Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Single-shot error mitigation by coherent Pauli checks
Ewout van den Berg, S. Bravyi, J. Gambetta +3 more·Dec 7, 2022
Generating samples from the output distribution of a quantum circuit is a ubiquitous task used as a building block of many quantum algorithms. Here we show how to accomplish this task on a noisy quantum processor lacking full-blown error correction f...
Controlling photon polarisation with a single quantum dot spin
E. Mehdi, Manuel Gundin-Martinez, C. Millet +9 more·Dec 7, 2022
In the framework of optical quantum computing and communications, a major objective consists in building receiving nodes that implement conditional operations on incoming photons, using the interaction with a single stationary qubit. In particular, t...
The ribbon category framework for topological quantum computing
Willie Aboumrad·Dec 6, 2022
. This expository article supplies the mathematical background underpinning the braid representation calculator introduced in [ Abo22]; those representations describe the sets of logic gates available to a topological quantum computer for processing ...
Generation of Perfectly Entangled Two and Three Qubits States by Classical Random Interaction
Javed Akram·Dec 6, 2022
This study examines the possibility of finding perfect entanglers for a Hamiltonian which corresponds to several quantum information platforms of interest at the present time. However, in this study, a superconducting circuit is used that stands out ...
Orbital-optimized pair-correlated electron simulations on trapped-ion quantum computers
Luning Zhao, J. Goings, Kyujin Shin +8 more·Dec 5, 2022
Variational quantum eigensolvers (VQE) are among the most promising approaches for solving electronic structure problems on near-term quantum computers. A critical challenge for VQE in practice is that one needs to strike a balance between the expres...
Automatic Depth-Optimized Quantum Circuit Synthesis for Diagonal Unitary Matrices with Asymptotically Optimal Gate Count
Shihao Zhang, Kai Huang, Lvzhou Li·Dec 2, 2022
Current noisy intermediate-scale quantum (NISQ) devices can only execute small circuits with shallow depth, as they are still constrained by the presence of noise: quantum gates have error rates and quantum states are fragile due to decoherence. Henc...
Bespoke pulse design for robust rapid two-qubit gates with trapped ions
Seyed Shakib Vedaie, Eduardo J. P'aez, N. Nguyen +2 more·Dec 1, 2022
Two-qubit gate performance is vital for scaling up ion-trap quantum computing. Optimized quantum control is needed to achieve reductions in gate-time and gate error-rate. We describe two-qubit gates with addressed Raman beams within a linear trapped-...
SyReC Synthesizer: An MQT tool for synthesis of reversible circuits
Smaran Adarsh, Lukas Burgholzer, T. Manjunath +1 more·Dec 1, 2022
Reversible circuits form the backbone for many promising emerging technologies such as quantum computing, low power/adiabatic design, encoder/decoder devices, and several other applications. In the recent years, the scalable synthesis of such circuit...
Hybrid Gate-Pulse Model for Variational Quantum Algorithms
Zhiding Liang, Zhixin Song, Jinglei Cheng +8 more·Dec 1, 2022
Current quantum programs are mostly synthesized and compiled on the gate-level, where quantum circuits are composed of quantum gates. The gate-level workflow, however, introduces significant redundancy when quantum gates are eventually transformed in...
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...
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...