Publications Caspar H. van der Wal

Page last modified 13 Oct. 2009.

	Work on quantum coherent dynamics and electron spins in solid state devices (recent publications)
37.	Crystal-orientation dependant spin dephasing for 2D and bulk electrons in GaAs wires S. Z. Denega, T. Last, J. Liu, A. Slachter, P. J. Rizo, P. H. M. van Loosdrecht, B. J. van Wees, D. Reuter, A. D. Wieck, C. H. van der Wal, submitted; available at http://arxiv.org/abs/0910.2336.
36.	Optical probing of spin dynamics two-dimensional and bulk electrons in a GaAs/AlGaAs heterojunction system P. J. Rizo, A. Pugzlys, A. Slachter, S. Z. Denega, D. Reuter, A. D. Wieck, P. H. M. van Loosdrecht, C. H. van der Wal, submitted; available at http://arxiv.org/abs/0910.1714.
35.	Spin-dephasing anisotropy for electrons in a diffusive quasi-1D GaAs wire J. Liu, T. Last, E. J. Koop, S. Denega, B. J. van Wees, C. H. van der Wal, published online in J. Supercond. Nov. Magn.; pdf file; doi 10.1007/s10948-009-0525-2; available at http://arxiv.org/abs/0810.1413.
34.	Towards quantum optics and entanglement with electron spin ensembles in semiconductors Caspar H. van der Wal, Maksym Sladkov, Solid State Sciences 11, 935 (2009) [special issue on Solid state approaches to quantum information processing and communication]; pdf file; also available at http://arxiv.org/abs/0804.2953.
33.	Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures P. J. Rizo, A. Pugzlys, J. Liu, D. Reuter, A. D. Wieck, C. H. van der Wal, P. H. M. van Loosdrecht, Rev. Sci. Instr. 79, 123904 (2008); pdf file; also available at http://arxiv.org/abs/0809.3209.
32.	The annealing mechanism of AuGe/Ni/Au ohmic contacts to a two-dimensional electron gas in GaAs/AlGaAs heterostructures E. J. Koop, M. J. Iqbal, F. Limbach, M. Boute, B. J. van Wees, D. Reuter, A. D. Wieck, B. J. Kooi, C. H. van der Wal, submitted; available at http://arxiv.org/abs/0809.0928.
31.	Confinement-enhanced spin relaxation for electron ensembles in large quantum dots E. J. Koop, B. J. van Wees, C. H. van der Wal, submitted; available at http://arxiv.org/abs/0804.2968.
30.	Spin accumulation and spin relaxation in a large open quantum dot E. J. Koop, B. J. van Wees, D. Reuter, A. D. Wieck, C. H. van der Wal, Phys. Rev. Lett. 101, 056602 (2008); pdf file; also available at http://arxiv.org/abs/0801.2699.
29.	Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance at ferromagnet/nonmagnet contact M. V. Costache, S. M. Watts, C. H. van der Wal, B. J. van Wees, Phys. Rev. B 78, 064423 (2008); pdf file; also available at http://arxiv.org/abs/0809.3859.
28.	Persistence of the 0.7 anomaly of quantum point contacts in high magnetic fields E. J. Koop, A. I. Lerescu, J. Liu, B. J. van Wees, D. Reuter, A. D. Wieck, C. H. van der Wal, submitted; available at http://arxiv.org/abs/0706.0792.
27.	The influence of device geometry on many-body effects in quantum point contacts: Signatures of the 0.7 anomaly, exchange and Kondo E. J. Koop, A. I. Lerescu, J. Liu, B. J. van Wees, D. Reuter, A. D. Wieck, C. H. van der Wal, J. Supercond. Nov. Magn. 20, 433 (2007); pdf file; also available at http://arxiv.org/abs/0708.0294.
26.	Non-local detection of resistance fluctuations of an open quantum dot A. I. Lerescu, E. J. Koop, C. H. van der Wal, B. J. van Wees, J. H. Bardarson, submitted to Phys. Rev. B; available at http://arxiv.org/abs/0705.3179.
