• 15/05/2017: Our paper on A solid-state single-photon filter appeared today in Nature Nanotechnology. Go have a look at the beautiful data: and the record nonlinearity threshold of 0.3 ± 0.1 incident photons! Many congratulations to the French team of Lorenzo, Carlos, Bogdan, Niccolo, Guillaume, Jean, Carmen, Aristide, Isabelle, Loïc, Alexia, and Pascale. When we next all meet, the first bottle of champagne is on me!
  • 26/04/2017: Kaumudibikash Goswami starts his PhD in the QT Lab today, joining us from the Indian Institute of Space Science and Technology. Welcome aboard Kaumudi, it's great to have you join us!
  • 11/04/2017: Our paper on Active demultiplexing of single photons from a solid-state source appeared today in Laser & Photonics Reviews. Many congratulations to Juan, Raphael, Marcelo, and Azwa; the French team of Isabelle, Aristide, and Pascale; and the Griffith team of Francesco, Ben, Sachin, Hoang-Phuong, Dzung, and Mirko. It was a great cross-river and cross-hemisphere collaboration!
  • 28/03/2017: Our paper on Boson Sampling with Single-Photon Fock States from a Bright Solid-State Source appeared today in Physical Review Letters. Many congratulations to Juan, Matthew, Marcelo, and the French team of Paul, Olivier, Isabelle, Aristide, and Pascale!
  • 14/03/2017: Congratulations to Martin and Juan—and their co-authors Farid and Tim—whose paper on Ultrafine Entanglement Witnessing appeared today in Physical Review Letters. It's an Editor's Suggestion, and has a Synopsis in Physics, Prepping an Entanglement Witness. Nice one!
  • 27/01/2017: Many, many, congratulations to our friends (and QT Lab alumni), Dr Juan Loredo and Dr Matthew Broome, who today were each awarded a Marie Skłodowska-Curie Fellowship, to work respectively with the inestimable Professors Pascale Senellart and Peter Lodahl, and their groups in France and Denmark. Nice one Juan and Matthew: what a wonderful start to the new year!







  • 13/12/2011: Congratulations to our long-time collaborator Sae Woo Nam who today was awarded the Department of Commerce Gold Medal, the highest honorary award granted by the Secretary of Commerce. A wonderful result and well deserved!
  • 14/11/2011: Many congratulations to Marcelo Almeida, who today was awarded an Australian Research Council Discovery Early Career Researcher Award: this is a fantastic result Marcelo and we're all excited and proud!
  • 07/09/2011: Well it's been quite a year for the intersection of quantum and pop culture. A paper this week in Science by our former PhD student, postdoc, and much missed colleague Ben Lanyon, was mentioned today in a tweet by Stephen Fry! Congratulations Ben on both the superb paper, and the call-out by Stephen Fry—is this the modern British equivalent of being recognised by royalty? ☺
  • 01/09/2011: There's a story today in New Scientist on a nice recent paper by Mariantoni and colleagues at UCSB, Quantum computer chips pass key milestones; it contains a few colour comments by Andrew (who in his defence, did so late at night his time!).
  • 13/07/2011: Our paper on Two-photon quantum walks in an elliptical direct-write waveguide array was published today in the New Journal of Physics in their Focus on Integrated Quantum Optics. It's the first collaborative paper between the experimental teams at UQ and Macquarie—congratulations to all!
  • 10/06/2011: Holy heck! Our long time friend and QT Lab collaborator, Aephraim Steinberg, made the big time today, with the BBC's Now Show including a custom-written song about his recent paper in Science!
  • 01/06/2011: There's a nice News Feature in Nature today, Quantum computing: The power of discord. It looks at recent work on quantum discord—a newish kind of quantum correlation—including our paper experimental paper from 2008. Definitely worth a read! One important correction: the opening line of the article makes it sound like I built our experiment, when of course the hard yards were done by Ben, Marco, and Marcelo—all congratulations are due to them!
  • 25/05/2011: Our collaborator Alán Aspuru-Guzik gives an interview at physicsworld.com, Quantum computers tackle chemistry and biology. Go check it out, it's only 4 minutes long and does a nice job of explaining why we find our work on quantum simulation so compelling!
  • 20/05/2011: A good day: our paper on Hardy’s Paradox and Violation of a State-Independent Bell Inequality in Time was also published today in Physical Review Letters. Congratulations to all, but particularly to Alessandro, two first-author papers in one day!
