Develops photonic quantum technology and methods for characterizing quantum states, including collaborative work on an optical controlled-NOT gate and reliable reconstruction of two-qubit states.
arXiv / Physical Review AarXiv / NatureWhite’s research links making a quantum operation work with establishing what the experiment actually produced. An optical controlled-NOT gate demonstrates interactions between photon-encoded qubits, while quantum-state tomography provides methods to reconstruct and assess the resulting states. Those contributions are complementary: an experimental device needs trustworthy characterization as well as control. His current Queensland research continues that focus on photonic technology and entanglement, with the early demonstrations credited to their collaborating teams.
Andrew White / University of QueenslandarXiv / Physical Review AarXiv / NatureThe work behind the recognition
Work, in context- 2001
Reconstructing two-qubit quantum states
White co-authored a practical treatment of two-qubit state tomography, including maximum-likelihood reconstruction and error analysis. The methods help infer physically valid density matrices from experimental measurements and quantify uncertainty in the reconstructed state.
Co-author with Daniel James, Paul Kwiat and William Munro.
Source-supported recordarXiv / Physical Review A - 2003
An all-optical controlled-NOT gate
With collaborators, White demonstrated a probabilistic controlled-NOT gate using photons and used it to generate entangled states. The experiment established a concrete optical two-qubit operation within the limitations of that implementation.
Co-author of the collaborative O’Brien et al. photonic-gate experiment.
Source-supported recordarXiv / Nature
Keep in perspective
The optical gate was probabilistic. The 2003 date refers to journal publication, preceding the 2004 arXiv posting.
The evidence map
Both views link each contribution to its sources. Choose a contribution on the map or read them all in the list.
Reconstructing two-qubit quantum states
On the Measurement of Qubits
Supports: Co-authorship, two-qubit tomography, maximum-likelihood estimation and error analysis.
Published 2001 · Checked 19 Sept 2026Credit & limits: Co-author with Daniel James, Paul Kwiat and William Munro.
Read the full contribution| Contribution | Evidence & what it supports | Credit & limits |
|---|---|---|
| Reconstructing two-qubit quantum states2001 | Primary paperOn the Measurement of Qubits Co-authorship, two-qubit tomography, maximum-likelihood estimation and error analysis. Published 2001 · Checked 19 Sept 2026 | Co-author with Daniel James, Paul Kwiat and William Munro. |
| An all-optical controlled-NOT gate2003 | Primary paperDemonstration of an all-optical quantum controlled-NOT gate Co-authorship, probabilistic optical CNOT and entanglement generation; original journal publication 2003. Published 2004 · Checked 19 Sept 2026 | Co-author of the collaborative O’Brien et al. photonic-gate experiment. |
Follow the evidence
3 sourcesPrimary papers, institutional records and attributed announcements. Each source supports the claims linked above.
- Andrew White / University of QueenslandResearcher profile
Andrew White
Professional page updated May 2026; current UQ physics professorship and laboratory leadership.
Published 2 May 2026 · Checked 19 Sept 2026 - arXiv / Physical Review APrimary paper
On the Measurement of Qubits
Co-authorship, two-qubit tomography, maximum-likelihood estimation and error analysis.
Published 2001 · Checked 19 Sept 2026 - arXiv / NaturePrimary paper
Demonstration of an all-optical quantum controlled-NOT gate
Co-authorship, probabilistic optical CNOT and entanglement generation; original journal publication 2003.
Published 2004 · Checked 19 Sept 2026