Dr Sarah Croke
- Lecturer (Physics and Astronomy)
telephone: 0141 330 4717
email: Sarah.Croke@glasgow.ac.uk
Research interests
I joined the University of Glasgow as a lecturer in September 2013, trading the cold winters of Canada for the comparatively warmer climes of the West of Scotland. I was very happy to have the opportunity to return to Glasgow, where I completed my PhD at the University of Strathclyde in 2007. In the interim I spent almost 6 years in the lovely Waterloo, Ontario, at the Perimeter Institute, where I was first a postdoctoral fellow and later a PSI fellow. My main research interests are in quantum information and quantum measurement, motivated by the fact that I remain somewhat puzzled by quantum theory. My current research focuses on quantum information protocols that require only a small quantum processor, and thus may be implementable with current or near future technology. Quantum information is a broad and interdisciplinary field sitting somewhere at the boundary between mathematics, computer science, and theoretical and experimental physics. Working in this field I have enjoyed learning parts of all of these, but remain a physicist, and am most interested in the interface between theoretical and experimental aspects of the field. I still hope to some day understand what quantum theory is trying to tell us about the world.
Publications
2018
Weir, G., Hughes, C., Barnett, S. M. and Croke, S. (2018) Optimal measurement strategies for the trine states with arbitrary prior probabilities. Quantum Science and Technology, 3(3), 035003. (doi:10.1088/2058-9565/aabc68)
Vaccaro, J., Croke, S. and Barnett, S. (2018) Is coherence catalytic? Journal of Physics A: Mathematical and Theoretical, (Accepted for Publication)
2017
Flatt, K., Barnett, S. M. and Croke, S. (2017) Gleason-Busch theorem for sequential measurements. Physical Review A: Atomic, Molecular and Optical Physics, 96(6), 062125. (doi:10.1103/PhysRevA.96.062125)
Weir, G., Barnett, S. M. and Croke, S. (2017) Optimal discrimination of single-qubit mixed states. Physical Review A: Atomic, Molecular and Optical Physics, 96(2), 022312. (doi:10.1103/PhysRevA.96.022312)
Ritboon, A., Croke, S. and Barnett, S. (2017) Proposed optical realisation of a two photon, four-qubit entangled χ state. Journal of Optics, 19(7), 075201. (doi:10.1088/2040-8986/aa72af)
Croke, S., Barnett, S. M. and Weir, G. (2017) Optimal sequential measurements for bipartite state discrimination. Physical Review A: Atomic, Molecular and Optical Physics, 95(5), 052308. (doi:10.1103/PhysRevA.95.052308)
Trautmann, N., Ferenczi, G., Croke, S. and Barnett, S. M. (2017) Holographic quantum imaging: reconstructing spatial properties via two-particle interference. Journal of Optics, 19(5), 054005. (doi:10.1088/2040-8986/aa67b6)
Croke, S. and Barnett, S. M. (2017) Difficulty of distinguishing product states locally. Physical Review A: Atomic, Molecular and Optical Physics, 95(1), 012337. (doi:10.1103/PhysRevA.95.012337)
2015
Croke, S. (2015) PT-symmetric Hamiltonians and their application in quantum information. Physical Review A: Atomic, Molecular and Optical Physics, 91(5), 052113. (doi:10.1103/PhysRevA.91.052113)
2014
Blume-Kohout, R., Croke, S. and Gottesman, D. (2014) Streaming universal distortion-free entanglement concentration. IEEE Transactions on Information Theory, 60(1), pp. 334-350. (doi:10.1109/TIT.2013.2292135)
2013
Blume-Kohout, R., Croke, S. and Zwolak, M. (2013) Quantum data gathering. Scientific Reports, 3(1800), (doi:10.1038/srep01800)
2012
Gottesman, D., Jennewein, T. and Croke, S. (2012) Longer-baseline telescopes using quantum repeaters. Physical Review Letters, 109(7), Art. 070503. (doi:10.1103/PhysRevLett.109.070503)
Croke, S. and Kent, A. (2012) Security details for bit commitment by transmitting measurement outcomes. Physical Review A: Atomic, Molecular and Optical Physics, 86(5), 052309. (doi:10.1103/PhysRevA.86.052309)
