## Profile2004 - 2007
Ph.D., Department of Physics, Imperial College London, U.K.
Supervisor: Professor Sir Peter L. Knight
Thesis title: The Atomic and Optical Realizations of Cluster Quantum Computation
2001 - 2003
M.S., Department of Physics, Sogang University, Seoul, Republic of Korea
1994 - 2001
B.S., Department of Physics (minor: Computer Science), Sogang University, Seoul, Republic of Korea
One-way quantum computation in higher dimensions
Linear optical quantum computing
Quantum information science in optical lattices
Quantum cryptography ## Outputs
Title | Category | Date | Authors |
Error-correcting one-way quantum computation with global entangling gates University of Calgary | Publication | 2009-09-01 | J. Joo, D. Feder | One-way quantum computation with four-dimensional photonic qudits University of Calgary | Publication | 2007-11-01 | J. Joo, P. L. Knight, J. L. O’Brien, T. Rudolph | A heralded two-qutrit entangled state University of Calgary | Publication | 2009-01-01 | J. Joo, T. Rudolph, B. C. Sanders | Bell's inequality test with an optical two-qutrit entangled state University of Calgary | Presentation | 2008-08-23 | J. Joo, A. Laing, T. Rudolph, L. J. O'Brien | Quantum computation in optical lattices University of Calgary | Presentation | 2008-09-03 | J. Joo | Teleportation on optical qutrits University of Calgary | Presentation | 2008-09-09 | J. Joo | One-way quantum computation with quantum error-correcting code University of Calgary | Presentation | 2008-09-12 | J. Joo | Error-correcting one-way quantum computation with global entangling gates University of Calgary | Presentation | 2009-05-05 | J. Joo, D. Feder | Non-locality tests for an optical two-qudit state University of Calgary | Presentation | 2008-08-28 | J. Joo, T. Rudolph, B. C. Sanders | Error-correcting one-way quantum computation with global entangling gates University of Calgary | Presentation | 2009-08-19 | J. Joo, D. Feder | Concatenated logical cluster state using 5-qubit QECCThe highly entangled quantum states known as cluster states constitute a universal resource for measurement-based quantum computing (MBQC). How to construct a fault-tolerant protocol for MBQC is still an open question, however. We show how to build concatenated cluster states for MBQC using the five-qubit quantum error-correcting code. These states can be built by a series of single-qubit Hadamard and two-qubit controlled-phase gates. The number of operations is significantly reduced through the use of local complementation graph operations. Error thresholds are investigated and compared with current experimental capabilities. University of Calgary | Presentation | 2010-03-17 | J. Joo, D. Feder | The theory of local complementation is useful for building concatenated error-correction codes University of Calgary | Presentation | 2010-05-26 | J. Joo, D. Feder | Error-correcting one-way quantum computation with global entangling gates University of Calgary | Publication | 2009-01-01 | J. Joo | Electromagnetically induced transparency combined with lasing without inversion in superconducting circuitsBy strongly driving a transition of a three-level atom one dresses the atomic states with the external field resulting in an Autler-Townes energy level splitting. The absorption and dispersion properties of the medium can then be controlled optically in order to realize effects such as electromagnetically-induced transparency (EIT) and lasing without inversion (LWI). In atomic systems, these two effects are however usually not realized together. Away from their symmetry point, both the flux qubit and the fluxonium form a $\Delta$-configuration where transitions between any two of the lowest three states are allowed. When driven by two resonant fields, we show that the system exhibits a transparency frequency window sandwiched between an absorption band (EIT) on one side and an amplification band (LWI) on the other. Finally, we discuss a possible implementation and measurement scheme using the flux qubit or the fluxonium charge qubit. University of Calgary | Presentation | 2010-03-19 | J. Bourassa, J. Joo, A. Blais, B. C. Sanders | Electromagnetically induced transparency combined with lasing without inversion in superconducting circuits University of Calgary | Publication | 2010-03-01 | J. Bourassa, J. Joo, A. Blais |
| |