Zobrazeno 1 - 10
of 4 444
pro vyhledávání: '"P Kretschmer"'
Autor:
Debus, Sebastian, Kretschmer, Andreas
A symmetric ideal is an ideal in a polynomial ring which is stable under all permutations of the variables. In this paper we initiate a global study of zero-dimensional symmetric ideals. By this we mean a geometric study of the invariant Hilbert sche
Externí odkaz:
http://arxiv.org/abs/2404.15240
We define a quantum learning task called agnostic tomography, where given copies of an arbitrary state $\rho$ and a class of quantum states $\mathcal{C}$, the goal is to output a succinct description of a state that approximates $\rho$ at least as we
Externí odkaz:
http://arxiv.org/abs/2404.03813
We show that any pseudoentangled state ensemble with a gap of $t$ bits of entropy requires $\Omega(t)$ non-Clifford gates to prepare. This bound is tight up to polylogarithmic factors if linear-time quantum-secure pseudorandom functions exist. Our re
Externí odkaz:
http://arxiv.org/abs/2404.00126
Autor:
Spuler, Fiona Raphaela, Kretschmer, Marlene, Kovalchuk, Yevgeniya, Balmaseda, Magdalena Alonso, Shepherd, Theodore G.
Weather regimes are recurrent and persistent large-scale atmospheric circulation patterns that modulate the occurrence of local impact variables such as extreme precipitation. In their capacity as mediators between long-range teleconnections and thes
Externí odkaz:
http://arxiv.org/abs/2402.15379
Autor:
Materia, Stefano, García, Lluís Palma, van Straaten, Chiem, O, Sungmin, Mamalakis, Antonios, Cavicchia, Leone, Coumou, Dim, De Luca, Paolo, Kretschmer, Marlene, Donat, Markus G.
Scientific and technological advances in numerical modelling have improved the quality of climate predictions over recent decades, but predictive skill remains limited in many aspects. Extreme events such as heat and cold waves, droughts, heavy rain
Externí odkaz:
http://arxiv.org/abs/2310.01944
Recent work has shown that $n$-qubit quantum states output by circuits with at most $t$ single-qubit non-Clifford gates can be learned to trace distance $\epsilon$ using $\mathsf{poly}(n,2^t,1/\epsilon)$ time and samples. All prior algorithms achievi
Externí odkaz:
http://arxiv.org/abs/2308.07175
Autor:
Guilherme Mota Souza, Rafael Kretschmer, Gustavo Akira Toma, Alan Moura de Oliveira, Geize Aparecida Deon, Princia Grejo Setti, Rodrigo Zeni dos Santos, Caio Augusto Gomes Goes, Analía Del Valle Garnero, Ricardo José Gunski, Edivaldo Herculano Correa de Oliveira, Fabio Porto-Foresti, Thomas Liehr, Ricardo Utsunomia, Marcelo de Bello Cioffi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract Do all birds' sex chromosomes follow the same canonical one-way direction of evolution? We combined cytogenetic and genomic approaches to analyze the process of the W chromosomal differentiation in two selected Passeriform species, named the
Externí odkaz:
https://doaj.org/article/e474b28cb3fa42ec925371a425eb8391
Autor:
Gustavo Akira Toma, Alexandr Sember, Caio Augusto Gomes Goes, Rafael Kretschmer, Fabio Porto-Foresti, Luiz Antônio Carlos Bertollo, Thomas Liehr, Ricardo Utsunomia, Marcelo de Bello Cioffi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract Multiple sex chromosomes usually arise from chromosomal rearrangements which involve ancestral sex chromosomes. There is a fundamental condition to be met for their long-term fixation: the meiosis must function, leading to the stability of t
Externí odkaz:
https://doaj.org/article/f16eff82e0e94f75ab7c3c824730a26f
Publikováno v:
Scientific Data, Vol 11, Iss 1, Pp 1-11 (2024)
Abstract The permeability of aquifers strongly influences groundwater flow characteristics. Worldwide, coastal groundwater is often the primary freshwater source for coastal communities and ecosystems but is also particularly vulnerable to abstractio
Externí odkaz:
https://doaj.org/article/12c610ea9cfa43e0afcffe6a7ac0fcc1
We give a pair of algorithms that efficiently learn a quantum state prepared by Clifford gates and $O(\log n)$ non-Clifford gates. Specifically, for an $n$-qubit state $|\psi\rangle$ prepared with at most $t$ non-Clifford gates, our algorithms use $\
Externí odkaz:
http://arxiv.org/abs/2305.13409