2010
Croke, S.M., O'Sullivan, S.P. and Gabuzda, D.C. (2010) The parsec-scale distributions of intensity, linear polarization and Faraday rotation in the core and jet of Mrk 501 at 8.4-1.6 GHz. Monthly Notices of the Royal Astronomical Society, 402(1), pp. 259-270. (doi:10.1111/j.1365-2966.2009.15923.x)
Lu, Y., Coish, N., Kaltenbaek, R., Hamel, D.R., Croke, S. and Resch, K.J. (2010) Minimum-error discrimination of entangled quantum states. Physical Review A: Atomic, Molecular and Optical Physics, 82(4), 042340. (doi:10.1103/PhysRevA.82.042340)
McEndoo, S., Croke, S., Brophy, J. and Busch, T. (2010) Phase evolution in spatial dark states. Physical Review A: Atomic, Molecular and Optical Physics, 81(4), 043640. (doi:10.1103/PhysRevA.81.043640)
2009
Barnett, S.M. and Croke, S. (2009) On the conditions for discrimination between quantum states with minimum error. Journal of Physics A: Mathematical and Theoretical, 42(6), 062001. (doi:10.1088/1751-8113/42/6/062001)
Barnett, S.M. and Croke, S. (2009) Quantum state discrimination. Advances in Optics and Photonics, 1(2), pp. 238-278. (doi:10.1364/AOP.1.000238)
2008
Croke, S.M. and Gabuzda, D.C. (2008) Aligning VLBI images of active galactic nuclei at different frequencies. Monthly Notices of the Royal Astronomical Society, 386(2), pp. 619-626. (doi:10.1111/j.1365-2966.2008.13087.x)
Croke, S., Barnett, S.M. and Stenholm, S. (2008) Linear transformations of quantum states. Annals of Physics, 323(4), pp. 893-906. (doi:10.1016/j.aop.2007.06.001)
Croke, S., Andersson, E. and Barnett, S.M. (2008) No-signaling bound on quantum state discrimination. Physical Review A: Atomic, Molecular and Optical Physics, 77(1), 012113. (doi:10.1103/PhysRevA.77.012113)
2007
Croke, S., Mosley, P.J., Barnett, S.M. and Walmsley, I.A. (2007) Maximum confidence measurements and their optical implementation. European Physical Journal D, 41(3), pp. 589-598. (doi:10.1140/epjd/e2006-00265-1)
2006
Croke, S., Andersson, E., Barnett, S.M. , Gilson, C.R. and Jeffers, J. (2006) Maximum confidence quantum measurements. Physical Review Letters, 96(7), 070401. (doi:10.1103/PhysRevLett.96.070401)
Mosley, P., Croke, S., Walmsley, I. and Barnett, S.M. (2006) Experimental realization of maximum confidence quantum state discrimination for the extraction of quantum information. Physical Review Letters, 97(19), p. 193601. (doi:10.1103/PhysRevLett.97.193601)
2005
Croke, S., Charlot, P., Gabuzda, D. and Sol, H. (2005) Multi-frequency multi-epoch VLBA polarization observations of MRK 501. Baltic Astronomy, 14(3), pp. 367-370.
Articles
Weir, G., Hughes, C., Barnett, S. M. and Croke, S. (2018) Optimal measurement strategies for the trine states with arbitrary prior probabilities. Quantum Science and Technology, 3(3), 035003. (doi:10.1088/2058-9565/aabc68)
Vaccaro, J., Croke, S. and Barnett, S. (2018) Is coherence catalytic? Journal of Physics A: Mathematical and Theoretical, (Accepted for Publication)
Flatt, K., Barnett, S. M. and Croke, S. (2017) Gleason-Busch theorem for sequential measurements. Physical Review A: Atomic, Molecular and Optical Physics, 96(6), 062125. (doi:10.1103/PhysRevA.96.062125)
Weir, G., Barnett, S. M. and Croke, S. (2017) Optimal discrimination of single-qubit mixed states. Physical Review A: Atomic, Molecular and Optical Physics, 96(2), 022312. (doi:10.1103/PhysRevA.96.022312)
Ritboon, A., Croke, S. and Barnett, S. (2017) Proposed optical realisation of a two photon, four-qubit entangled χ state. Journal of Optics, 19(7), 075201. (doi:10.1088/2040-8986/aa72af)
Croke, S., Barnett, S. M. and Weir, G. (2017) Optimal sequential measurements for bipartite state discrimination. Physical Review A: Atomic, Molecular and Optical Physics, 95(5), 052308. (doi:10.1103/PhysRevA.95.052308)
