Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Randomly Compiled Quantum Simulation with Exponentially Reduced Circuit Depths
J. D. Watson·Nov 6, 2024
The quantum stochastic drift protocol, also known as qDRIFT, has become a popular algorithm for implementing time-evolution of quantum systems using randomised compiling. In this work we develop qFLO, a higher order randomised algorithm for time-evol...
Programming an Optical Lattice Interferometer
L. M. Seifert, V. Colussi, Michael A. Perlin +2 more·Nov 6, 2024
Programming a quantum device describes the usage of quantum logic gates, agnostic of hardware specifics, to perform a sequence of operations with (typically) a computing or sensing task in mind. Such programs have been executed on digital quantum com...
Strong coupling of a superconducting flux qubit to single bismuth donors
Tikai Chang, I. Holzman, Shao Qi Lim +4 more·Nov 5, 2024
The realization of a quantum computer represents a tremendous scientific and technological challenge due to the extreme fragility of quantum information. The physical support of information, namely the quantum bit or qubit, must at the same time be s...
Fourier Analysis of Variational Quantum Circuits for Supervised Learning
Marco Wiedmann, Maniraman Periyasamy, Daniel D. Scherer·Nov 5, 2024
Variational quantum circuits (VQCs) can be understood through the lens of Fourier analysis. The function space represented by any circuit architecture can be described through a truncated Fourier sum. We show that the spectrum available to that trunc...
Polynomial-Time Classical Simulation of Noisy Quantum Circuits with Naturally Fault-Tolerant Gates
Jon Nelson, Joel Rajakumar, Dominik Hangleiter +1 more·Nov 4, 2024
We construct a polynomial-time classical algorithm that samples from the output distribution of noisy geometrically local Clifford circuits with any product-state input and single-qubit measurements in any basis. Our results apply to circuits with ne...
Magic states are rarely the most important resource to optimize
Marco Fellous-Asiani, H. Ng, R. Whitney·Nov 4, 2024
We propose a scaling approach to evaluating the qubit resources required by concatenated fault-tolerant quantum computing. The approach gives closed-form expressions, which remain simple for multiple levels of concatenation, making it an ideal tool t...
Resource-optimized fault-tolerant simulation of the Fermi-Hubbard model and high-temperature superconductor models
A. Kan, Benjamin C. B. Symons·Nov 4, 2024
Exploring low-cost applications is paramount to creating value in early fault-tolerant quantum computers. Here, we optimize both gate and qubit counts of recent algorithms for simulating the Fermi-Hubbard model. We further devise and compile algorith...
Scalable quantum simulations of scattering in scalar field theory on 120 qubits
Nikita A. Zemlevskiy·Nov 4, 2024
Simulations of collisions of fundamental particles on a quantum computer are expected to have an exponential advantage over classical methods and promise to enhance searches for new physics. Furthermore, scattering in scalar field theory has been sho...
Noise-aware circuit compilations for a continuously parameterized two-qubit gateset
Christopher Yale, Rich Rines, V. Omole +9 more·Nov 2, 2024
State-of-the-art noisy-intermediate-scale quantum (NISQ) processors are currently implemented across a variety of hardware platforms, each with their own distinct gatesets. As such, circuit compilation should not only be aware of, but also deeply con...
Low-degree approximation of QAC$^0$ circuits
Ashley Montanaro, Changpeng Shao, Dominic Verdon·Nov 1, 2024
QAC$^0$ is the class of constant-depth quantum circuits with polynomially many ancillary qubits, where Toffoli gates on arbitrarily many qubits are allowed. In this work, we show that the parity function cannot be computed in QAC$^0$, resolving a lon...
Reshaping quantum device noise via repetition code circuits
Yue Ma, Michael Hanks, Evdokia Gneusheva +1 more·Nov 1, 2024
Noise of a quantum processor can be an important resource for simulating open quantum dynamics. However, this requires characterizing the device noise and then transforming it into a target structure. Here, we take the first step toward this goal: We...
Reinforcement learning with learned gadgets to tackle hard quantum problems on real hardware
Akash Kundu, Leopoldo Sarra·Oct 31, 2024
Quantum computing offers exciting opportunities for simulating complex quantum systems and optimizing large scale combinatorial problems, but its practical use is limited by device noise and constrained connectivity. Designing quantum circuits, which...
Comparing the performance of practical two-qubit gates for individual $^{171}$Yb ions in yttrium orthovanadate
Mahsa Karimi, Faezeh Kimiaee Asadi, Stephen C. Wein +1 more·Oct 31, 2024
In this paper, we investigate three schemes for implementing Controlled-Z (CZ) gates between individual ytterbium (Yb) rare-earth ions doped into yttrium orthovanadate (YVO$_4$ or YVO). Specifically, we investigate the CZ gates based on magnetic dipo...
A Universal Quantum Computer From Relativistic Motion
Philip A. LeMaitre, T. R. Perche, Marius Krumm +1 more·Oct 31, 2024
We present an explicit construction of a relativistic quantum computing architecture using a variational quantum circuit approach that is shown to allow for universal quantum computing. The variational quantum circuit consists of tunable single-qubit...
Nonstabilizerness Enhances Thrifty Shadow Estimation
Datong Chen, Huangjun Zhu·Oct 31, 2024
Shadow estimation is a powerful approach for estimating the expectation values of many observables. Thrifty shadow estimation is a simple variant that is proposed to reduce the experimental overhead by reusing random circuits repeatedly. Although thi...
Detrimental non-Markovian errors for surface code memory
John F Kam, S. Gicev, Kavan Modi +2 more·Oct 31, 2024
The realization of fault-tolerant quantum computers hinges on effective quantum error correction (QEC) protocols, whose performance significantly relies on the nature of the underlying noise. In this work, we directly study the structure of non-Marko...
ECDQC: Efficient Compilation for Distributed Quantum Computing with Linear Layout
Kecheng Liu, Yidong Zhou, Haochen Luo +6 more·Oct 31, 2024
In this paper, we propose an efficient compilation method for distributed quantum computing (DQC) using the Linear Nearest Neighbor (LNN) architecture. By exploiting the LNN topology’s symmetry, we optimize quantum circuit compilation for High Local ...
Entanglement scaling and criticality of infinite-size quantum many-body systems in continuous space addressed by a tensor network approach
Rui Hong, Hao-Wei Cui, An-Chun Ji +1 more·Oct 31, 2024
Simulating strongly-correlated quantum systems in continuous space belongs to the most challenging and long-concerned issues in quantum physics. This work investigates the quantum entanglement and criticality of the ground-state wave-functions of inf...
Computation with quantum Reed-Muller codes and their mapping onto 2D atom arrays
Anqi Gong, J. Renes·Oct 30, 2024
We give a fault tolerant construction for error correction and computation using two punctured quantum Reed-Muller (PQRM) codes. In particular, we consider the $[[127,1,15]]$ self-dual doubly-even code that has transversal Clifford gates (CNOT, H, S)...
Of gyrators and non-identical anyons
O. Kashuba, R. Mummadavarapu, R. -P. Riwar·Oct 28, 2024
Compact scalar field theories on lattices are capable of describing a large class of many-body systems, such as interacting bosons, superconducting circuit networks, spin systems and more. We show that a generic quantum geometric many-body coupling p...