### About Me

I am a permanent researcher at Inria. I am part of the MOCQUA team located at LORIA in Nancy, France.

My research interests are in quantum and probabilistic programming languages, categorical quantum mechanics, string diagrams and category theory.

I am originally from Sofia, Bulgaria, where I was born and raised. I can speak English (fluent), Bulgarian (native) and a bit of French.

### Employment

Permanent researcher in the MOCQUA team at Inria/LORIA.

Quantum programming languages.

Principal Investigator: Simon Perdrix.

Supported by the ANR/SoftQPRO and PIA-GDN/Quantex grants.

Circuit description languages for quantum programming.

Principal Investigator: Michael Mislove.

Supported by the MURI grant Semantics, Formal Reasoning, and Tools For Quantum Programming.

### Education

#### University of Oxford

**PhD Computer Science**

2012 - 2016

Thesis: Rewriting Context-free Families of String Diagrams.

Supervisors: Samson Abramsky, Bob Coecke and Aleks Kissinger.

Examiners: Sam Staton (internal), Reiko Heckel (external).

#### University of Oxford

**MSc Computer Science (Distinction)**

2011 - 2012

Thesis: An Abstract Approach towards Quantum Secret Sharing.

Supervisor: Bob Coecke.

#### Jacobs University Bremen

**BSc Mathematics; BSc Computer Science**

2008 - 2011

Prior to that, I studied at the Sofia High School of Mathematics in Sofia, Bulgaria.

### Papers

*Central Submonads and Notions of Computation*, with Titouan Carette and Louis Lemonnier.

**Preprint**. [arxiv | hal]*Quantum Expectation Transformers for Cost Analysis*, with Martin Avanzini, Georg Moser, Romain Péchoux and Simon Perdrix.

**LICS 2022 (Logic in Computer Science),**to appear. [hal | arxiv]*Semantics for Variational Quantum Programming*, with Xiaodong Jia, Andre Kornell, Bert Lindenhovius and Michael Mislove.

**POPL 2022 (Principles of Programming Languages).**[doi | arxiv]*Qimaera: Type-safe (Variational) Quantum Programming in Idris*, with Liliane-Joy Dandy and Emmanuel Jeandel.

**Preprint.**[arxiv | software]*Commutative Monads for Probabilistic Programming Languages,*with Xiaodong Jia, Bert Lindenhovius and Michael Mislove.

**Submitted.**Extended version of our LICS 2021 paper. [pdf]*The Central Valuations Monad,*with Xiaodong Jia and Michael Mislove.

**CALCO 2021 (Conference on Algebra and Coalgebra in Computer Science ).**Early Ideas Track. [doi | arxiv ]*Commutative Monads for Probabilistic Programming Languages,*with Xiaodong Jia, Bert Lindenhovius and Michael Mislove.

**LICS 2021 (Logic in Computer Science).**[doi | arxiv]*Quantum Programming with Inductive Datatypes,*with Romain Péchoux, Simon Perdrix and Mathys Rennela.

**Submitted**. Extended version of our FoSSaCS 2020 paper. [pdf]*Semantics for a Lambda Calculus for String Diagrams,*with Bert Lindenhovius and Michael Mislove.

**Outstanding Contributions to Logic (Volume for Samson Abramsky)**, to appear. [pdf]*Computational Adequacy for Substructural Lambda Calculi*.

**ACT 2020 (Applied Category Theory)**. [doi = arxiv]*Semantics for first-order affine inductive data types via slice categories*.

**CMCS 2020 (Coalgebraic Methods in Computer Science)**. [doi | arxiv]*LNL-FPC: The Linear/Non-linear Fixpoint Calculus,*with Bert Lindenhovius and Michael Mislove.

**LMCS (Logical Methods in Computer Science)**. [doi | arxiv]*Quantum Programming with Inductive Datatypes: Causality and Affine Type Theory,*with Romain Péchoux, Simon Perdrix and Mathys Rennela.

**FoSSaCS 2020 (Foundations of Software Science and Computation Structures)**. [doi | arxiv]*Mixed Linear and Non-linear Recursive Types,*with Bert Lindenhovius and Michael Mislove.

**ICFP 2019 (International Conference on Functional Programming).**[doi | arxiv]*Reflecting Algebraically Compact Functors.*

**ACT 2019 (Applied Category Theory)**. [doi = arxiv]*Enriching a Linear/Non-linear Lambda Calculus: A Programming Language for String Diagrams,*with Bert Lindenhovius and Michael Mislove.

