About

I am a postdoctoral researcher at the Institute for Quantum Computing, working with Michele Mosca on theoretical aspects of quantum computation. I am also working on quantum risk assessment at evolutionQ Inc.

I graduated from Carnegie Mellon University with a PhD in Theoretical Physics. My advisor was Robert B. Griffiths.

Curriculum Vitae as of May 2017

"Try not to become a man of success,
but rather try to become a man of value"
–Albert Einstein

Contact

Institute for Quantum Computing (IQC) at the University of Waterloo
200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
Office: IQC-QNC 3112
Email: vgheorgh AT gmail DOT com
Twitter: @vlad_hbar
PGP Public Key (4096 bit)

Research

I am interested in fault-tolerant quantum processing, quantum architectures, quantum communication, quantum and classical cryptography and classical/quantum separation.

I am a referee for: Nature, Physical Review Letters, New Journal of Physics, Physical Review A, Quantum Information Processing, Quantum Information and Computation, Quantum Science and Technology, Physics Letters A, International Journal of Quantum Information, Optics Communications, IEEE Security & Privacy.

Work in progress

• Quantum software, quantum architectures
• Fault tolerance for higher dimensional systems
• Quantum resource estimation for cryptographic algorithms
• Classical/quantum separation, correlation measures

Publications

arXiv feed, Google Scholar citations

1. Jacob Marks, Tomas Jochym-O'Connor and Vlad Gheorghiu, "Comparison of fault-tolerant thresholds for planar qudit geometries", arXiv:1701.02335 [quant-ph] (2017).


2. Matthew Amy, Olivia Di Matteo, Vlad Gheorghiu, Michele Mosca, Alex Parent and John Schanck, "Estimating the cost of generic quantum pre-image attacks on SHA-2 and SHA-3", Cryptology ePrint Archive: Report 2016/992, arXiv:1603.09383 [quant-ph] (2016), accepted as a hot-topic contribution to PQCrypto 2016 (Fukoaka, Japan), invited talk at the Quantum Computer Science Workshop 2016 (Banff AB, Canada), video available here. To appear in the proceedings of Selected Areas in Cryptography (SAC) 2016, St. John's, Newfoundland, Canada.


3. Vlad Gheorghiu, Marcos C. de Oliveira and Barry C. Sanders, "Nonzero Classical Discord", arXiv:1407.5507 [quant-ph], Phys. Rev. Lett. 115, 030403 (2015).


4. Srinivasan Arunachalam, Vlad Gheorghiu, Tomas Jochym-O'Connor, Michele Mosca and Priyaa Varshinee Srinivasan, "On the Robustness of Bucket Brigade Quantum RAM", arXiv:1502.03450 [quant-ph] (2015), New Journal of Physics 17, 123010 (2015), contributed talk in the proceedings of the TQC 2015 (Bruxelles, Belgium) contributed talk AQIS 2015 (Seoul, South Korea).


5. Vlad Gheorghiu, "Quantum++ - A C++11 Quantum Computing Library", arXiv:1412.4704 [quant-ph] (2014), contributed talk at the Quantum Programming and Circuits Workshop, June 8-11, 2015, IQC, University of Waterloo, Canada, invited talk at the Quantum Computer Science Workshop 2016 (Banff AB, Canada), video available here.


6. Vlad Gheorghiu, "Standard Form of Qudit Stabilizer Groups", arXiv:1101.1519 [quant-ph], Phys. Lett. A 378, 505-509 (2014).


7. German Luna, Samuel Reid, Bianca De Sanctis and Vlad Gheorghiu, "A Combinatorial Approach to Quantum Error Correcting Codes", arXiv:1304.6743 [math], Discrete Mathematics, Algorithms and Applications, vol. 6, 1450054 (2014).


8. Vlad Gheorghiu and Barry C. Sanders, "Accessing Quantum Secrets via Local Operations and Classical Communication", arXiv:1305.0805 [quant-ph], Phys. Rev. A 88, 022340 (2013).


9. Shmuel Friedland, Vlad Gheorghiu and Gilad Gour, "Universal Uncertainty Relations", arXiv:1304.6351 [quant-ph], Phys. Rev. Lett. 111, 230401 (2013). QCrypt 2013 conference talk recorded on YouTube.


10. Patrick J. Coles, Vlad Gheorghiu and Robert B. Griffiths, "Consistent Histories for Tunneling Molecules Subject to Collisional Decoherence", arXiv:1205.6188 [quant-ph], Phys. Rev. A 86, 042111 (2012).


11. Vlad Gheorghiu and Gilad Gour, "Multipartite Entanglement Evolution Under Separable Operations", arXiv:1205.2667 [quant-ph], Phys. Rev. A 86, 050302 (Rapid Communications) (2012).


