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Novel Approaches for Quantum Computing and Quantum Information Processing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Quantum Science and Technology".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 723

Special Issue Editor


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Guest Editor
Department of Informatics, Aristotle University of Thessaloniki, 2310 Thessaloniki, Greece
Interests: quantum computing; quantum technologies; nanoelectronics; optoelectronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The fields of quantum computing and quantum information processing have thoroughly advanced during the last decade due to potential applications in many scientific fields ranging from computer science and communications to biology and AI. Recently developed quantum algorithms are capable of performing better than their classical counterparts; although this was demonstrated decades ago via the work of Deutsch and Shor, it has recently received new attention after the development of algorithms that can perform pattern recognition, machine learning tasks, and computations that involve core aspects of a physical system. These methodologies offer the potential to perform very complex, currently intractable tasks, ranging from computing solutions to the protein folding problem.

As we are currently in the NISQ-era of quantum computation, the development of techniques for encoding information using the minimal number of qubits, the design of hardware-efficient quantum circuits, and the adoption of appropriate noise suppression and mitigation techniques are very important for designing algorithms that can have practical applications in the near future.

In this light, this Special Issue aims to publish work that exhibits novel work regarding both new quantum algorithms and solutions based on new techniques, such as transpilation and custom noise handling, which allow for NISQ-efficient implementations of existing quantum algorithms.

Prof. Dr. Nikos Konofaos
Guest Editor

Manuscript Submission Information

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Keywords

  • quantum computation
  • hardware-efficient quantum circuits
  • quantum algorithms
  • quantum pattern recognition
  • quantum noise suppression

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Published Papers (1 paper)

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Research

21 pages, 926 KiB  
Article
Qutrit Control for Bucket Brigade RAM Using Transmon Systems
by Lazaros Spyridopoulos, Dimitris Ntalaperas and Nikos Konofaos
Appl. Sci. 2025, 15(7), 3950; https://doi.org/10.3390/app15073950 - 3 Apr 2025
Viewed by 236
Abstract
Qudits allow the encoding and manipulation of additional quantum information compared to that stored to a two-level qubit system. Although manipulations of qudit states are generally more complex and can introduce extra sources of noise, qudits can still be used in a number [...] Read more.
Qudits allow the encoding and manipulation of additional quantum information compared to that stored to a two-level qubit system. Although manipulations of qudit states are generally more complex and can introduce extra sources of noise, qudits can still be used in a number of applications when this error can be kept sufficiently low. One such application is the case of the Bucket Brigade Algorithm for realizing a Quantum RAM (QRAM), which inherently uses qutrits for encoding the state of address switches. In this paper, we study a methodology for qutrit manipulation that leverages efficient encoding techniques and pulse calibration methods for the case of transmon systems. The methodology employs an encoding scheme that allows the execution of controlled operations, using the subspace spanned by the two lowest levels of the transmon; we show how this scheme can be used for generating one- and two-qutrit gates by leveraging the Qiskit and Boulder Opal frameworks to compute the parameters of pulses that implement the quantum gates that are used by the BBA. For this type of gate, simulations show that the pulses perform the required operations with a low infidelity when errors introduced by the qutrit Hamiltonian dynamics are considered. Full article
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