  • 20/05/2011: Our paper on Experimental information complementarity of two-qubit states was published today in the New Journal of Physics. Congratulations to all!
  • 05/05/2011: Andrew today was presented his 2010 Pawsey Medal by the Australian Academy of Science at Science at the Shine Dome 2011. It's been quite fun hearing talks from all branches of Science!
  • 04/05/2011: The Register has an article on our compressive sensing paper from March, Oz boffins in quantum computing breakthrough. The article has thoughtfully been labelled NSFMP, i.e. Not Safe For Maths-Phobics ® .
  • 11/04/2011: Andrew has been awarded a University of Queensland Vice-Chancellor's Senior Research Fellowship! A list of all the awardees can be found in this nice article on cleaning up mining waste using bugs.
  • 16/03/2011: Well this is interesting: according to a paper in the arXiv today, the best city in Australia for physics—by quite a ways it turns out—is Brisbane. The paper identifies which cities worldwide produce more excellent papers than can be expected. The idea is that:
    ...if excellent papers are defined as the top-10% most-highly cited papers in a field, on the basis of the null hypothesis a value of 10% of all papers published from a city would be expected as belonging to this category.
    The authors then calculate the standardized residual for every city in the world in 2008 that published a top-10% paper, using Z=(observed-expected)/√expected (Z=1 indicates the city is publishing the expected number of top-10 papers). They note—and I'm sure we all heartily agree!—that:
    From a policy perspective, it may pay off for the sciences within a country to identify (by these visualization methods) and expand regional centers of excellence (for example, with specific financial support). In our opinion, one should not subsidize size, but those centers should be fostered where the observed number of excellent papers exceeds the expected numbers.
    And the results for Australia in Physics? <drum-roll> Brisbane, Z=4.1; Adelaide, Z=3.1; Melbourne, Z=2.7; Sydney, Z=2.5, and Canberra, Z=1.4.
  • 08/03/2011: And TG Daily also has an article on our compressive sensing paper: Quantum engineers clear a roadblock in developing new technologies. I love the editorial at the end of this article:
    If you are a technology enthusiast you might find yourself interested enough to want to read it. You won’t be able to though because you have to have a subscription to read the journal. That may be a bummer but the future of academic journals is creative commons licenses. Scientific information like this will become more widely available to the public sooner rather than later.
  • 08/03/2011: In Germany, myScience also has an article on our compressive sensing paper: Quantum engineers remove roadblock in developing next-generation technologies. Despite the same title as the PhysOrg article, the text is different!
  • 08/03/2011: Quick as always, today's PhysOrg has an article on our compressive sensing paper: Quantum engineers remove roadblock in developing next-generation technologies.
  • 07/03/2011: Our paper on Efficient Measurement of Quantum Dynamics via Compressive Sensing was published today in Physical Review Letters. Click on the pretty graphic to go to the UQ press release:
    Congratulations everyone, and hopefully one day all the co-authors can meet in person, preferably over a nice meal!
  • 02/03/2011: Our paper on Matchgate quantum computing and non-local process analysis was highlighted today in the New Journal of Physics Best of 2010—“a special collection of papers that represents the breadth and excellence of the work published in the journal last year. The articles were selected for their presentation of outstanding new research, receipt of the highest praise from our international referees and the highest number of downloads last year.” Congratulations Sven, Alessandro and Aephraim, that's an outstanding result!
  • 31/01/2011: Our paper on Single-photon device requirements for operating linear optics quantum computing outside the post-selection basis was published online today in the Journal of Modern Optics. Particular congratulations to Thomas, and thanks to the Australian Research Council who made this possible by awarding Thomas a Linkage Fellowship.
  • 10/01/2011: Our paper on Violation of the Leggett–Garg inequality with weak measurements of photons was published online today in the Early Edition of the Proceedings of the National Academy of Sciences. Nice job everyone, and Mike, you're welcome back at any time!
  • 05/01/2011: Our paper on Engineered optical nonlinearity for a quantum light source was published in this month's Optics Express (but has an official publication date of December 20, 2010—do we count this as a 2010 or a 2011 paper?). Congratulations Aggie and Alessandro on what I'm sure will be the first of many fruitful collaborations!
  • 05/01/2011: Till's paper on Imaging of Trapped Ions with a Microfabricated Optic for Quantum Information Processing was published in this month's Physical Review Letters. Nice one Till!



  • 19/12/2009: Stop reading this and go read Scott Aaronson's blog post, Hopefully my last D-Wave post ever. Go on, you won't be sorry!
