Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Unitary Coupled Cluster: Seizing the Quantum Moment
I. Magoulas, Francesco A. Evangelista·May 1, 2023
Shallow, CNOT-efficient quantum circuits are crucial for performing accurate computational chemistry simulations on current noisy quantum hardware. Here, we explore the usefulness of noniterative energy corrections, based on the method of moments of ...
Detecting the critical point through entanglement in the Schwinger model
Kazuki Ikeda, D. Kharzeev, R. Meyer +1 more·May 1, 2023
Using quantum simulations on classical hardware, we study the phase diagram of the massive Schwinger model with a $\theta$-term at finite chemical potential $\mu$. We find that the quantum critical point in the phase diagram of the model can be detec...
Codesign of quantum error-correcting codes and modular chiplets in the presence of defects
S. Lin, Joshua Viszlai, Kaitlin N. Smith +4 more·Apr 29, 2023
Fabrication errors pose a significant challenge in scaling up solid-state quantum devices to the sizes required for fault-tolerant (FT) quantum applications. To mitigate the resource overhead caused by fabrication errors, we combine two approaches: (...
Quantum Control Machine: The Limits of Control Flow in Quantum Programming
Charles Yuan, Agnes Villanyi, Michael Carbin·Apr 28, 2023
Quantum algorithms for tasks such as factorization, search, and simulation rely on control flow such as branching and iteration that depends on the value of data in superposition. High-level programming abstractions for control flow, such as switches...
Zero Noise Extrapolation on Logical Qubits by Scaling the Error Correction Code Distance
Misty Wahl, A. Mari, Nathan Shammah +2 more·Apr 28, 2023
In this work, we migrate the quantum error mitigation technique of Zero-Noise Extrapolation (ZNE) to fault-tolerant quantum computing. We employ ZNE on logically encoded qubits rather than physical qubits. This approach will be useful in a regime whe...
Exact and approximate simulation of large quantum circuits on a single GPU
D. Strano, Benn Bollay, Aryan Blaauw +3 more·Apr 28, 2023
We benchmark the performances of Qrack, an open-source software library for the high-performance classical simulation of (gate-model) quantum computers. Qrack simulates, in the Schrödinger picture, the exact quantum state of $n$ qubits evolving under...
Quantum Computing Applications for Flight Trajectory Optimization
Henry Makhanov, Kanav Setia, Junyu Liu +2 more·Apr 27, 2023
Major players in the global aerospace industry are shifting their focus toward achieving net carbon-neutral operations by 2050. A considerable portion of the overall carbon emission reduction is expected to come from new aircraft technologies, such a...
Classical chaos in quantum computers
Simon-Dominik Börner, C. Berke, D. DiVincenzo +2 more·Apr 27, 2023
The development of quantum computing hardware is facing the challenge that current-day quantum processors, comprising 50–100 qubits, already operate outside the range of quantum simulation on classical computers. In this paper we demonstrate that the...
Avoiding barren plateaus in the variational determination of geometric entanglement
L. Zambrano, A. Muñoz-Moller, M. Muñoz +2 more·Apr 26, 2023
The barren plateau (BP) phenomenon is one of the main obstacles to implementing variational quantum algorithms in the current generation of quantum processors. Here, we introduce a method capable of avoiding the BP phenomenon in the variational deter...
Recursive Quantum Eigenvalue/Singular-Value Transformation: Analytic Construction of Matrix Sign Function by Newton Iteration
Kaoru Mizuta, K. Fujii·Apr 26, 2023
Quantum eigenvalue transformation (QET) and its generalization, quantum singular value transformation (QSVT), are versatile quantum algorithms that allow us to apply broad matrix functions to quantum states, which cover many of significant quantum al...
Fully-Passive Twin-Field Quantum Key Distribution
Wenyuan Wang, Rong Wang, H. F. Chau +1 more·Apr 24, 2023
We propose a fully passive twin-field quantum key distribution (QKD) setup where basis choice, decoy-state preparation and encoding are all implemented entirely by post-processing without any active modulation. Our protocol can remove the potential s...
Shot Optimization in Quantum Machine Learning Architectures to Accelerate Training
Koustubh Phalak, Swaroop Ghosh·Apr 21, 2023
Quantum Machine Learning (QML) has recently emerged as a rapidly growing domain as an intersection of Quantum Computing (QC) and Machine Learning (ML) fields. Hybrid quantum-classical models have demonstrated exponential speedups in various machine l...
Real-time simulations of transmon systems with time-dependent Hamiltonian models
H. Lagemann·Apr 21, 2023
In this thesis we study aspects of Hamiltonian models which can affect the time evolution of transmon systems. We model the time evolution of various systems as a unitary real-time process by numerically solving the time-dependent Schr\"odinger equat...
Quantum Algorithmic Gate-Based Computing: Grover Quantum Search Algorithm Design in Quantum Software Engineering
S. Ulyanov, V. Ulyanov·Apr 20, 2023
The difference between classical and quantum algorithms (QA) is following: problem solved by QA is coded in the structure of the quantum operators. Input to QA in this case is always the same. Output of QA says which problem coded. In some sense, giv...
An Analysis of the Completion Time of the BB84 Protocol
Sounak Kar, J. L. Boudec·Apr 20, 2023
The BB84 QKD protocol is based on the idea that the sender and the receiver can reconcile a certain fraction of the teleported qubits to detect eavesdropping or noise and decode the rest to use as a private key. Under the present hardware infrastruct...
Anderson impurity solver integrating tensor network methods with quantum computing
François Jamet, Connor Lenihan, Lachlan P. Lindoy +4 more·Apr 13, 2023
Solving the Anderson impurity model typically involves a two-step process, where one first calculates the ground state of the Hamiltonian and then computes its dynamical properties to obtain Green’s function. Here, we propose a hybrid classical/quant...
High-fidelity dimer excitations using quantum hardware
N. Eassa, J. Gibbs, Zoe Holmes +7 more·Apr 12, 2023
Many-body entangled quantum spin systems exhibit emergent phenomena such as topological quantum spin liquids with distinct excitation spectra accessed in inelastic neutron scattering (INS) experiments. Here we simulate the dynamics of a quantum spin ...
CMOS plus stochastic nanomagnets enabling heterogeneous computers for probabilistic inference and learning
Keito Kobayashi, N. Singh, Qixuan Cao +8 more·Apr 12, 2023
Extending Moore’s law by augmenting complementary-metal-oxide semiconductor (CMOS) transistors with emerging nanotechnologies (X) has become increasingly important. One important class of problems involve sampling-based Monte Carlo algorithms used in...
Ensemble fluid simulations on quantum computers
S. Succi, Wael Itani, K. Sreenivasan +1 more·Apr 11, 2023
We discuss the viability of ensemble simulations of fluid flows on quantum computers. The basic idea is to formulate a functional Liouville equation for the probability distribution of the flow field configuration and recognize that, due to its linea...
High-fidelity parallel entangling gates on a neutral-atom quantum computer
S. Evered, D. Bluvstein, M. Kalinowski +12 more·Apr 11, 2023
The ability to perform entangling quantum operations with low error rates in a scalable fashion is a central element of useful quantum information processing^ 1 . Neutral-atom arrays have recently emerged as a promising quantum computing platform, fe...