**LICS 2018 (Logic in Computer Science).**[doi | arxiv]*A Framework for Rewriting Families of String Diagrams.*

**TERMGRAPH 2018 (Computing with Terms and Graphs).**[doi = arxiv]*Rewriting Context-free Families of String Diagrams.*

**PhD Thesis (University of Oxford, 2016).**[arxiv]*Quantomatic: A Proof Assistant for Diagrammatic Reasoning,*with Aleks Kissinger.

**CADE 2015 (Conference on Automated Deduction).**[doi | arxiv]*Equational Reasoning with Context-Free Families of String Diagrams,*with Aleks Kissinger.

**ICGT 2015 (International Conference on Graph Transformation).**[doi | arxiv]*!-Graphs with Trivial Overlap are Context-Free,*with Aleks Kissinger.

**GaM 2015 (Graphs as Models).**[doi = arxiv]*The ZX-calculus is incomplete for quantum mechanics,*with Christian Schröder de Witt.

**QPL 2014 (Quantum Physics and Logic).**[doi = arxiv]*An Abstract Approach towards Quantum Secret Sharing.*

**MSc Thesis (University of Oxford, 2012).**[pdf]*MathML-aware Article Conversion from LaTeX,*with Heinrich Stamerjohanns, Deyan Ginev, Catalin David, Dimitar Misev and Michael Kohlhase.

**DML 2009 (Towards a Digital Mathematics Library).**[published version]

### Special Interest Groups

- Member of the IFIP TC1/TC2 Working Group on
*Foundations of Quantum Computation*(under creation).

### Program Committees

- QPL 2022. PC member for the international conference on Quantum Physics and Logic in 2022.
- ACT 2022. PC member for the international conference on Applied Category Theory in 2022.
- PlanQC 2022. PC member for the international workshop on Programming Languages for Quantum Computing in 2022.
- WADT 2022. PC member for the international Workshop on Algebraic Development Techniques in 2022.
- ACT 2021. PC member for the international conference on Applied Category Theory in 2021.
- QPL 2021. PC member for the international conference on Quantum Physics and Logic in 2021.
- PlanQC 2021. PC member for the international workshop on Programming Languages for Quantum Computing in 2021.

### Organisation

### Supervision

- Hugo Massonnat. Research internship on quantum programming (March – July 2022).
- Liliane-Joy Dandy. Research internship on quantum programming (March – July 2021).
**“Research Internship Prize”**at École Polytechnique. Paper:*Qimaera: Type-safe (Variational) Quantum Programming in Idris*, with Liliane-Joy Dandy and Emmanuel Jeandel.**Preprint.**[pdf | software]

### Research Visits

- Lorentz Center (Leiden, The Netherlands). Logic and Structure in Computer Science and Beyond (9.12.2019 - 13.12.2019).
- Schloss Dagstuhl – Leibniz Center for Informatics (Wadern, Germany). Quantum Programming Languages (16.09.2018 – 21.09.2018).
- Lorentz Center (Leiden, The Netherlands). Logical Aspects of Quantum Information (30.07.2018 - 3.08.2018).
- Simons Institute for the Theory of Computing (UC Berkeley). Logical Structures in Computation (17.11.2016 - 16.12.2016).

### Reviewing

## Conferences:

**CSL 2021** (Computer Science Logic), **QIP 2020** (Quantim Information Processing), **FoSSaCS 2020** (Foundations of Software Science and Computation Structures), **LICS 2018/2019(x3)/2020(x3)/2021** (Logic in Computer Science), **MFCS 2017/2021** (Mathematical Foundations of Computer Science), **ESOP 2022** (European Symposium on Programming).

## Journals:

**LMCS** (Logical Methods in Computer Science), **TOPLAS** (ACM Transactions on Programming Languages and Systems), **ACS** (Applied Categorical Structures), **TQC** (ACM Transactions on Quantum Computing), **Quantum**.

## Series

**Outstanding Contributions to Logic (Volume for Samson Abramsky)**.

### Software

- Qimaera: Idris libraries for type safe (variational) quantum programming.
- When I was a PhD student at Oxford, I was one of the developers of Quantomatic, which is a diagrammatic proof assistant with primary application in quantum information processing.

