviser
  
• Introduction to Quantum Computing at University of Amsterdam (2019)
  Role: Teaching Assistant
  
• Discrete Mathematics and Linear Algebra at IIIT Hyderabad, India (2016 – 2018)
  Role: Teaching Assistant
  
• Microsoft IDC (2012 – 2015)
  Role: Build Engineer
• System Center - Virtual Machine Manager Team: Responsibilities included Functional Testing and Unit Test Automation
• WinSE Build and Packaging Team: Responsibilities included maintaining and optimizing the build and packaging automation for the updates to be shipped for Windows operating systems like Vista, Win7
• C Programming and Data Structures at KIIT University, India (2010 – 2011)
  Role: Lecturer
  

Awards and Recognitions

• Received Pat-On-The-Back award from Microsoft IDC in the first year of joining
• Secured an all India rank of 1301 in AIEEE’06 exam, an entrance test taken by about eight hundred thousand students all over the country
• Qualified State Level Maths Olympiad in Grade 11, 2004, secured an all India rank of 42 in National Cyber Olympiad in Grade 10, 2003

Other professional services

• Part of the WIQD organizing committee (January – October 2021)
• Subreviewer for FOCS, STOC, MFCS, QIP, ITCS, TQC, ICALP, SOFSEM
• Co-organizer for QuSoft seminars from (2019 – 2021)