Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum search in a non-Markovian environment
Sheikh Parvez Mandal·Mar 23, 2023
This MS thesis explores the effects and origins of a 'noise with memory' in the dynamics of an open quantum system. The system considered here is a multi-qubit register performing the Grover's quantum search algorithm. We show that a Markovian-correl...
Partially Fault-Tolerant Quantum Computing Architecture with Error-Corrected Clifford Gates and Space-Time Efficient Analog Rotations
Yutaro Akahoshi, Kazunori Maruyama, H. Oshima +2 more·Mar 23, 2023
Quantum computers are expected to bring drastic acceleration to several computing tasks against classical computers. Noisy intermediate-scale quantum (NISQ) devices, which have tens to hundreds of noisy physical qubits, are gradually becoming availab...
All this for one qubit? Bounds on local circuit cutting schemes
Simon Marshall, Jordi Tura i Brugués, V. Dunjko·Mar 23, 2023
Small numbers of qubits are one of the primary constraints on the near-term deployment of advantageous quantum computing. To mitigate this constraint, techniques have been developed to break up a large quantum computation into smaller computations. W...
Particle track reconstruction with noisy intermediate-scale quantum computers
Tim Schwagerl, C. Issever, K. Jansen +4 more·Mar 23, 2023
The reconstruction of trajectories of charged particles is a key computational challenge for current and future collider experiments. Considering the rapid progress in quantum computing, it is crucial to explore its potential for this and other probl...
One-step implementation of a multi-target-qubit controlled-phase gate with photonic qubits encoded via eigenstates of the photon-number parity operator
Qi-Ping Su, Liang Bin, Yu Zhang +1 more·Mar 23, 2023
In recent years, quantum state engineering and quantum information processing using microwave fields and photons have received increasing attention. In addition, multiqubit gates play an important role in quantum information processing. In this work,...
Consistent Quantum Causes
R. Griffiths·Mar 23, 2023
Developing a quantum analog of the modern classical theory of causation, as formulated by Pearl and others using directed acyclic graphs, requires a theory of random or stochastic time development at the microscopic level, where the noncommutation of...
GSQAS: Graph Self-supervised Quantum Architecture Search
Zhimin He, Maijie Deng, Shenggen Zheng +2 more·Mar 22, 2023
Quantum Architecture Search (QAS) is a promising approach to designing quantum circuits for variational quantum algorithms (VQAs). However, existing QAS algorithms require to evaluate a large number of quantum circuits during the search process, whic...
Quantum computing of analytical functions by linear optics methods
M. Podoshvedov, S. Podoshvedov·Mar 22, 2023
We propose a model for computing of a certain set of analytical functions based on estimating the output distribution of multiphoton outcomes in an optical scheme with an initial single-mode squeezed vacuum (SMSV) state and photonic states measuring ...
A real-world test of portfolio optimization with quantum annealing
W. Sakuler, J. Oberreuter, Riccardo Aiolfi +3 more·Mar 22, 2023
In this note, we describe an experiment on portfolio optimization using the Quadratic Unconstrained Binary Optimization (QUBO) formulation. The dataset we use is taken from a real-world problem for which a classical solution is currently deployed and...
Experimental Implementation of Short-Path Nonadiabatic Geometric Gates in a Superconducting Circuit
Xinxin Yang, Liang-Liang Guo, Haifeng Zhang +8 more·Mar 22, 2023
The non-adiabatic geometric quantum computation (NGQC) has attracted a lot of attention for noise-resilient quantum control. However, previous implementations of NGQC require long evolution paths that make them more vulnerable to incoherent errors th...
Variational quantum time evolution without the quantum geometric tensor
Julien Gacon, J. Nys, R. Rossi +2 more·Mar 22, 2023
The real- and imaginary-time evolution of quantum states are powerful tools in physics, chemistry, and beyond, to investigate quantum dynamics, prepare ground states or calculate thermodynamic observables. On near-term devices, variational quantum ti...
Magnetic tuning of the tunnel coupling in an optically active quantum dot molecule
F. Bopp, Charlotte Cullip, C. Thalacker +15 more·Mar 22, 2023
Self-assembled optically active quantum dot molecules (QDMs) allow the creation of protected qubits via singlet-triplet spin states. The qubit energy splitting of these states is defined by the tunnel coupling strength and is, therefore, determined b...
Dissipative ground state preparation and the Dissipative Quantum Eigensolver
T. Cubitt·Mar 21, 2023
For any local Hamiltonian H, I construct a local CPT map and stopping condition which converges to the ground state subspace of H. Like any ground state preparation algorithm, this algorithm necessarily has exponential run-time in general (otherwise ...
The quantum detection of projectors in finite-dimensional algebras and holography
J. B. Geloun, S. Ramgoolam·Mar 21, 2023
We define the computational task of detecting projectors in finite dimensional associative algebras with a combinatorial basis, labelled by representation theory data, using combinatorial central elements in the algebra. In the first example, the pro...
Using Differential Evolution to avoid local minima in Variational Quantum Algorithms
Daniel Faílde, José Daniel Viqueira, Mariamo Mussa Juane +1 more·Mar 21, 2023
Variational Quantum Algorithms (VQAs) are among the most promising NISQ-era algorithms for harnessing quantum computing in diverse fields. However, the underlying optimization processes within these algorithms usually deal with local minima and barre...
Resource-Dependent Complexity of Quantum Channels
Roy Araiza, Yidong Chen, Marius Junge +1 more·Mar 20, 2023
We introduce a new framework for quantifying the complexity of quantum channels, grounded in a suitably chosen resource set. This class of convex functions is designed to analyze the complexity of both open and closed quantum systems. By leveraging L...
Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
R. Wolf, Joseph H. Pham, Julian Y. Z. Jee +2 more·Mar 20, 2023
Resolving the locations and discriminating the spin states of individual trapped ions with high fidelity is critical for a large class of applications in quantum computing, simulation, and sensing. We report on a method for high-fidelity state discri...
On the exact quantum query complexity of $\text{MOD}_m^n$ and $\text{EXACT}_{k,l}^n$
Penghui Yao, Zekun Ye·Mar 20, 2023
The query model has generated considerable interest in both classical and quantum computing communities. Typically, quantum advantages are demonstrated by showcasing a quantum algorithm with a better query complexity compared to its classical counter...
Variational Gibbs state preparation on noisy intermediate-scale quantum devices
M. Consiglio, J. Settino, Andrea Giordano +6 more·Mar 20, 2023
The preparation of an equilibrium thermal state of a quantum many-body system on noisy intermediate-scale quantum (NISQ) devices is an important task in order to extend the range of applications of quantum computation. Faithful Gibbs state preparatio...
Opening the Black Box inside Grover’s Algorithm
E. Stoudenmire, X. Waintal·Mar 20, 2023
Grover’s algorithm is one of the primary algorithms offered as evidence that quantum computers can provide an advantage over classical computers. It involves an “oracle” (external quantum subroutine), which must be specified for a given application a...