Pages maintained by
Ben Buchler

Research School of Physics and
Department of Quantum Science

The research interests of the quantum optics group are experimental quantum information, the physics and applications of of atom-light interaction, quantum metrology and non-linear optics. We are located in the Department of Quantum Science, which is a part of the Research School of Physics and Engineering.


Our group forms a part of the Centre for Quantum Computation and Communications Technology. This ARC Centre of Excellence is based and the University of New South Wales and has nodes at the University of Queensland, University of Melbourne, Griffith Univeristy, UNSW@ADFA as well as the ANU.




Nanowire cooling and improved force measurement in Nat. Comm.

Quantum computing built into a quantum memory now out in PRL.

Optical levitation without scattering using a tripod of light. 

Quantum random numbers, generated in our lab, now live in your browser!



Recent Publications

Maximization of Extractable Randomness in a Quantum Random-Number Generator
J. Y. Haw, S. M. Assad, A. M. Lance, N. H. Y. Ng, V. Sharma, P. K. Lam, and T. Symul

Nonlinear entanglement and its application to generating cat States.
Y Shen, S M Assad, N B Grosse, X Y Li, M D Reid, and P K Lam.
Phys Rev Lett 114, 100403 (2015).
Multipartite Einstein-Podolsky-Rosen steering and genuine tripartite entanglement with optical networks.
Seiji Armstrong, Meng Wang, Run Yan Teh, Qihuang Gong, Qiongyi He, Jiri Janousele, Hans-Albert Bachor, Margaret D Reid, and Ping Koy Lam.
Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth.
J Geng, G T Campbell, J Bernu, D B Higginbottom, B M Sparkes, S M Assad, W P Zhang, N P Robins, P K Lam, and B C Buchler.
New J Phys, 2014 vol. 16 (11) p. 113053.
Asymmetric EPR entanglement in continuous variable systems
K. Wagner, J. Janousek, S. Armstrong, J.-F. Morizur, P. K. Lam and H.-A. Bachor
J. Phys. B: At. Mol. Opt. Phys. 47 225502 (2014)
Theoretical analysis of an ideal noiseless linear amplifier for Einstein-Podolsky-Rosen entanglement distillation
J. Bernu, S. Armstrong, T. Symul, T.C. Ralph and P.K. Lam
J Phys B-At Mol Opt,  47, 215503 (2014)
Multimode laser cooling and ultra-high sensitivity force sensing with nanowires
Mahdi Hosseini, Giovanni Guccione, Harry J. Slatyer, Ben C. Buchler & Ping Koy Lam
Nature Communications 5, 4663 (2014)
Configurable Unitary Transformations and Linear Logic Gates Using Quantum Memories
G. T. Campbell, O. Pinel, M. Hosseini, T. C. Ralph, B. C. Buchler, and P. K. Lam
Phys. Rev. Lett. 113, 063601 (2014).
Impact of backscattered light in a squeezing-enhanced interferometric gravitational-wave detector
S. S. Y. Chua et al.
Classical and Quantum Gravity, 31, 035017 (2014).
Measurement-based noiseless linear amplification for quantum communication
Helen M. Chrzanowski, Nathan Walk, Syed M. Assad, Jiri Janousek, Sara Hosseini, Timothy C. Ralph, Thomas Symul & Ping Koy Lam
Nature Photonics 8 333 (2014).
Experimental verification of quantum discord in continuous-variable states
S. Hosseini, S. Rahimi-Keshari, J. Y. Haw, S. M. Assad, H. M. Chrzanowski, J. Janousek, T. Symul, T. C. Ralph and P. K. Lam
Journal of Physics B, 47, 025503 (2014).
Gradient Echo Quantum Memory in Warm Atomic Vapor
Olivier Pinel, Mahdi Hosseini, Ben M. Sparkes, Jesse L. Everett, Daniel Higginbottom, Geoff T. Campbell, Ping Koy Lam and  Ben C. Buchler
JoVE 2013 81, e5055 (2013).
Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light.
LIGO Collaboration and M. Stefszky, B. C. Buchler and P.K. Lam
Nat Photonics,  7, 613-619 (2013).
Scattering-Free Optical Levitation of a Cavity Mirror
G. Guccione, M. Hosseini, S. Adlong, M. T. Johnsson, J. Hope, B. C. Buchler, and P. K. Lam
Phys. Rev. Lett. 111, 183001 (2013) 
Reconstruction of photon number conditioned states using phase randomized homodyne measurements
H M Chrzanowski, S M Assad, J Bernu, B Hage, A P Lund, T C Ralph, P K Lam and T Symul
J. Phys. B: At. Mol. Opt. Phys. 46 104009 (2013)
Gradient echo memory in an ultra-high optical depth cold atomic ensemble
B M Sparkes, J Bernu, M Hosseini, J Geng, Q Glorieux, P A Altin, P K Lam, N P Robins and B C Buchler
Generation and interferometric analysis of high charge optical vortices
Yong Shen, Geoff T Campbell, Boris Hage, Hongxin Zou, Ben C Buchler and Ping Koy Lam
 Journal of  Optics 15 044005 (2013)




Other groups in the Department of Quantum Science....

Quantum Imaging Group

Centre for Gravitational Physics

BEC & Atom Laser Group

Pageloads since 2003:

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