  • 16/12/2009: Alessandro's paper on Discrete Tunable Color Entanglement—done at the University of Vienna—was published today in Physical Review Letters. It's also been highlighted in a Physics Update in Physics Today. Nice one Alessandro!
  • 04/12/2009: The Australian Academy of Science have awarded Andrew the 2010 Pawsey Medal for outstanding research in physics. He's deeply humbled, and very thankful to all his past and current colleagues for the chance to work with them on some really wonderful science!
  • 02/12/2009: Andrew gave a Plenary today at the combined 2009 ACOLS and ACOFT conferences. It was lots of fun—hopefully the fibre-optic folk weren't too bored!
  • 30/11/2009: After nearly 4 years, Benjamin Lanyon is leaving us to join Rainer Blatt as a Postdoctoral Scientist in the Institut für Experimental Physik at Universität Innsbruck. The very best of British to you Ben! We're a little unsure how we'll cope with all the extra office space and silence ... so please come back soon! (And remember, we're holding your surfboard hostage).
  • 30/10/2009: Perimeter Institute has signed an agreement with the Universities of Queensland and Sydney, and Griffith University, to strengthen collaborative research in quantum foundations. Excellent, extra theorists to bother!
  • 28/10/2009: Our paper on Anti-symmetrisation reveals hidden entanglement was published today in the New Journal of Physics. It's also been selected for inclusion in IOP Select— that's twice in one month! Nice work Alessandro, Marco, and Thomas!
  • 20/10/2009: Ben Lanyon, or as I should now say, Doctor Ben Lanyon was awarded his PhD today. Many congratulations Ben, it is thoroughly well deserved!
  • 17/10/2009: Tonight is the Canadian premiere of The Quantum Tamers, a documentary sponsored by the Perimeter Institute that features a dozen or so quantum folk from around the world, including our very own Gerard Milburn and Andrew—who are both waiting to see the film with some trepidation! Update. It was both fun and good! Whew, now for some drinks...
  • 17/10/2009: For the Institute of Quantum Computing's open day, Andrew was part of a 6-person panel discussion on Quantum Information. A big thanks to Joseph Emerson for great moderation, film-clip DJ'ing and audience interaction.
  • 15/10/2009: As part of the Perimeter Institute's 10th anniversary celebrations, Andrew was one of a 7-person panel discussing "Quantum to Cosmos", at the Mike Lazaridis Theatre in Waterloo. It was recorded by TVO and webcast. A big thanks to Australia's own Wilson da Silva for MC'ing, although he could have spared Andrew the "Crocodile Dundee" reference!
  • 15/10/2009: Andrew was one of a 10-person panel discussing "The 10 Biggest Questions in Physics", at the Glenn Gould Theatre in Toronto. It was recorded by CBC's Quirks and Quarks—which, along with ABC's Science Show are the two longest-running science shows in at least the English-speaking world—and will be broadcast sometime in the New Year. A big thanks to Jim Handman and Bob McDonald who made the entire event a lot of fun!
  • 01/10/2009: Our article on Complementarity in variable strength quantum nondemolition measurements has been selected for inclusion in IOP Select! What does this mean? Well firstly it's very nice because articles are chosen by the editors, and secondly, for the next 365 days the article is free (as in beer), so go grab it now. Kudos to Marco and the team for writing such a good paper!
  • 25/09/2009: There's a nice article today in New Scientist on work by Netanel Lindner and Terry Rudolph (another UQ Alumnus!), Photon 'machine gun' could power quantum computers . A fun read, and not just because of the comments from Terry and Andrew. (Gosh, that didn' take long, it's been slash-dotted already).
  • 14/09/2009: Our paper on Complementarity in variable strength quantum non-demolition measurements was published today in the New Journal of Physics.
  • 04/09/2009: There's a nice article today in New Scientist on some work by Jeremy O'Brien (a QT Lab Alumnus! We should get T-shirts made), and his team at Bristol, where they have repeated our 2007 Shor's algorithm experiment, replacing the free-space circuitry with integrated-optics. There's comments from Jeremy—of course!—and also from Dan Browne and Andrew, who were authors on the two earlier Shor papers.
  • 28/08/2009: There's a great article today in The Quantum Times on Quantum information for chemistry and biology by Alán Aspuru-Guzik, which is a lovely intro—and I'm not just saying that because it briefly mentions our work!
  • 25/08/2009: Ross McKenzie has a blog entry on Andrew's talk today at the CQIQC III in Toronto, entertainingly titled James Bond meets Niels Bohr. Nice one Ross!
