
Pradeep Sarvepalli analyzing counterexamples to the socalled LU/LC conjecture. 
Our work is in quantum information, ranging from theoretical work on `Models of quantum computation' and quantum faulttolerance to experiments on decoherence, quantum dots and topologically protected qubits.
Featured publication: Experimental demonstration of topological error correction. [Posted June 7, 2012] Here we report the experimental demonstration of topological error correction with an eightphoton cluster state. We show that a correlation can be protected against a single error on any quantum bit. Also, when all quantum bits are simultaneously subjected to errors with equal probability, the effective error rate can be significantly reduced. Our work demonstrates the viability of topological error correction for faulttolerant quantum information processing.
The present experiment uses an 8qubit cluster state which shares topological features with its larger (potentially much larger) cousin, the threedimensional cluster state. A 3D cluster state is for measurementbased quantum computation (MBQC) what the Kitaev surface code is for the circuit model: a faulttolerant fabric in which protected quantum gates can be implemented in a topological fashion. The present experiment demonstrates the faulttolerance properties, not yet the encoded quantum gates. For the latter, larger cluster states will be required in future experiments. The smallest possible setting to demonstrate topological errorcorrection with cluster states requires 8 qubits, which was just in reach of the present photonbased experiment.
Journal Reference: XingCan Yao et al, Experimental demonstration of topological error correction, Nature 482, 489 (2012).
Also see James D. Franson, Quantum computing: A topological route to error correction, Nature 482, News and Views, (2012).
Topological error correction with cluster states.

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Robert Raussendorf
Assistant Professor in Physics Office: Hennings 338 Tel.: (604) 8223253 email: raussen[at]phas[dot]ubc[dot]ca 
Research: Quantum computation ,
My research interest is in quantum computation, in particular computational models.
I have invented the oneway quantum computer (QCc) together with
Hans Briegel (UK patent GB 2382892, US patent 7,277,872).
The QCc is a scheme of universal quantum computation by local
measurements on a suitable multiparticle entangled quantum state.
Quantum information is written onto the initial state, processed
and read out by onequbit measurements only.
As the computation proceeds, the entanglement in the
resource state is progressively destroyed.
Measurements replace unitary evolution as the elementary process
driving a quantum computation. I also work in quantum
errorcorrection and on connections between quantum computation
and foundations of quantum mechanics.
See: R. Raussendorf and J. Harrington, Faulttolerant quantum computation with high threshold in two dimensions, arXiv:quantph/0610082, Phys. Rev. Lett. 98, 150504 (2007). 

Faculty with accomplishments and research interests in quantum information  
Andrea Damascelli
Associate Professor in Physics Office , Tel.: (604) 822 email: 
Research: Andrea Damascelli is Canada Research Chair in the Electronic Structure of Solids, and the leader of the Quantum Materials Laboratory at UBC and of the Quantum Materials Spectroscopy Center at the Canadian Light Source. His research program utilizes high resolution spectroscopic techniques based on ultraviolet and soft xray synchrotron radiation, in particular spin and angleresolved photoemission spectroscopy (S+ARPES), to investigate the electronic structures of quantum materials, such as unconventional superconductors, novel magnets, and topological insulators. In the area of quantum information, his group is working on the development of a device based on materials with novel quantum properties, to be implemented as a key component in spintronics and quantum computing; the device will hold a macroscopic and robust quantum state at the interface between a superconductor and the recently discovered topological insulator.  
Josh Folk
Associate Professor in Physics Office , Tel.: (604) 822 email: 
Research: Our group measures the electronic properties of nanometer and micronscale devices at temperatures from 0.01K to 1K, where electronic transport is dominated by quantum mechanical effects. Many of our experiments focus on electron spin, because spin is the quantum degree of freedom that is most resilient to environmental decoherence. Specific projects currently underway include spin current control and measurement in GaAs circuits, decoherence and Kondo interactions in quantum dots, and graphene nanoelectronics.  
Kirk Madison
Associate Professor in Physics Office , Tel.: (604) 822 email: 
Research: Quantum gases. My background is in the study of few and manybody quantum phenomena using laser cooled atomic gases. Career accomplishments include the first observation of the nonexponential decay of an unstable quantum system (a fundamental prediction of quantum mechanics which was only verified experimentally 40 years after it was originally proposed), the study of Bloch oscillations and WannierStark states using cold atoms trapped in optical lattices (phenomena in the field of quantum transport) , and the first experimental realization of vortex nucleation in an atomic Bose Einstein condensate. My research now is aimed at realizing quantum gases of molecules assembled from laser cooled atomic gases. Recent achievements at UBC on this topic include the production of a Bose Einstein condensate of ultracold Lithium molecules.  
Takamasa Momose
Professor (Chemistry) Office: Chem A327 Tel: (6048225401) email:momose@chem.ubc.ca 
Research: Highresolution infrared and visible spectroscopy; laser spectrosopy; low temperature chemistry; tunneling reactions; making cold molecules; quantum computation.  
Associate Professor in Physics Office Henn 420 Tel.: (604) 8222138 email: 
Research: My research is focused on string theory, quantum gravity and quantum
field theory. In recent work, I and others have found intriguing
evidence that the emergence of spacetime in quantum gravity is
intimately connected to the quantum entanglement of some fundamental
underlying degrees of freedom. This suggests the dramatic result that
the existence of a classical spacetime is related to the fundamentally
quantum mechanical phenomenon of entanglement. Quantitatively, there is
evidence that certain measures of entanglement in the underlying
degrees of freedom are directly related to geometrical quantities
(certain areas or volumes) in the corresponding spacetime. My current
research is focused on exploring these connections between quantum
information theory and quantum gravity. I have also recently introduced
and studied novel quantum information theoretic observables in the
context of quantum field theory.
See: Mark Van Raamsdonk, 

