Monash Quantum Information Science


to the Monash Quantum Information Science (MonQIS) group page. Nature is a tough adversary. For instance, 25 Australians are bitten by monkeys every day [citation needed]. We do our best to put up a fight against the harsh reality that is life. In particular, we characterise the odd behaviour Nature throws at us and try to correct it. In some cases, we show what is sensible to say and what is hard to say about how nature behaves. We work in several different areas and use a variety of tools; each is discussed in some detail on this website. If you'd like to visit, join, or get involved in any capacity shoot us an email. We promise not to bite.

Here we are at Wilson's Promontory in October 2017.


June 19, 2019: Completely-positive divisibility does not mean Markovianity: Our paper has been accepted for publication on Physical Review Letters.

May 2019: Congratulations to Phil, who is now a Master's Alumnus.

April 23, 2019: Our paper on the emergence and typicality of Markovian quantum processes can now be consulted on Quantum.

April 9, 2019: Second publication in one day! Our paper on the structure of quantum stochastic process with finite memory is now available on Phys. Rev.A!

April 9, 2019: The Quantum Markov Order is now published on Physical Review Letters!

March 14, 2019: Congratulations to Philip, who has submitted his master thesis, and will be leaving the MonQIS soon.

March 10, 2019: We wish all the best to Joshua, who is leaving the MonQIS, to start is PhD in Vienna.

Feb 2019: We'd like to welcome Magdalini and Taylor, our new Honours Students, to the MonQIS.

Feb 25, 2019: Simon has officially submitted his PhD thesis, to become the first MonQIS postgraduate alumnus!

Feb 22, 2019: This is a new and extended version of our geometric quantum speed limit for arbitrary open dynamics, with a discussion of its robustness under CPTP maps.

Feb 21, 2019: IBM Q Experience provides a quantum computer to the general public on the cloud. As any computer, it needs error correction to perform long tasks. But how well are these errors modelled by IBM? We discuss in our preprint.

Feb 1, 2019: In this preprint we show how to efficiently simulate a non-Markovian quantum process, exploiting the tensor-network structure of the process tensor.

Jan 16, 2019: Does CP divisibility mean Markovianity? Read [the title of] our paper to find out!

Oct 25, 2018: We are happy to welcome Roberto, our new PhD student, to the MonQIS!

Sept 26, 2018: In this preprint we study the structure of quantum stochastic processes characterised by a finite memory length.

Sept 14, 2018: Check out our paper on stochastic quantum trajectories on NJP. We show how coherently controlled trajectories can turn non-Markovianity into a resource.

July 11, 2018: Master equations are an incredibly powerful tool to model both Markovian and non-Markovian dynamics of quantum systems. In our publication on Quantum we show how they can be tomographically reconstructed using the process tensor formalism.

July 5, 2018: Our paper on reconstruction of non-Markovian quantum dynamics with limited control has been published on Phys. Rev. A.

June 29, 2018: We are happy to welcome our new PhD student Graeme!

June 22, 2018: Here we have extended our geometric quantum speed limit to arbitrary open dynamics.

June 1, 2018: Our paper on efficient estimation of quantum frequency has been published on NJP.

May 29, 2018: How can we classify the memory-length of quantum processes? In this preprint we extend the notion of Markov order to open quantum processes, with rich landscape for future studies.

May 17, 2018: Mathias is leaving the MonQIS, after six months of hard work on tensor network formalism for process tensor simulation. We wish him all the best! Stay tuned for news on his work.

May 15, 2018: We have released a review on quantum batteries. It will be a chapter of a book on the advancements in the field of Quantum Thermodynamics.

May 10, 2018: Our paper on the emergence of fluctuation relations for heat in non-equilibrium Landauer processes has been published on Phys. Rev. E

April 26, 2018: Fond of Renyi entropies? In this new preprint they take a central role in the study of quantum work statistic and resource theories.

March 1, 2018: Don't bother learning all that complicated non-Markovian formalism; in our new preprint we prove that typical processes are almost always almost Markovian.

February 13, 2018: Our Spin-chain model of a many-body quantum battery is published in Phys. Rev. A.

February 9, 2018: A new preprint showing how quantum control can be thought of as the coherent combination of stochastic trajectories.

February 9, 2018: Francesco's paper on Tightening Quantum Speed Limits for Almost All States is published in Phys. Rev. Lett..

January 25, 2018: Our work on characterising quantum stochastic processes and non-Markovianity has finally been published in Phys. Rev. Lett. and Phys. Rev. A.

January 4, 2018: Kavan's work on Quantum plug n' play: modular computation in the quantum regime is published in New Journal of Physics.

