Slowing quantum decoherence of oscillators by hybrid processing

Autor: Kimin Park, Jacob Hastrup, Jonas Schou Neergaard-Nielsen, Jonatan Bohr Brask, Radim Filip, Ulrik L. Andersen

Publikováno v: npj Quantum Information, Vol 8, Iss 1, Pp 1-8 (2022)

Abstract Quantum information encoded into the superposition of coherent states is an illustrative representation of practical applications of macroscopic quantum coherence possessing. However, these states are very sensitive to energy loss, losing th

Externí odkaz: https://doaj.org/article/2743600d615a42519da7eeb44f24fd41

All-optical cat-code quantum error correction

Autor: Jacob Hastrup, Ulrik Lund Andersen

Publikováno v: Physical Review Research, Vol 4, Iss 4, p 043065 (2022)

The cat code is a promising encoding scheme for bosonic quantum error correction as it allows for correction against losses—the dominant error mechanism in most bosonic systems. However, it has remained unclear how the required syndrome measurement

Externí odkaz: https://doaj.org/article/01fd6784869a402eb14b43c0f268fc1e

Measurement-free preparation of grid states

Autor: Radim Filip, Jonatan Bohr Brask, Ulrik L. Andersen, Jacob Hastrup, Kimin Park

Publikováno v: Hastrup, J, Park, K, Brask, J B, Filip, R & Andersen, U L 2021, ' Measurement-free preparation of grid states ', npj Quantum Information, vol. 7, no. 1, 17 . https://doi.org/10.1038/s41534-020-00353-3
npj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021)

Quantum computing potentially offers exponential speed-ups over classical computing for certain tasks. A central, outstanding challenge to making quantum computing practical is to achieve fault tolerance, meaning that computations of any length or si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::737fd73c7e0f3cc8e2b03ae13c8fd0ae
https://doi.org/10.1038/s41534-020-00353-3

Improved readout of qubit-coupled Gottesman-Kitaev-Preskill states

Autor: Ulrik L. Andersen, Jacob Hastrup

Publikováno v: Hastrup, J & Andersen, U L 2021, ' Improved readout of qubit-coupled Gottesman–Kitaev–Preskill states ', Quantum Science and Technology, vol. 6, no. 3, 035016 . https://doi.org/10.1088/2058-9565/ac070d

The Gottesman-Kitaev-Preskill encoding of a qubit in a harmonic oscillator is a promising building block towards fault-tolerant quantum computation. Recently, this encoding was experimentally demonstrated for the first time in trapped-ion and superco

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c608571efca5d4d121627e44c932cf6
http://arxiv.org/abs/2008.10531

Resonant excitation of nanowire quantum dots

Autor: G. E. Cirlin, Lorenzo Leandro, Rodion R. Reznik, Jacob Hastrup, Nika Akopian

Publikováno v: Leandro, L, Hastrup, J, Reznik, R, Cirlin, G & Akopian, N 2020, ' Resonant excitation of nanowire quantum dots ', npj Quantum Information, vol. 6, no. 1 . https://doi.org/10.1038/s41534-020-00323-9

GaAs quantum dots in nanowires are one of the most promising candidates for scalable quantum photonics. They have excellent optical properties, can be frequency-tuned to atomic transitions, and offer a robust platform for fabrication of multi-qubit d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55c6c934ae903f5a24dd03a7d8e79d32
https://orbit.dtu.dk/en/publications/897f3e1f-bb4c-4555-8115-f055fa9f5c72