### Teaching

**Quantum Computing.**Lecturer, Université de Lorraine. Winter 2021, Winter 2022.**Programming in Haskell.**Lecturer, Université de Lorraine. Winter 2021.**Discrete Mathematics.**Lecturer, Tulane University. Spring 2017. [Course Website]**Categorical Quantum Mechanics.**Teaching Assistant, University of Oxford. Spring 2014, Spring 2015.**Categories, Proofs and Processes.**Teaching Assistant, University of Oxford. Fall 2014.**Quantum Computer Science.**Teaching Assistant, University of Oxford. Fall 2013, Fall 2014.**Lambda Calculus and Types.**Teaching Assistant, University of Oxford. Spring 2014.**Operating Systems.**Teaching Assistant, Jacobs University Bremen. Spring 2011.**Formal Languages and Logic.**Teaching Assistant, Jacobs University Bremen. Fall 2010.**Computability and Complexity.**Teaching Assistant, Jacobs University Bremen. Spring 2010.

### Talks (Selection)

A selection of talks is presented below. The complete list of my talks is available here.

## Invited Talks (international conferences)

*Inductive and Recursive Types for Quantum Programming.***Joint special session of QPL 2020 (Quantum Physics and Logic) and MFPS 2020 (Mathematical Foundations of Programming Semantics) on Quantum Programming Languages.**June 2020. [video & slides]

## Invited Talks (international seminars, special events, etc.)

*Semantics for Variational Quantum Programming.***Logic, Quantum Computing, and Artificial Intelligence.**Virtual. 03.07.2021.*Recursive types for linear/non-linear quantum programming.***Dagstuhl Seminar on Quantum Programming Languages.**Wadern, Germany. 17.09.2018. [slides]*Baby’s First Diagrammatic Calculus for Quantum Information Processing.***Logical Aspects of Quantum Information.**Lorentz Center, Leiden, The Netherlands. 01.08.2018. [slides]*Programming String Diagrams.***Celebrating 10 years of the ZX-calculus.**University of Oxford. 10.05.2018.*Categorical models of circuit description languages.***Duskofest 2017.**Oxford, UK. 12.10.2017. [slides]*Rewriting Families of Quantum Circuits.***Logic Lounge.**Simons Institute (UC Berkeley, USA). 17.11.2016.*Quantomatic – current state and case study.***Celebrating 10 Years of Categorical Quantum Mechanics.**Oxford, UK. 17.10.2014. [slides]

## Invited Talks (group seminars)

*Semantics for first-order affine inductive data types via slice categories.***Invited Seminar Talk.**Concurrent Games Cafe. [slides]*Quantum Programming with Inductive Datatypes: Causality and Affine Type Theory.***Invited Seminar Talk.**LRI, Saclay, France. 07.02.2020. [slides]*Quantum Programming with Inductive Datatypes: Causality and Affine Type Theory.***Invited Seminar Talk.**IRIF, Paris, France. 26.11.2019. [slides]*Equational reasoning with context-free families of string diagrams.***Invited Seminar Talk.**Radboud University, Nijmegen, The Netherlands. 02.12.2015.

## Invited Talks (broad audience)

*Security in a Quantum World.***NOLASEC.**New Orleans, USA. 07.11.2017. [slides]*Quantum Computing: the Good, the Bad and the (not so) Ugly.***Oriel Talks.**Oriel College (University of Oxford). 07.06.2016. [slides]*Higher-order rewriting of Quantum Circuits.***CantaBulgarian Conference.**Oxford and Cambridge Club (London, UK). 13.03.2016. [slides]

## Contributed Talks (with no formal proceedings)

*Commutative Monads for Probability in Domain Theory.***Logic of Probabilistic Programming.**CIRM, Marseille, France, 04.02.2022. [website]*Quantum Programming with Inductive Datatypes: Causality and Affine Type Theory.***ACT 2019.**University of Oxford. 19.07.2019. [slides]*Mixed Linear and Non-linear Recursive Types.***ACT 2019.**University of Oxford. 19.07.2019. [slides]*Quantum Programming with Inductive Datatypes: Causality and Affine Type Theory.***CALCO 2019.**University College London. 04.06.2019. [slides]*Enriching a Linear/Non-linear Lambda Calculus: A Programming Language for String Diagrams.***QPL 2018.**Halifax, Canada. 07.06.2018. [slides]*Rewriting Families of String Diagrams.***String 2017.**Oxford. 09.09.2017. [slides]*Grammar transformation with DPO rewriting.***GaM 2016.**Technische Universiteit Eindhoven. 02.04.2016. [slides]

### Awards

- Scatcherd Scholarship for the maxium duration of 3 years (fully-funded scholarship awarded to 9 European graduate students at University of Oxford).
- MSc degree awarded with distinction for high academic performance.
- Member of the President’s List for academic achievement for all three academic years at Jacobs University Bremen.