25.	Charge and spin dynamics in a two dimensional electron gas A. Pugzlys, P. J. Rizo, K. Ivanin, A. Slachter, D. Reuter, A. D. Wieck, C. H. van der Wal, P. H. M. van Loosdrecht, J. Phys.: Condens. Matter 19, 295206 (2007); pdf file; also available at http://arxiv.org/abs/cond-mat/0610783.
24.	Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet M. V. Costache, M. Sladkov, S. M. Watts, C. H. van der Wal, B. J. van Wees, Phys. Rev. Lett. 97, 216603 (2006); pdf file; also available at http://arxiv.org/abs/cond-mat/0609089.
23.	Large cone angle magnetization precession of an individual nanopatterned ferromagnet with dc electrical detection M. V. Costache, S. M. Watts, M. Sladkov, C. H. van der Wal, B. J. van Wees, Appl. Phys. Lett. 89, 232115 (2006); pdf file; also available at http://arxiv.org/abs/cond-mat/0609190.
22.	On-chip detection of ferromagnetic resonance of a single submicron Permalloy strip M. V. Costache, M. Sladkov, C. H. van der Wal, B. J. van Wees, Appl. Phys. Lett. 89, 192506 (2006); pdf file; also available at http://arxiv.org/abs/cond-mat/0607036.             Link to Appl. Phys. Lett. cover image.
21.	Unified description of bulk and interface-enhanced spin pumping S. M. Watts, J. Grollier, C. H. van der Wal, B. J. van Wees, Phys. Rev. Lett. 96, 077201 (2006); pdf file; also available at http://arxiv.org/abs/cond-mat/0509100.
20.	Microwave spectroscopy on magnetization reversal dynamics of nanomagnets with electronic detection J. Grollier, M. V. Costache, C. H. van der Wal, B. J. van Wees, J. Appl. Phys. 100, 024316 (2006); pdf file; also available at http://arxiv.org/abs/cond-mat/0502197.
19.	Capacitive coupling of atomic systems to mesoscopic conductors Anders S. Sørensen, Caspar H. van der Wal, Lilian I. Childress, Mikhail D. Lukin, Phys. Rev. Lett. 92, 063601 (2004); pdf file; also available at http://arxiv.org/abs/quant-ph/0308145.
	Work on quantum optics with atom vapors (from postdoc position)
18.	Atomic memory for correlated photon states C. H. van der Wal, M. D. Eisaman, A. Andre, R. L. Walsworth, D. F. Phillips, A. S. Zibrov, M. D. Lukin, Science 301, 196 (2003); pdf file, supporting online material; pdf file.
17.	Towards storing non-classical light with atomic-vapor Raman scattering C. H. van der Wal, M. D. Eisaman, A. S. Zibrov, A. Andre, D. F. Phillips, R. L. Walsworth, M. D. Lukin, Proc. of SPIE 5115, 236 (2003), (Noise and Information in Nanoelectronics, Sensors and Standards, L. B. Kish, F, Green, G. Iannaccone, J. R. Vig, eds. (SPIE, Bellingham, WA, 2003)); pdf file.
16.	Toward manipulating quantum information with atomic ensembles M. D. Lukin, A. Andre, M. D. Eisaman, M. Hohensee, D. F. Phillips, C. H. van der Wal, R. L. Walsworth, A. S. Zibrov, in Proceedings of the XVIII International Conference on Atomic Physics, H. R. Sadeghpour, D. E. Pritchard, E. J. Heller, eds. (World Scientific, Singapore, 2003), pp. 231-240; pdf file.
	Work on quantum coherent solid state devices (from PhD research)
15.	Decoherence of flux qubits coupled to electronic circuits F. K. Wilhelm, M. J. Storcz, C. H. van der Wal, C. J. P. M. Harmans, J. E. Mooij, Advances in Solid State Physics 43, 763 (2003); also available at http://arxiv.org/abs/cond-mat/0305349.
14.	Quantum superposition of charge states on capacitively coupled superconducting islands C. P. Heij, D. C. Dixon, C. H. van der Wal, P. Hadley, J. E. Mooij, Phys. Rev. B 67, 144512 (2003); pdf file.