Trautmann, N., Ferenczi, G., Croke, S. and Barnett, S. M. (2017) Holographic quantum imaging: reconstructing spatial properties via two-particle interference. Journal of Optics, 19(5), 054005. (doi:10.1088/2040-8986/aa67b6)
Croke, S. and Barnett, S. M. (2017) Difficulty of distinguishing product states locally. Physical Review A: Atomic, Molecular and Optical Physics, 95(1), 012337. (doi:10.1103/PhysRevA.95.012337)
Croke, S. (2015) PT-symmetric Hamiltonians and their application in quantum information. Physical Review A: Atomic, Molecular and Optical Physics, 91(5), 052113. (doi:10.1103/PhysRevA.91.052113)
Blume-Kohout, R., Croke, S. and Gottesman, D. (2014) Streaming universal distortion-free entanglement concentration. IEEE Transactions on Information Theory, 60(1), pp. 334-350. (doi:10.1109/TIT.2013.2292135)
Blume-Kohout, R., Croke, S. and Zwolak, M. (2013) Quantum data gathering. Scientific Reports, 3(1800), (doi:10.1038/srep01800)
Gottesman, D., Jennewein, T. and Croke, S. (2012) Longer-baseline telescopes using quantum repeaters. Physical Review Letters, 109(7), Art. 070503. (doi:10.1103/PhysRevLett.109.070503)
Croke, S. and Kent, A. (2012) Security details for bit commitment by transmitting measurement outcomes. Physical Review A: Atomic, Molecular and Optical Physics, 86(5), 052309. (doi:10.1103/PhysRevA.86.052309)
Croke, S.M., O'Sullivan, S.P. and Gabuzda, D.C. (2010) The parsec-scale distributions of intensity, linear polarization and Faraday rotation in the core and jet of Mrk 501 at 8.4-1.6 GHz. Monthly Notices of the Royal Astronomical Society, 402(1), pp. 259-270. (doi:10.1111/j.1365-2966.2009.15923.x)
Lu, Y., Coish, N., Kaltenbaek, R., Hamel, D.R., Croke, S. and Resch, K.J. (2010) Minimum-error discrimination of entangled quantum states. Physical Review A: Atomic, Molecular and Optical Physics, 82(4), 042340. (doi:10.1103/PhysRevA.82.042340)
McEndoo, S., Croke, S., Brophy, J. and Busch, T. (2010) Phase evolution in spatial dark states. Physical Review A: Atomic, Molecular and Optical Physics, 81(4), 043640. (doi:10.1103/PhysRevA.81.043640)
Barnett, S.M. and Croke, S. (2009) On the conditions for discrimination between quantum states with minimum error. Journal of Physics A: Mathematical and Theoretical, 42(6), 062001. (doi:10.1088/1751-8113/42/6/062001)
Barnett, S.M. and Croke, S. (2009) Quantum state discrimination. Advances in Optics and Photonics, 1(2), pp. 238-278. (doi:10.1364/AOP.1.000238)
Croke, S.M. and Gabuzda, D.C. (2008) Aligning VLBI images of active galactic nuclei at different frequencies. Monthly Notices of the Royal Astronomical Society, 386(2), pp. 619-626. (doi:10.1111/j.1365-2966.2008.13087.x)
Croke, S., Barnett, S.M. and Stenholm, S. (2008) Linear transformations of quantum states. Annals of Physics, 323(4), pp. 893-906. (doi:10.1016/j.aop.2007.06.001)
Croke, S., Andersson, E. and Barnett, S.M. (2008) No-signaling bound on quantum state discrimination. Physical Review A: Atomic, Molecular and Optical Physics, 77(1), 012113. (doi:10.1103/PhysRevA.77.012113)
Croke, S., Mosley, P.J., Barnett, S.M. and Walmsley, I.A. (2007) Maximum confidence measurements and their optical implementation. European Physical Journal D, 41(3), pp. 589-598. (doi:10.1140/epjd/e2006-00265-1)
Croke, S., Andersson, E., Barnett, S.M. , Gilson, C.R. and Jeffers, J. (2006) Maximum confidence quantum measurements. Physical Review Letters, 96(7), 070401. (doi:10.1103/PhysRevLett.96.070401)
Mosley, P., Croke, S., Walmsley, I. and Barnett, S.M. (2006) Experimental realization of maximum confidence quantum state discrimination for the extraction of quantum information. Physical Review Letters, 97(19), p. 193601. (doi:10.1103/PhysRevLett.97.193601)
Croke, S., Charlot, P., Gabuzda, D. and Sol, H. (2005) Multi-frequency multi-epoch VLBA polarization observations of MRK 501. Baltic Astronomy, 14(3), pp. 367-370.
School of Physics and Astronomy, Kelvin Building,