Moshe Rozali
Associate Professor in Physics Office Tel: (604) 822 email: 
Research: My main research interests involve string theory as extension of quantum field theory that includes quantum gravitational phenomena, and relatedly  describing strongly coupled systems. As such, string theory has diverge applications to many areas of physics. My main interest in quantum information is the question on whether quantum field theory provides additional resources for quantum computation, above and beyond quantum mechanics with finitely many degrees of freedom. String theory related techniques to calculating quantum field theory amplitudes may be useful in shedding light on this issue.  
Gordon Semenoff
Professor of Physics Office , Tel.: (604) 822 email: 
Research: String theory and condensed matter physics. In quantum information: I am interested in the interplay between issues in quantum information theory and topological phenomena, such as the formation
of midgap bound states of electrons interacting with vortices and domain
walls, particularly how quantum information is encoded in such states.
See: P. Sodano and G.W. Semenoff, Stretching the Electron as far as it will go, arXiv:condmat/0605147. 

Philip Stamp
Professor of Physics Office Tel: (604) 822 email: 
Research: Stronglycorrelated quantum matter: quantum magnetism, coherence phenomena in biological systems, quantum spin nets and qubits. One of the most exciting challenges in physics is to devise networks of 'qubits' (ie., quantum 2level systems) which can behave as a quantum information processing system. In our view the most promising candidates for the qubits are electronic and/or nuclear spins, provided the fundamental problem of decoherence can be brought under control.
See: N.V. Prokof'ev, P.C.E. Stamp, Theory of the Spin Bath Rep. Prog. Phys. 63, 669726 (2000). 

Bill Unruh
Professor of Physics Office Tel.: (604) 822 email: 
Research: Quantum Mechanics and General Relativity.  
Konrad Walus
Associate Professor in Electrical Engineering Office Kaiser 4038 Tel.: (604) 8224060 email: 
Research: Konrad Walus has contributed to the development of design tools,
theoretical models, and circuits for an emerging nanotechnology based on the
coupled dynamics of locallyinteracting finitestate nanostructures, specifically
the paradigm called quantumdot cellular automata (QCA). QCA has demonstrated
some benefits to traditional CMOS based technologies for realizing high density
logic including lower predicted power dissipation and scaling limits in the atomic
size range. QCA has also been explored as a platform for conducting quantum
information processing and this work is still ongoing. QCA devices and circuits
have been realized in several platforms including coupled metallicislands,
nanomagnetics, and more recently in silicon.
See: Marco Taucer, Faizal Karim, Konrad Walus, Robert A. Wolkow, Consequences of Manycell Correlations in Treating Clocked Quantumdot Cellular Automata Circuits/span>, arXiv:1207.7008 (cond mat). 

Jeff Young
Professor of Physics Lab: AMPEL, Tel.: (604) 8228779 email: young@phas.ubc.ca 
Research: NanoPhotonics. My group develops waveguidebased optical "circuits" that concentrate and manipulate infrared radiation on micrometre length scales. Much of our past work has focussed on demonstrating how the nanophotonic components of these circuits can be used to enhance the effective interaction strength of light and electrons, as evidenced by the observation of nonlinear optical responses at power levels much lower than typically required in bulk materials. Our main QI related project incorporates colloidal, 5 nm diameter PbSe quantum dots, siteselectively located in a photonic crystal microcavity fabricated in silicononinsulator wafers, as discrete quantum oscillators that preferentially decay by exciting a photon in the microcavity. This photon is then efficiently coupled to a single mode silicon waveguide that can transport the photon with low loss to other circuit elements on the chip. With further development, this could be developed into a room temperature, integrated singlephoton source.  
Fei Zhou
Associate Professor in Physics Office Hennings 345 Tel.: (604) 8225098 email: 
Research in QI: To understand the dynamics of atombased fault tolerant quantum information storages and quantum computers; and to design topological quantum computing states in optical lattices.  
Postdocs  
Raouf Dridi
Postdoc email: dridi.raouf[at]gmail[dot]com. 
Research: Quantum Foundations and computer algebra.  
Leon Loveridge
Postdoc email: Leon[at]phas[dot]ubc[dot]ca 
Research: Quantum Measurement Theory.  
Vijay Singh
Postdoc (Main appointment with Petr Lisonek/ SFU Math) email: vijay.k.1[at]gmail[dot]com 
Research: Quantum coding theory. The LU/LC conjecture.  
Students  
Poya Haghnegahdar
Graduate Student (PhD) email: phaghneg[at]phas[dot]ubc[dot]ca 
Research: quantum information. Quantum codes and tensor networks.  
Cihan Okay
Graduate Student at PIMS Supervisor: Alejandro Adem Office: WMAX 208, Tel: 6048220411 email: okay[at]math[dot]ubc[dot]ca 
Research: My research interest in Algebraic Topology can be summarized as group cohomology and homotopy colimits of classifying spaces. As for physics and quantum information, my interest is in topological quantum computation.  
Arman Zaribafiyan
Graduate Student (Masters) email: zaribafiyan[at]gmail[dot]com 
Research: Faulttolerant quantum computation. 