Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
QuBOBS, interactive objects and a visual representation to explain quantum computing
Sophie Laplante, Loris Perez, Sylvie Tissot +1 more·Nov 29, 2022
We introduce a visual representation of qubits to assist in explaining quantum computing to a broad audience. The representation follows from physical devices that we developed to explain superposition, entanglement, measurement, phases, interference...
Active volume: An architecture for efficient fault-tolerant quantum computers with limited non-local connections
D. Litinski, Naomi H. Nickerson·Nov 28, 2022
In existing general-purpose architectures for surface-code-based fault-tolerant quantum computers, the cost of a quantum computation is determined by the circuit volume, i.e., the number of qubits multiplied by the number of non-Clifford gates. We in...
Practical quantum simulation of small-scale non-Hermitian dynamics
Hong-fang Liu, Xiaodong Yang, Kai Tang +5 more·Nov 27, 2022
Non-Hermitian quantum systems have recently attracted considerable attention due to their exotic properties. Though many experimental realizations of non-Hermitian systems have been reported, the non-Hermiticity usually resorts to the hard-to-control...
Efficient and fail-safe quantum algorithm for the transport equation
Merel A. Schalkers, Matthias Möller·Nov 25, 2022
We present a scalable algorithm for solving the transport equation in two and three spatial dimensions for variable grid sizes and discrete velocities on a fault-tolerant universal quantum computer. As a proof of concept of our quantum transport meth...
Electrical Control of Uniformity in Quantum Dot Devices
M. Meyer, Corentin D'eprez, Timo R van Abswoude +10 more·Nov 24, 2022
Highly uniform quantum systems are essential for the practical implementation of scalable quantum processors. While quantum dot spin qubits based on semiconductor technology are a promising platform for large-scale quantum computing, their small size...
Approximate complex amplitude encoding algorithm and its application to data classification problems
Naoki Mitsuda, Tatsuhiro Ichimura, Kouhei Nakaji +6 more·Nov 23, 2022
Quantum computing has a potential to accelerate the data processing efficiency, especially in machine learning, by exploiting special features such as the quantum interference. The major challenge in this application is that, in general, the task of ...
End-To-End Resource Analysis for Quantum Interior-Point Methods and Portfolio Optimization
A. Dalzell, B. D. Clader, Grant Salton +8 more·Nov 22, 2022
We study quantum interior point methods (QIPMs) for second-order cone programming (SOCP), guided by the example use case of portfolio optimization (PO). We provide a complete quantum circuit-level description of the algorithm from problem input to pr...
A new twist on the Majorana surface code: Bosonic and fermionic defects for fault-tolerant quantum computation
Campbell McLauchlan, B. B'eri·Nov 21, 2022
Majorana zero modes (MZMs) are promising candidates for topologically-protected quantum computing hardware, however their large-scale use will likely require quantum error correction. Majorana surface codes (MSCs) have been proposed to achieve this. ...
Acceptor-based qubit in silicon with tunable strain
Shihang Zhang, Yu He, Peihao Huang·Nov 18, 2022
Long coherence time and compatibility with semiconductor fabrication make spin qubits in silicon an attractive platform for quantum computing. In recent years, hole spin qubits are being developed as they have the advantages of weak coupling to nucle...
Efficient quantum implementation of 2+1 U(1) lattice gauge theories with Gauss law constraints
Christopher Kane, D. Grabowska, B. Nachman +1 more·Nov 18, 2022
The study of real-time evolution of lattice quantum field theories using classical computers is known to scale exponentially with the number of lattice sites. Due to a fundamentally different computational strategy, quantum computers hold the promise o...
Transversal Injection: A method for direct encoding of ancilla states for non-Clifford gates using stabiliser codes
J. Gavriel, Daniel Herr, Alexis Shaw +3 more·Nov 18, 2022
Fault-tolerant, error-corrected quantum computation is commonly acknowledged to be crucial to the realisation of large-scale quantum algorithms that could lead to extremely impactful scientific or commercial results. Achieving a universal set of quan...
Programmable Heisenberg interactions between Floquet qubits
Long B. Nguyen, Yosep Kim, A. Hashim +9 more·Nov 18, 2022
The trade-off between robustness and tunability is a central challenge in the pursuit of quantum simulation and fault-tolerant quantum computation. In particular, quantum architectures are often designed to achieve high coherence at the expense of tu...
Digital Simulation of Projective Non-Abelian Anyons with 68 Superconducting Qubits
Shibo Xu, Zheng Sun, Ke Wang +31 more·Nov 17, 2022
Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topological phases of matter. They break the fermion-boson dichotomy and obey non-Abelian braiding statistics: their interchanges yield unitary operations, rather than merely a...
On the complexity of implementing Trotter steps
G. Low, Yuan Su, Yu Tong +1 more·Nov 16, 2022
Quantum dynamics can be simulated on a quantum computer by exponentiating elementary terms from the Hamiltonian in a sequential manner. However, such an implementation of Trotter steps has gate complexity depending on the total Hamiltonian term numbe...
All-optical quantum computing using cubic phase gates
Niklas Budinger, A. Furusawa, P. van Loock·Nov 16, 2022
If suitable quantum optical interactions were available, transforming the field mode operators in a nonlinear fashion, the all-photonics platform could be one of the strongest contenders for realizing a quantum computer. While single-photon qubits ma...
Robust quantum control for higher order coupling term in trapped ions
Jing-bo Wang·Nov 15, 2022
Trapped ion hardware has made significant progress recently and is now one of the leading platforms for quantum computing. To construct two-qubit gates in trapped ions, experimental manipulation approaches for ion chains are becoming increasingly pre...
QuDiet: A classical simulation platform for qubit-qudit hybrid quantum systems
Turbasu Chatterjee, Arnav Das, Subhayu Kumar Bala +3 more·Nov 15, 2022
In the recent years, numerous research advancements have extended the limit of classical simulation of quantum algorithms. Although, most of the state-of-the-art classical simulators are only limited to binary quantum systems, which restrict the clas...
Robust Quantum Circuit for Clique Problem with Intermediate Qudits
Arpita Sanyal, A. Saha, Banani Saha +1 more·Nov 15, 2022
Clique problem has a wide range of applications due to its pattern matching ability. There are various formulation of clique problem like $k$-clique problem, maximum clique problem, etc. The $k$-Clique problem, determines whether an arbitrary network...
Time-Dependent Hamiltonian Reconstruction Using Continuous Weak Measurements
K. Siva, G. Koolstra, J. Steinmetz +9 more·Nov 14, 2022
Reconstructing the Hamiltonian of a quantum system is an essential task for characterizing and certifying quantum processors and simulators. Existing techniques either rely on projective measurements of the system before and after coherent time evolu...
Highly optimized quantum circuits synthesized via data-flow engines
P. Rakyta, G. Morse, Jakab N'adori +3 more·Nov 14, 2022
The formulation of quantum programs in terms of the fewest number of gate operations is crucial to retrieve meaningful results from the noisy quantum processors accessible these days. In this work, we demonstrate a use-case for Field Programmable Gat...