Qudits and high-dimensional quantum computing

Y Wang, Z Hu, BC Sanders, S Kais - Frontiers in Physics, 2020‏ - frontiersin.org
Qudit is a multi-level computational unit alternative to the conventional 2-level qubit.
Compared to qubit, qudit provides a larger state space to store and process information, and …

Realizing quantum gates with optically addressable ion qudits

MA Aksenov, IV Zalivako, IA Semerikov, AS Borisenko… - Physical Review A, 2023‏ - APS
The use of multilevel information carriers, also known as qudits, is a promising path for
exploring scalability of quantum computing devices. Here we present a proof-of-principle …

Multiclass classification using quantum convolutional neural networks with hybrid quantum-classical learning

D Bokhan, AS Mastiukova, AS Boev… - Frontiers in …, 2022‏ - frontiersin.org
Multiclass classification is of great interest for various applications, for example, it is a
common task in computer vision, where one needs to categorize an image into three or …

Autoregressive neural network for simulating open quantum systems via a probabilistic formulation

D Luo, Z Chen, J Carrasquilla, BK Clark - Physical review letters, 2022‏ - APS
The theory of open quantum systems lays the foundation for a substantial part of modern
research in quantum science and engineering. Rooted in the dimensionality of their …

Experimental realization of two qutrits gate with tunable coupling in superconducting circuits

K Luo, W Huang, Z Tao, L Zhang, Y Zhou, J Chu… - Physical Review Letters, 2023‏ - APS
Gate-based quantum computation has been extensively investigated using quantum circuits
based on qubits. In many cases, such qubits are actually made out of multilevel systems but …

Error-detected three-photon hyperparallel Toffoli gate with state-selective reflection

YM Wu, G Fan, FF Du - Frontiers of Physics, 2022‏ - Springer
We present an error-detected hyperparallel Toffoli (hyper-Toffoli) gate for a three-photon
system based on the interface between polarized photon and cavity-nitrogen-vacancy (NV) …

Demonstration of a parity-time-symmetry-breaking phase transition using superconducting and trapped-ion qutrits

AS Kazmina, IV Zalivako, AS Borisenko, NA Nemkov… - Physical Review A, 2024‏ - APS
Scalable quantum computers hold the promise to solve hard computational problems, such
as prime factorization, combinatorial optimization, simulation of many-body physics, and …

Decomposing the generalized Toffoli gate with qutrits

AS Nikolaeva, EO Kiktenko, AK Fedorov - Physical review A, 2022‏ - APS
The problem of finding efficient decompositions of multiqubit gates is of importance for
quantum computing, especially, in application to existing noisy intermediate-scale quantum …

Modular tunable coupler for superconducting circuits

DL Campbell, A Kamal, L Ranzani, M Senatore… - Physical Review …, 2023‏ - APS
The development of modular and versatile quantum interconnect hardware is a key next
step in the scaling of quantum information platforms to larger size and greater functionality …

Toward the continuum limit of a quantum link Schwinger model

TV Zache, M Van Damme, JC Halimeh, P Hauke… - Physical Review D, 2022‏ - APS
The solution of gauge theories is one of the most promising applications of quantum
technologies. Here, we discuss the approach to the continuum limit for U (1) gauge theories …