Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Darmawan, Andrew"'
We study unitary and state $t$-designs from a computational complexity theory perspective. First, we address the problems of computing frame potentials that characterize (approximate) $t$-designs. We provide a quantum algorithm for computing the fram
Externí odkaz:
http://arxiv.org/abs/2410.23353
Autor:
Darmawan, Andrew S.
Information obtained from noise characterization of a quantum device can be used in classical decoding algorithms to improve the performance of quantum error-correcting codes. Focusing on the surface code under local (i.e. single-qubit) noise, we pre
Externí odkaz:
http://arxiv.org/abs/2403.08706
Leakage errors, in which a qubit is excited to a level outside the qubit subspace, represent a significant obstacle in the development of robust quantum computers. We present a computationally efficient simulation methodology for studying leakage err
Externí odkaz:
http://arxiv.org/abs/2308.08186
Publikováno v:
Phys. Rev. Research 6, 023055 (2024)
Recent work [M. J. Gullans et al., Physical Review X, 11(3):031066 (2021)] has shown that quantum error correcting codes defined by random Clifford encoding circuits can achieve a non-zero encoding rate in correcting errors even if the random circuit
Externí odkaz:
http://arxiv.org/abs/2212.05071
Publikováno v:
Phys. Rev. A 105, 052410 (2022)
Magic state distillation is a resource intensive subroutine that consumes noisy input states to produce high-fidelity resource states that are used to perform logical operations in practical quantum-computing architectures. The resource cost of magic
Externí odkaz:
http://arxiv.org/abs/2109.02677
Publikováno v:
PRX Quantum 2, 030345 (2021)
The development of robust architectures capable of large-scale fault-tolerant quantum computation should consider both their quantum error-correcting codes, and the underlying physical qubits upon which they are built, in tandem. Following this desig
Externí odkaz:
http://arxiv.org/abs/2104.09539
Autor:
Tuckett, David K., Darmawan, Andrew S., Chubb, Christopher T., Bravyi, Sergey, Bartlett, Stephen D., Flammia, Steven T.
Publikováno v:
Phys. Rev. X 9, 041031 (2019)
The surface code, with a simple modification, exhibits ultra-high error correction thresholds when the noise is biased towards dephasing. Here, we identify features of the surface code responsible for these ultra-high thresholds. We provide strong ev
Externí odkaz:
http://arxiv.org/abs/1812.08186
Publikováno v:
Phys. Rev. B 98, 205132 (2018)
The long-studied Hubbard model is one of the simplest models of copper-oxide superconductors. However, the connection between the model and the experimental phase diagram is still under debate, in particular regarding the existence and extent of the
Externí odkaz:
http://arxiv.org/abs/1808.06327
Autor:
Darmawan, Andrew S., Poulin, David
Publikováno v:
Phys. Rev. E 97, 051302 (2018)
A quantum error correcting protocol can be substantially improved by taking into account features of the physical noise process. We present an efficient decoder for the surface code which can account for general noise features, including coherences a
Externí odkaz:
http://arxiv.org/abs/1801.01879
Publikováno v:
Phys. Rev. B 96, 205152 (2017)
We develop a machine learning method to construct accurate ground-state wave functions of strongly interacting and entangled quantum spin as well as fermionic models on lattices. A restricted Boltzmann machine algorithm in the form of an artificial n
Externí odkaz:
http://arxiv.org/abs/1709.06475