Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Losert, Merritt P."'
Autor:
Klos, Jan, Tröger, Jan, Keutgen, Jens, Losert, Merritt P., Riemann, Helge, Abrosimov, Nikolay V., Knoch, Joachim, Bracht, Hartmut, Coppersmith, Susan N., Friesen, Mark, Cojocaru-Mirédin, Oana, Schreiber, Lars R., Bougeard, Dominique
Publikováno v:
Adv. Sci. 2407442 (2024)
Understanding crystal characteristics down to the atomistic level increasingly emerges as a crucial insight for creating solid state platforms for qubits with reproducible and homogeneous properties. Here, isotope composition depth profiles in a SiGe
Externí odkaz:
http://arxiv.org/abs/2405.19974
Autor:
Losert, Merritt P., Oberländer, Max, Teske, Julian D., Volmer, Mats, Schreiber, Lars R., Bluhm, Hendrik, Coppersmith, S. N., Friesen, Mark
Coherent coupling between distant qubits is needed for any scalable quantum computing scheme. In quantum dot systems, one proposal for long-distance coupling is to coherently transfer electron spins across a chip in a moving potential. Here, we use s
Externí odkaz:
http://arxiv.org/abs/2405.01832
Autor:
Frink, Collin C. D., Woods, Benjamin D., Losert, Merritt P., MacQuarrie, E. R., Eriksson, M. A., Friesen, Mark
Nanofabricated metal gate electrodes are commonly used to confine and control electrons in electrostatically defined quantum dots. However, these same gates impart a complicated strain geometry that affects the confinement potential and potentially i
Externí odkaz:
http://arxiv.org/abs/2312.09235
Autor:
Losert, Merritt P., Eriksson, M. A., Joynt, Robert, Rahman, Rajib, Scappucci, Giordano, Coppersmith, Susan N., Friesen, Mark
Publikováno v:
Phys. Rev. B 108, 125405 (2023)
Silicon/silicon-germanium heterostructures have many important advantages for hosting spin qubits. However, controlling the valley splitting (the energy splitting between the two low-lying conduction-band valleys) remains a critical challenge for ens
Externí odkaz:
http://arxiv.org/abs/2303.02499
Autor:
McJunkin, Thomas, Harpt, Benjamin, Feng, Yi, Losert, Merritt P., Rahman, Rajib, Dodson, J. P., Wolfe, M. A., Savage, D. E., Lagally, M. G., Coppersmith, S. N., Friesen, Mark, Joynt, Robert, Eriksson, M. A.
Publikováno v:
Nature Communications 13, 7777 (2022)
Large-scale arrays of quantum-dot spin qubits in Si/SiGe quantum wells require large or tunable energy splittings of the valley states associated with degenerate conduction band minima. Existing proposals to deterministically enhance the valley split
Externí odkaz:
http://arxiv.org/abs/2112.09765
Autor:
Wuetz, Brian Paquelet, Losert, Merritt P., Koelling, Sebastian, Stehouwer, Lucas E. A., Zwerver, Anne-Marije J., Philips, Stephan G. J., Mądzik, Mateusz T., Xue, Xiao, Zheng, Guoji, Lodari, Mario, Amitonov, Sergey V., Samkharadze, Nodar, Sammak, Amir, Vandersypen, Lieven M. K., Rahman, Rajib, Coppersmith, Susan N., Moutanabbir, Oussama, Friesen, Mark, Scappucci, Giordano
Publikováno v:
Nature Communications 13, 7730 (2022)
Electron spins in Si/SiGe quantum wells suffer from nearly degenerate conduction band valleys, which compete with the spin degree of freedom in the formation of qubits. Despite attempts to enhance the valley energy splitting deterministically, by eng
Externí odkaz:
http://arxiv.org/abs/2112.09606
Autor:
Dodson, J. P., Ercan, H. Ekmel, Corrigan, J., Losert, Merritt, Holman, Nathan, McJunkin, Thomas, Edge, L. F., Friesen, Mark, Coppersmith, S. N., Eriksson, M. A.
Publikováno v:
Physical Review Letters (Vol. 128, Issue 14), (2022)
The energies of valley-orbit states in silicon quantum dots are determined by an as yet poorly understood interplay between interface roughness, orbital confinement, and electron interactions. Here, we report measurements of one- and two-electron val
Externí odkaz:
http://arxiv.org/abs/2103.14702
Autor:
Wuetz, Brian Paquelet, Losert, Merritt P., Tosato, Alberto, Lodari, Mario, Bavdaz, Peter L., Stehouwer, Lucas, Amin, Payam, Clarke, James S., Coppersmith, Susan N., Sammak, Amir, Veldhorst, Menno, Friesen, Mark, Scappucci, Giordano
Publikováno v:
Phys. Rev. Lett. 125, 186801 (2020)
We determine the energy splitting of the conduction-band valleys in two-dimensional electrons confined to low-disorder Si quantum wells. We probe the valley splitting dependence on both perpendicular magnetic field $B$ and Hall density by performing
Externí odkaz:
http://arxiv.org/abs/2006.02305
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