  • 23/06/2009: Ben is in the news again! The Australian has an article today Local scientists' quantum leap. (See comment below about this phrase...)
  • 18/06/2009: Ben Lanyon is the subject of a nice article today by Machines Like Us, "A quantum leap". (I've often wondered when people use this expression—do they realise it can refer to the smallest possible leap?). Look for the cool photo and the even cooler description of banging things!
  • 24/04/2009: Our collaborator Alán Aspuru-Guzik was interviewed today in the Nature blog, The Sceptical Chymist and discussed our recent work on quantum chemistry on a quantum computer. Cool!
  • 24/04/2009: Sven Ramelow, returns today to the University of Vienna, after a valiant research visit. It was lots of fun, Sven, and we hope you can come back soon!
  • 27/02/2009: Our paper on Parametric downconversion and optical quantum gates: two's company, four's a crowd was published today in the Journal of Modern Optics.
  • 07/02/2009: Well that went all too quickly. After a great visit, Prof. Aephraim Steinberg is returning to the University of Toronto—enjoy the spring weather Aephraim, and we'll have to get you back again soon!
  • 02/02/2009: The dead-tree version of our paper on Quantum computing using shortcuts through higher dimensions appeared today in Nature Physics.
  • 07/01/2009: Our paper on Experimentally generating and tuning robust entanglement between photonic qubits appeared today in the New Journal of Physics.
  • 01/01/2009: Sven Ramelow, from the University of Vienna, has started a three month research visit. Welcome Sven!



  • 19/12/2007: Happy Eid ul-Adha! Our paper on Experimental demonstration of Shor's algorithm with quantum entanglement appeared today in Physical Review Letters.
  • 15/12/2007: Despite what you may read, quantum computing will not enable anyone to transmit information faster than the speed of light. You can find an overview of our experiment and its possible implications at here.
  • 14/12/2007: ZDNet in Asia and Australia have an article our on Shor's experiment. Some corrections: it's more correct to say that the information needed to describe n entangled qubits grows exponentially, not the number of states; and we are funded in part by the Intelligence Advanced Research Projects Activity, IARPA, not by DARPA. It's easy to see how these things can get confused!
  • 14/12/2007: Cool! Our work our Shor's experiment made it into Neatorama!
  • 11/12/2007: Today's PhysOrg has a nice article on our Shor's experiment: Physicists perform the first ever quantum calculation.
  • 8/12/2007: There's a nice article by Davide Castelvecchi on our Shor's experiment in today's Science News.
  • 30/11/2007: An article has appeared in today's Innovations Report on our forthcoming Physical Review Letter on an Experimental demonstration of Shor's algorithm with quantum entanglement.
  • 17/10/2007: Happy International Dadaism month! Marco's paper on Effects of frequency correlation in linear optical entangling gate operated with independent photons appeared today in Physical Review A.
  • 30/09/2007: Well that just flew! After a 3 month visit, Dr Dr Thomas Jennewein is returning to the University of Vienna. See you next year Thomas!
  • 26/9/2007: Great news! Our Discovery Project on "Biomolecular optoelectronic materials and devices" has been funded by the Australian Research Council. Roll on cold black photon counters!
  • 18/9/2007: Gosh, more coverage! There's an article about our paper on Shor's algorithm in today's Brisbane Times, Sydney Morning Herald and The Age. As we say below, our experiment is interesting in that it demonstrates every stage of Shor's algorithm, particularly the entangling step. It is not scalable in itself, but there is a in- principle path to scalability which we and our colleagues are investigating to see if and when that's going to be feasible. As Ben Lanyon says "it was incredibly hard to do" ... so RSA Security don't need to worry just yet!
  • 14/9/2007: Despite the title of today's Ars Technica article, we'd just like to make it clear that we have never burnt through any graduate students, although we have on occasion fed them too much coffee. (Indeed, working in a dark lab we try not to let our researchers near bright light, get them wet, and most importantly, never feed them after midnight...)
  • 14/9/2007: The Register in the UK have a slightly breathless view of our Shor's paper. Our work does not pose a threat to current, everyday, cryptography, since the time scale for such quantum computation is closer to decades than months, and may not even be based on our research! It's just too early to tell for sure. You only need to worry about quantum computation today if you are prime-number encrypting and publicly sending messages that you still want to be secret 20 years from now (i.e. you are paranoid or a government ... ahem.) On the other hand, this is the first time our work has been directly compared to a James Bond film ...
