Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Fratus, Keith R."'
When modeling the effects of noise on quantum circuits, one often makes the assumption that these effects can be accounted for by individual decoherence events following an otherwise noise-free gate. In this work, we address the validity of this mode
Externí odkaz:
http://arxiv.org/abs/2311.00135
Autor:
Leppäkangas, Juha, Vogt, Nicolas, Fratus, Keith R., Bark, Kirsten, Vaitkus, Jesse A., Stadler, Pascal, Reiner, Jan-Michael, Zanker, Sebastian, Marthaler, Michael
Publikováno v:
Phys. Rev. A 108, 062424 (2023)
In this paper we present a quantum algorithm that uses noise as a resource. The goal of our quantum algorithm is the calculation of operator averages of an open quantum system evolving in time. Selected low-noise system qubits and noisy bath qubits r
Externí odkaz:
http://arxiv.org/abs/2210.12138
Autor:
Fratus, Keith R., Bark, Kirsten, Vogt, Nicolas, Leppäkangas, Juha, Zanker, Sebastian, Marthaler, Michael, Reiner, Jan-Michael
We consider the extent to which a noisy quantum computer is able to simulate the time evolution of a quantum spin system in a faithful manner. Given a specific set of assumptions regarding the manner in which noise acting on such a device can be mode
Externí odkaz:
http://arxiv.org/abs/2210.11371
Autor:
Gold, Carolin, Bräm, Beat A., Ferguson, Michael S., Krähenmann, Tobias, Hofmann, Andrea, Steinacher, Richard, Fratus, Keith R., Reichl, Christian, Wegscheider, Werner, Weinmann, Dietmar, Ensslin, Klaus, Ihn, Thomas
Publikováno v:
Phys. Rev. Research 3, 032005 (2021)
We use Scanning Gate Microscopy to study electron transport through an open, gate-defined resonator in a Ga(Al)As heterostructure. Raster-scanning the voltage-biased metallic tip above the resonator, we observe distinct conductance modulations as a f
Externí odkaz:
http://arxiv.org/abs/2011.13869
Autor:
Fratus, Keith R., Calonnec, Camille Le, Jalabert, Rodolfo A., Weick, Guillaume, Weinmann, Dietmar
Publikováno v:
SciPost Phys. 10, 069 (2021)
We demonstrate the emergence of classical features in electronic quantum transport for the scanning gate microscopy response in a cavity defined by a quantum point contact and a micron-sized circular reflector. The branches in electronic flow charact
Externí odkaz:
http://arxiv.org/abs/2010.12409
Publikováno v:
Phys. Rev. B 100, 155435 (2019)
The branched pattern typically observed through the scanning gate microscopy (SGM) of two dimensional electron gases in the presence of weak, smooth disorder has recently been found to be robust against a very large shift in the Fermi energy of the e
Externí odkaz:
http://arxiv.org/abs/1904.07777
Autor:
Fratus, Keith R., Truong, Syrian V.
Recent work on the subject of isolated quantum thermalization has suggested that an individual energy eigenstate of a non-integrable quantum system may encode a significant amount of information about that system's Hamiltonian. We provide a theoretic
Externí odkaz:
http://arxiv.org/abs/1810.11092
Autor:
Fratus, Keith R., Srednicki, Mark
We study eigenstate thermalization and related signatures of quantum chaos in the one-dimensional ferromagnetic transverse-field Ising model with power-law interactions. The presence of long-range interactions allows for a finite-temperature phase tr
Externí odkaz:
http://arxiv.org/abs/1611.03992
Publikováno v:
Phys. Rev. E 93, 032104 (2016)
We study the onset of eigenstate thermalization in the two-dimensional transverse field Ising model (2D-TFIM) in the square lattice. We consider two non-equivalent Hamiltonians: the ferromagnetic 2D-TFIM and the antiferromagnetic 2D-TFIM in the prese
Externí odkaz:
http://arxiv.org/abs/1512.04947
Autor:
Fratus, Keith R., Srednicki, Mark
Publikováno v:
Phys. Rev. E 92, 040103 (2015)
A strongly non-integrable system is expected to satisfy the eigenstate thermalization hypothesis, which states that the expectation value of an observable in an energy eigenstate is the same as the thermal value. This must be revised if the observabl
Externí odkaz:
http://arxiv.org/abs/1505.04206