December 29, 2017: Our framework for describing quantum stochastic process is accepted for publication in Phys. Rev. A

December 27, 2017: Our unambiguous definition for quantum Markov processes, and an operational measure for non-Markovianity is accepted for publication in Phys. Rev. Lett.

December 21, 2017: Two new preprints on noisy quantum metrology; one led by our friends from Nottingham and the other led by Monash.

December 10, 2017: A new preprint on a Spin-chain model of a many-body quantum battery.

December 7, 2017: A new preprint proving a Kolmogorov extension theorem for general (quantum) stochastic processes.

November 11, 2017: A new preprint showing an unexpected relationship between Entanglement, non-Markovianity, and causal non-separability.

November 5, 2017: We received an internal grant to build a Network of Excellence, which will bring together Monash academics with international experts to study causation, consciousness and intelligence. Along with Kavan, the other Monash investigators are Tim Bayne, Nao Tsuchiya, and Jakob Hohwy. The external partners are David Chalmers, Karl Friston, Mile Gu, and Giulio Tononi.

October 9, 2017: The MonQIS retreat at Wilson's Promontory was a great success! (No one died.)

September 26, 2017: Quantum traffic wardens will be pleased to hear that we have significantly tightened quantum speed limits in our new preprint.

August 13, 2017: Mathias Jørgensen, a Masters student at DTU in Copehagen, is joining us for a year – welcome!

August 2, 2017: When people try to explain open quantum dynamics to you, do you feel lost in a sea of physically unmotivated definitions? Fear not, our new preprint explains open dynamics in a rigourous and operationally grounded way.

June 25, 2017: Thanks to our new article, we now know that interference falls just like everything else.

May 25, 2017: Choudry Shuaib has joined the group to study for his PhD – welcome!

April 20, 2017: In our new preprint, we reveal the connection between operationally accessible dynamical maps and continuous time memory kernels. We also provide a new way to exactly simulate dynamical steady states for open systems.

April 12, 2017: Quantum batteries continue to be a hot topic – our paper was just published in PRL (and featured in Physics)!

March 31, 2017: Pedro Figueroa-Romero has joined the group to study for his PhD – welcome!

March 13, 2017: After a stint in the real world, Phil Taranto has rejoined the group as a Masters student – welcome back!

February 27, 2017: Josh Morris rejoins the group for his Honours project – welcome back!

February 10, 2017: Thao is now an official MonQIS veteran, having completed her Masters degree. Congratulations!

January 4, 2017: Our work on temporal nonlocality has just been published in J. Phys. A!

December 15, 2016: Quantum batteries strike again, this time with constrained interactions.

November 11, 2016: Kavan has been awarded an ARC Future Fellowship!

October 7, 2016: Have you ever wanted to characterise a non-Markovian process, but were worried that you only had limited control over your system? Your solution can be found in our new preprint.

May 7, 2016: Francesco Campaioli joins the group. Welcome!

May 3, 2016 Power of one qumode for quantum computation published Physical Review A.

April 20, 2016 Power of one bit of quantum information in quantum metrology published in Physical Review A as a Rapid Communications.

April 13, 2016 Experimental realisation of the Landauer principle at the quantum level published in the Proceedings of Royal Society A.

February 3, 2016 Experimental proposal to implement the power of one bit of quantum information in quantum metrology published in Physical Review A and highlighted by Editors.

January 11, 2016 Thermodynamics of expanding universe published in Classical and Quantum Gravity.

November 10, 2015 Entropy production in presence of initial correlations published in Physical Review A.

October 30, 2015: Simon Milz joins the group. Welcome!

September 26, 2015: Royal Society travel grant for the next two years was jointly awarded to us and Gerardo Adesso's group.

July 30, 2015: We are looking for a PhD student to work on quantum thermodynamics! See our advertisement and email us.

July 23, 2015: Quantum batteries are a thing now, just published in NJP. This work was noted and covered by, , and CQT.

July 17, 2015: A new idea of using a two-level probe to study complex systems is on arXiv.

June 5, 2015: A detailed study on entanglement distribution is on arXiv.

May 22, 2015: Monash-Warwick seed grant awarded with Animesh Datta leading the Warwick end.

May 6, 2015: Felix talks about using the quantum Zeno effect to probe complex systems. Check it out on YouTube.

April 9, 2015: Metrology at the boundary of quantum-classical boundary arXiv.

March 24, 2015: Quantum batteries are on arXiv arXiv.

February 27, 2015: Thao Le, Patric Orlando, and Philip Taranto rejoin the group as Honours students.

January 8, 2015: Website goes live after one year at Monash.