13.	Flux-based superconducting qubits for quantum computation T. P. Orlando, S. Lloyd, L. S. Levitov, K. K. Berggren, M. J. Feldman, M. F. Bocko, J. E. Mooij, C. J. P. Harmans, C. H. van der Wal, Phys. C 372, 194 (2002); pdf file.
12.	Engineering the quantum measurement process for the persistent current qubit T. P. Orlando, Lin Tian, D. S. Crankshaw, S. Lloyd, C. H. van der Wal, J. E. Mooij, F. Wilhelm, Phys. C 368, 294 (2002); pdf file.
11.	Engineering decoherence in Josephson persistent-current qubits: Measurement apparatus and other electromagnetic environments Caspar H. van der Wal, F. K. Wilhelm, C. J. P. M. Harmans, J. E. Mooij, Eur. Phys. J. B 31, 111 (2003); pdf file; also available at http://arxiv.org/abs/cond-mat/0211664.
10.	Dual charge and vortex superpositions in a small Josephson junction array Caspar H. van der Wal, J. E. Mooij, submitted; pdf file.
9.	Macroscopic quantum superposition of current states in a Josephson-junction loop F. K. Wilhelm, C. H. van der Wal, A. C. J. ter Haar, R. N. Schouten, C. J. P. M. Harmans, J. E. Mooij, T. P. Orlando, Seth Lloyd, Usp. Fiz. Nauk (Suppl.) 171, 117 (2001); pdf file.
8.	Macroscopic quantum superposition in a three-Josephson-junction loop Caspar H. van der Wal, A. C. J. ter Haar, F. K. Wilhelm, R. N. Schouten, C. J. P. M. Harmans, T. P. Orlando, Seth Lloyd, J. E. Mooij, in Macroscopic Quantum Coherence and Quantum Computing, D.V. Averin, B. Ruggiero, P. Silvestrini, eds. (Kluwer Academic Publishers, Dordrecht, 2001), pp. 25-34; pdf file.
7.	Quantum superposition of macroscopic persistent-current states Caspar H. van der Wal, A. C. J. ter Haar, F. K. Wilhelm, R. N. Schouten, C. J. P. M. Harmans, T. P. Orlando, Seth Lloyd, J. E. Mooij, Science 290, 773 (2000); pdf file. [ This publication was ranked in Science Magazine top 10    Breakthroughs of the Year 2000 (link). ]
6.	Decoherence of the superconducting persistent-current qubit Lin Tian, L. S. Levitov, J. E. Mooij, T. P. Orlando, Caspar H. van der Wal, Seth Lloyd, in Quantum Mesoscopic Phenomena and Mesoscopic Devices in Microelectronics, I. O. Kulik, R. Ellialtioglu, eds. (Kluwer Academic Publishers, Dordrecht, 2000), pp. 429-438; pdf file; also available at http://arxiv.org/abs/cond-mat/9910062.
5.	Quantum transitions of a small Josephson junction array Caspar H. van der Wal, P. Kuiper, J. E. Mooij, Phys. B 280, 243 (2000); pdf file.
4.	Superconducting persistent-current qubit T. P. Orlando, J. E. Mooij, Lin Tian, Caspar H. van der Wal, L. S. Levitov, Seth Lloyd, J. J. Mazo, Phys. Rev. B 60, 15398 (1999); pdf file; also available at http://arxiv.org/abs/cond-mat/9908283.
3.	Josephson persistent-current qubit J. E. Mooij, T. P. Orlando, L. Levitov, Lin Tian, Caspar H. van der Wal, Seth Lloyd, Science 285, 1036 (1999); pdf file.
2.	Controlled single-Cooper-pair charging effects in a small Josephson junction array Caspar H. van der Wal, J. E. Mooij, J. Superc. 12, 807 (1999); pdf file, preprint with high-resolution figures pdf file.
	Other publications, perspectives
1.	Solid start for solid-state quantum bits Caspar van der Wal, Leo Kouwenhoven Physics World 12, 21 (July 1999); (link). Andrew Steane wrote a comment on this "Physics in Action" in the issue of September 1999, I agree with most of his critique (link).

My PhD thesis (Delft University of Technology, 2001)