  • 13/9/2007: Well that didn't take long! Slashdot covers the New Scientist article which covers our arXiv paper which is still with the referees...
  • 13/9/2007: In today's New Scientist there is an article, Quantum threat to our secret data, prompted in part by our recent arXiv paper, Experimental demonstration of Shor's algorithm with quantum entanglement. It's probably far too soon to talk about threats! What's interesting is that our experiment demonstrated every stage of Shor's algorithm. It is not scalable in itself, but there is a in-principle path to scalability which we and our colleagues are investigating to see if and when that's going to be feasible.
  • 12/9/2007: There's a nice write-up of our work in today's New Scientist blog, How a quantum computer factorises numbers, which says "Today, New Scientist reveals details of a device that may go down in history as the forerunner of the quantum computer." Gosh!
  • 20/7/2007: After a successful (and amazingly quick) year, Devon Biggerstaff has finished his Fulbright and is starting a Masters with Kevin Resch at the University of Waterloo. Good luck Devon, and come back soon!
  • 30/06/2007: Dr Dr Thomas Jennewein from University of Vienna, begins the first of two three- month visits with the QT Lab. Welcome Thomas!
  • 15/6/2007: Happy Magna Carta Day! In PhysOrg today there's a nice interview with Kevin Resch, Super resolution phase measurements – without entanglement.
  • 31/5/2007: Happy Vesak! Our paper on Time-Reversal and Super-Resolving Phase Measurements appeared today in Physical Review Letters.
  • 16/5/2007: Happy Dunghri Mela! Our paper on Entanglement Generation by Fock-State Filtration appeared today in Physical Review Letters.
  • 4/5/2007: After 5 fabulous years, Doctor Nathan Langford (sounds great doesn't it Nathan!) is leaving us to work as a Postdoctoral Scientist at the University of Vienna. Good luck Nathan, and thank you for all the fun!
  • 13/3/2007: Wonderful news today - after competitive review, the Australian Centre of Excellence for Quantum Computer Technology has been renewed until the end of 2010!
  • 14/2/2007: Happy Valentine's Day! Devon Biggerstaff is one of 5 Fulbright scholars at UQ this year - a record for an Australian university.
  • 26/1/2007: Happy Australia Day! Our paper on Measuring two-qubit gates appeared today in the Journal of the Optical Society of America B.
  • 11/1/2007: Happy New Year! Our paper on a Source of triggered entangled photon pairs? appeared today in Nature.


  • 28/11/2006: Marcelo Pereira de Almeida has joined the QT Lab from the Federal University of Rio de Janeiro. Welcome Marcelo!
  • 7/11/2006: Marco Barbieri has joined the QT Lab from the University of Rome "La Sapienza". Welcome Marco!
  • 11/10/2006: We've received an Australian Research Council International Fellowship for Dr Thomas Jennewein to join us from the University of Vienna for 6 months. Great news!
  • 3/10/2006: Cool! There's a nice article about Devon and his work in today's Sydney Morning Herald and The Age.
  • 2/10/2006: Susan Grantham has joined the QT Lab as our new Laboratory Administrator. This is great news both for us, and any of our collaborators who suffered through our previous attempts at admin. Welcome Susan!
  • 25/8/2006: After 1½ years, Kevin Resch is leaving us to start his own laboratory at the Institute for Quantum Computing and the University of Waterloo. Congratulations Kevin, and have fun with all your new toys!
  • 28/7/2006: Devon Biggerstaff has joined the QT Lab. Welcome Devon!
  • 23/6/2006: We're advertising 3 more Postdoctoral Fellow positions. Please contact us if you are interested!
  • 11/5/2006: Andrew has been awarded one of twenty-five Australian Research Council Federation Fellowships. This is great news - it allows us to establish a research program in Integrated Quantum Photonics, to make optical quantum information technology more robust and better performing.
  • 30/3/2006: After 4½ years, Jeremy O'Brien is leaving us to start his own laboratory at the University of Bristol. Congratulations Jeremy, and have fun setting up in the UK!
  • 28/2/2006: Ben Lanyon has joined the QT Lab. Welcome Ben!
  • 6/2/2006: After 4 years, Geoff Pryde is leaving us to start his own laboratory at Griffith University. Congratulations Geoff, now the fun begins anew!
  • 20/1/2006: We received a generous International Science Linkage grant from the Department of Education, Science, and Training for our project on Optical Quantum Computing.