12. Vlad Gheorghiu, "Generalized Semiquantum Secret-Sharing Schemes", arXiv:1204.1072 [quant-ph], Phys. Rev. A 85, 052309 (2012).


13. Patrick J. Coles, Li Yu, Vlad Gheorghiu and Robert B. Griffiths, "Information Theoretic Treatment of Tripartite Systems and Quantum Channels", arXiv:1006.4859 [quant-ph], Phys. Rev. A 83, 062338 (2011).


14. Vlad Gheorghiu, "Separable Operations, Graph Codes and the Location of Quantum Information", Carnegie Mellon University PhD Thesis, arXiv:1006.4888 [quant-ph] (2010).


15. Vlad Gheorghiu, Li Yu and Scott M. Cohen, "Local Cloning of Entangled States", arXiv:1004.5126 [quant-ph], Phys. Rev. A 82, 022313 (2010).


16. Vlad Gheorghiu and Shiang Yong Looi, "Construction of Equally Entangled Bases in Arbitrary Dimensions via Quadratic Gauss Sums and Graph States", arXiv:1004.1633 [quant-ph], Phys. Rev. A 81, 062341 (2010).


17. Vlad Gheorghiu, Shiang Yong Looi and Robert B. Griffiths, "Location of Quantum Information in Additive Graph Codes", arXiv:0912.2017 [quant-ph], Phys. Rev. A 81, 032326 (2010).


18. Shiang Yong Looi, Li Yi, Vlad Gheorghiu and Robert B. Griffiths, "Quantum Error Correcting Codes Using Qudit Graphs States", arXiv:0712.1979 [quant-ph], Phys. Rev. A 78, 042303 (2008).


19. Vlad Gheorghiu and Robert B. Griffiths, "Separable Operations on Pure States", arXiv:0807.2360 [quant-ph], Phys. Rev. A 78, 020304 (Rapid Communications) (2008).


20. Vlad Gheorghiu and Robert B. Griffiths, "Entanglement Transformations Using Separable Operations", arXiv:0705.0369 [quant-ph], Phys. Rev. A 76, 032310 (2007).

Software

My personal GitHub repositories
The Quantum Software group at IQC

Below is a list of software products that I wrote:

• Quantum++
  – A modern C++11 general purpose quantum computing library, composed solely of template header files. It uses the Eigen 3 linear algebra library and, if available, the OpenMP multi-processing library. Status: active, version 1.0-rc1 relased on 11 November 2016 under the GNU Public License.


• Design patterns
  – My take on design patterns in modern C++ (C++11/C++14).


• pytexnumber
  – A Python 2/3 console program for renumbering latex references (labels).
  • Usage:
    • python3 py3texnumber.py - for the Python 3 version.
    • python py2texnumber.py - for the Python 2 version.
  
  
  • Description: replaces all labels in <in.tex> that match a given input <pattern>, such as \label{<pattern>...} and all corresponding references (\ref, \eqref, \pageref) with renumbered ones <replacement>idx, where idx counts the matching \label{<pattern>...} order of appearance, i.e. equals 1 for the first \label that matches the input pattern, 2 for the second etc. The file <in.tex> is left unchanged and the modifications are written to <out.tex>.
  
  
  • Example: consider a latex file <source.tex> having three labels, named, in order of appearance, \label{eqn5}, \label{eqn_important} and lastly \label{entropy}. Then the command
    • python3 py3texnumber.py in.tex out.tex eqn Eqn
    replaces \label{eqn5} by \label{Eqn1} (and also all references to eqn5 automatically become references to Eqn1) and replace \label{eqn_important} by \label{Eqn2} (again together with the corresponding references). The \label{entropy} remains unchanged since it does not match the input pattern \label{eqn...}. The results are saved to the file <out.tex>.


• cpptexnumber
  – The C++11 version of pytexnumber above. A C++98 version is also available.
  • Usage: same as pytexnumber above.


• GTexnumber
  – A GUI Java program for renumbering latex references (labels). The Java sources are included in the .jar files. The Netbeans project is located here.
  • Description: same as pytexnumber above, except that the user's input is performed through the graphical interface.
  
  
  • Usage: Unzip the archive then run the program with
    • java -jar GTexnumber.jar


• Texnumber
  – A console Java program for renumbering latex references (labels). The Java sources are included in the .jar files. The Netbeans project is located here.
  • Description: same as pytexnumber above.
  
  
  • Usage: Unzip the archive then run the program with
    • java -jar Texnumber.jar

Find me on Stackoverflow

Last modified: May 2017.
Visited for times since July 2010.