Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Error-Resilience Phase Transitions in Encoding-Decoding Quantum Circuits.
X. Turkeshi, P. Sierant·Aug 11, 2023
Understanding how errors deteriorate the information encoded in a many-body quantum system is a fundamental problem with practical implications for quantum technologies. Here, we investigate a class of encoding-decoding random circuits subject to loc...
Test Case Minimization with Quantum Annealers
Xinyi Wang, Asmar Muqeet, T. Yue +4 more·Aug 10, 2023
Quantum annealers are specialized quantum computers for solving combinatorial optimization problems with special quantum computing characteristics, e.g., superposition and entanglement. Theoretically, quantum annealers can outperform classic computer...
Universal imaginary-time critical dynamics on a quantum computer
Shenmin Zhang, Shuai Yin·Aug 10, 2023
Quantum computers promise a highly efficient approach to investigate quantum phase transitions, which describe abrupt changes between different ground states of many-body systems. At quantum critical points, the divergent correlation length and entan...
Protocols to measure the non-Abelian Berry phase by pumping a spin qubit through a quantum-dot loop
Baksa Kolok, Andr'as P'alyi·Aug 10, 2023
A quantum system constrained to a degenerate energy eigenspace can undergo a nontrival time evolution upon adiabatic driving, described by a non-Abelian Berry phase. This type of dynamics may provide logical gates in quantum computing that are robust...
Fault Tolerant Quantum Error Mitigation
Alvin Gonzales, Anjala M. Babu, Ji Liu +2 more·Aug 10, 2023
Typically, fault-tolerant operations and code concatenation are reserved for quantum error correction due to their resource overhead. Here, we show that fault tolerant operations have a large impact on the performance of symmetry based error mitigati...
Teleamplification on the Borealis boson-sampling device
A. Goldberg, K. Heshami·Aug 10, 2023
A recent theoretical proposal for teleamplification requires preparation of Fock states, programmable interferometers, and photon-number resolving detectors to herald the teleamplification of an input state. These enable teleportation and heralded no...
Fast and converged classical simulations of evidence for the utility of quantum computing before fault tolerance
Tomislav Begušić, Johnnie Gray, G. Chan·Aug 9, 2023
A recent quantum simulation of observables of the kicked Ising model on 127 qubits implemented circuits that exceed the capabilities of exact classical simulation. We show that several approximate classical methods, based on sparse Pauli dynamics and...
On the Pauli group on 2-qubits in dynamical systems with pseudofermions
F. Bagarello, Yanga Bavuma, Francesco G. Russo·Aug 9, 2023
Abstract The group of matrices P 1 {P_{1}} of Pauli is a finite 2-group of order 16 and plays a fundamental role in quantum information theory, since it is related to the quantum information on the 1-qubit. Here we show that both P 1 {P_{1}} and the ...
Randomness-Enhanced Expressivity of Quantum Neural Networks.
Yadong Wu, Juan Yao, P. Zhang +1 more·Aug 9, 2023
As a hybrid of artificial intelligence and quantum computing, quantum neural networks (QNNs) have gained significant attention as a promising application on near-term, noisy intermediate-scale quantum devices. Conventional QNNs are described by param...
Benchmarking a trapped-ion quantum computer with 30 qubits
Jwo-Sy Chen, E. Nielsen, M. Ebert +8 more·Aug 9, 2023
Quantum computers are rapidly becoming more capable, with dramatic increases in both qubit count \cite{kim2023evidence} and quality \cite{moses2023race}. Among different hardware approaches, trapped-ion quantum processors are a leading technology for...
Quantum Lego Expansion Pack: Enumerators from Tensor Networks
ChunJun Cao, M. Gullans, Brad Lackey +1 more·Aug 9, 2023
We provide the first tensor-network method for computing quantum weight enumerator polynomials in the most general form. If a quantum code has a known tensor-network construction of its encoding map, our method is far more efficient, and in some case...
Fuzzy gauge theory for quantum computers
A. Alexandru, P. Bedaque, A. Carosso +3 more·Aug 9, 2023
Continuous gauge theories, because of their bosonic degrees of freedom, have an infinite-dimensional local Hilbert space. Encoding these degrees of freedom on qubit-based hardware demands some sort of ``qubitization'' scheme, where one approximates t...
Large-Scale Simulation of Shor’s Quantum Factoring Algorithm
D. Willsch, M. Willsch, F. Jin +2 more·Aug 9, 2023
Shor’s factoring algorithm is one of the most anticipated applications of quantum computing. However, the limited capabilities of today’s quantum computers only permit a study of Shor’s algorithm for very small numbers. Here, we show how large GPU-ba...
Beyond trace class -- Tensor products of Hilbert spaces and operator ideals in quantum physics
Frank Oertel·Aug 8, 2023
Starting from the meaning of the conjugate of a complex Hilbert space, including a related application of the theorem of Fréchet-Riesz (by which an analysis of semilinear operators can be reduced to - linear - operator theory) to a revisit of applica...
Finding optimal pathways in chemical reaction networks using Ising machines
Yutaka Mizuno, T. Komatsuzaki·Aug 8, 2023
Finding optimal pathways in chemical reaction networks is essential for elucidating and designing chemical processes, with significant applications such as synthesis planning and metabolic pathway analysis. Such a chemical pathway-finding problem can...
High-Photon-Loss Threshold Quantum Computing Using GHZ-State Measurements.
B. Pankovich, A. Kan, Kwok Ho Wan +5 more·Aug 8, 2023
We propose fault-tolerant architectures based on performing projective measurements in the Greenberger-Horne-Zeilinger (GHZ) basis on constant-sized, entangled resource states. We present linear-optical constructions of the architectures, where the G...
Quantum gate algorithm for reference-guided DNA sequence alignment
Georgios D. Varsamis, Ioannis G. Karafyllidis, K. Gilkes +8 more·Aug 8, 2023
Reference-guided DNA sequencing and alignment is an important process in computational molecular biology. The amount of DNA data grows very fast, and many new genomes are waiting to be sequenced while millions of private genomes need to be re-sequenc...
Wavefunction branching: when you can't tell pure states from mixed states
Jordan K. Taylor, I. McCulloch·Aug 8, 2023
We propose a definition of wavefunction "branchings": quantum superpositions which can't be feasibly distinguished from the corresponding mixed state, even under time evolution. Our definition is largely independent of interpretations, requiring only...
Application-Oriented Benchmarking of Quantum Generative Learning Using QUARK
Florian J. Kiwit, M. Marso, Philipp Ross +3 more·Aug 8, 2023
Benchmarking of quantum machine learning (QML) algorithms is challenging due to the complexity and variability of QML systems, e. g., regarding model ansatzes, data sets, training techniques, and hyper-parameter selection. The QUantum computing Appli...
Scalable Circuits for Preparing Ground States on Digital Quantum Computers: The Schwinger Model Vacuum on 100 Qubits
R. Farrell, Marc Illa, Anthony N. Ciavarella +1 more·Aug 8, 2023
The vacuum of the lattice Schwinger model is prepared on up to 100 qubits of IBM's Eagle-processor quantum computers. A new algorithm to prepare the ground state of a gapped translationally-invariant system on a quantum computer is presented, which w...