|PhD in Physics, University of Wisconsin-Madison (2012)|
Postgraduate Diploma in Education, National Institute of Education (1999)
BSc (Hons), National University of Singapore (1998)
I am a Lecturer in the Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University. I received my PhD in Physics at the University of Wisconsin-Madison. Prior to that, I was an educator with the Singapore Ministry of Education for almost a good decade. Education is one of my core passions, as is Physics. I work in the quantum information and quantum computation.
|Quantum Information and Computation |
In the field of quantum information and computation, some of the quantum computer architectures that I am interested to study include semiconductor quantum dots and hybrid photonic-solid state systems. Such systems hold the promise of scalability due to their small (~100 nm) dimensions as well as the integrability with current microelectronics technologies. Some of the theoretical goals are to understand the performance of various quantum control and entanglement schemes, how decoherence properties and qubit interactions scale with increasing number and connectivity of qubits, and the investigation of novel quantum algorithms. With the scaling up of qubits into a quantum network, it therefore becomes important to understand the behaviour of networks and their properties.
Foundational Issues in Quantum Mechanics
I am interested in understanding foundational issues in Quantum Mechanics. Is the quantum state description a mere mathematical tool? Does a pure quantum state correspond directly to reality or only some information about a certain aspect of reality, that upon measurement is revealed to us? In the ontological vs epistemological debate over the nature of quantum reality, can we deduce no-go theorems that allow experimenters to test and resolve the issue?
- Dohun Kim, Z.Shi, C.B.Simmons, D.R.Ward, J.R.Prance, T.S.Koh, J.K.Gamble, D.E.Savage, M.G.Lagally, Mark Friesen, S.N.Coppersmith, and Mark A. Eriksson. (2014). Quantum control and process tomography of a semiconductor quantum dot hybrid qubit. Nature, 511, 70.
- Z.Shi, C.B.Simmons, D.R.Ward, J.R.Prance, Xian Wu, T.S.Koh, J.K.Gamble, D.E.Savage, M.G.Lagally, Mark Friesen, S.N.Coppersmith, and M.A.Eriksson. (2014). Fast coherent manipulation of three-electron states in a double quantum dot. Nature Communications, 5, 3020.
- T.S.Koh, S.N.Coppersmith, and Mark Friesen. (2013). High fidelity gates in quantum dot spin qubits. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 110(49), 19695.
- T.S.Koh, J.K.Gamble, M.A.Eriksson, Mark Friesen, and S.N.Coppersmith. (2012). Pulse-gated quantum dot hybrid qubit. Physical Review Letters, 109(25), 250503.
- T.S.Koh, C.B.Simmons, M.A.Eriksson, S.N.Coppersmith, and Mark Friesen. (2011). Unconventional transport in the hole regime of a Si double quantum dot. Physical Review Letters, 106(18), 186801.