Daan Camps
YOU?
Author Swipe
View article: Are Randomized Quantum Linear Systems Solvers Practical?
Are Randomized Quantum Linear Systems Solvers Practical? Open
Randomized quantum algorithms have been proposed in the context of quantum simulation and quantum linear algebra with the goal of constructing shallower circuits than methods based on block encodings. While the algorithmic complexities of …
View article: Quantum Krylov Algorithm for Szegö Quadrature
Quantum Krylov Algorithm for Szegö Quadrature Open
We present a quantum algorithm to evaluate matrix elements of functions of unitary operators. The method is based on calculating quadrature nodes and weights using data collected from a quantum processor. Given a unitary $U$ and quantum st…
View article: A Closeness Centrality-based Circuit Partitioner for Quantum Simulations
A Closeness Centrality-based Circuit Partitioner for Quantum Simulations Open
Simulating quantum circuits (QC) on high-performance computing (HPC) systems has become an essential method to benchmark algorithms and probe the potential of large-scale quantum computation despite the limitations of current quantum hardw…
View article: Quantum Computing Technology Roadmaps and Capability Assessment for Scientific Computing -- An analysis of use cases from the NERSC workload
Quantum Computing Technology Roadmaps and Capability Assessment for Scientific Computing -- An analysis of use cases from the NERSC workload Open
The National Energy Research Scientific Computing Center (NERSC), as the high-performance computing (HPC) facility for the Department of Energy's Office of Science, recognizes the essential role of quantum computing in its future mission. …
View article: Estimating Eigenenergies from Quantum Dynamics: A Unified Noise-Resilient Measurement-Driven Approach
Estimating Eigenenergies from Quantum Dynamics: A Unified Noise-Resilient Measurement-Driven Approach Open
Ground state energy estimation in physical, chemical, and materials sciences is one of the most promising applications of quantum computing. In this work, we introduce a new hybrid approach that finds the eigenenergies by collecting real-t…
View article: Efficient Quantum Implementation of Dynamical Mean Field Theory for Correlated Materials
Efficient Quantum Implementation of Dynamical Mean Field Theory for Correlated Materials Open
The accurate theoretical description of materials with strongly correlated electrons is a formidable challenge in condensed matter physics and computational chemistry. Dynamical Mean Field Theory (DMFT) is a successful approach that predic…
View article: Quantum criticality and nonequilibrium dynamics on a Lieb lattice of Rydberg atoms
Quantum criticality and nonequilibrium dynamics on a Lieb lattice of Rydberg atoms Open
Neutral-atom quantum simulators offer a promising approach to the exploration of strongly interacting many-body systems, with applications spanning condensed matter, statistical mechanics, and high-energy physics. Through a combination of …
View article: A Practical Framework for Assessing the Performance of Observable Estimation in Quantum Simulation
A Practical Framework for Assessing the Performance of Observable Estimation in Quantum Simulation Open
Simulating dynamics of physical systems is a key application of quantum computing, with potential impact in fields such as condensed matter physics and quantum chemistry. However, current quantum algorithms for Hamiltonian simulation yield…
View article: The RQR algorithm
The RQR algorithm Open
Pole-swapping algorithms, generalizations of bulge-chasing algorithms, have been shown to be a viable alternative to the bulge-chasing QZ algorithm for solving the generalized eigenvalue problem for a matrix pencil . It is natural to try t…
View article: QCLAB: A Matlab Toolbox for Quantum Computing
QCLAB: A Matlab Toolbox for Quantum Computing Open
We introduce QCLAB, an object-oriented MATLAB toolbox for constructing, representing, and simulating quantum circuits. Designed with an emphasis on numerical stability, efficiency, and performance, QCLAB provides a reliable platform for pr…
View article: Simple Diagonal Designs with Reconfigurable Real-Time Circuits
Simple Diagonal Designs with Reconfigurable Real-Time Circuits Open
Unitary designs are widely used in quantum computation, but in many practical settings it suffices to construct a diagonal state design generated with unitary gates diagonal in the computational basis. In this work, we introduce a simple a…
View article: HamLib: A library of Hamiltonians for benchmarking quantum algorithms and hardware
HamLib: A library of Hamiltonians for benchmarking quantum algorithms and hardware Open
In order to characterize and benchmark computational hardware, software, and algorithms, it is essential to have many problem instances on-hand. This is no less true for quantum computation, where a large collection of real-world problem i…
View article: The RQR algorithm
The RQR algorithm Open
Pole-swapping algorithms, generalizations of bulge-chasing algorithms, have been shown to be a viable alternative to the bulge-chasing QZ algorithm for solving the generalized eigenvalue problem for a matrix pencil A - λB. It is natural to…
View article: Long-lived oscillations of metastable states in neutral atom systems
Long-lived oscillations of metastable states in neutral atom systems Open
Metastable states arise in a range of quantum systems and can be observed in\nvarious dynamical scenarios, including decay, bubble nucleation, and long-lived\noscillations. The phenomenology of metastable states has been examined in\nquant…
View article: False vacuum decay and nucleation dynamics in neutral atom systems
False vacuum decay and nucleation dynamics in neutral atom systems Open
Metastable states of quantum many-body systems with confinement offer a means to simulate false vacuum phenomenology, including nonequilibrium dynamical processes like decay by nucleation, in truncated limits. Recent work has examined the …
View article: Efficient Measurement-Driven Eigenenergy Estimation with Classical Shadows
Efficient Measurement-Driven Eigenenergy Estimation with Classical Shadows Open
Quantum algorithms exploiting real-time evolution under a target Hamiltonian have demonstrated remarkable efficiency in extracting key spectral information. However, the broader potential of these methods, particularly beyond ground state …
View article: Engineering Quantum States with Neutral Atoms
Engineering Quantum States with Neutral Atoms Open
Aquila, an analog quantum simulation platform developed by QuEra Computing, supports control of the position and coherent evolution of up to 256 neutral atoms. This study details novel experimental protocols designed for analog quantum sim…
View article: Non-Clifford diagonalization for measurement shot reduction in quantum expectation value estimation
Non-Clifford diagonalization for measurement shot reduction in quantum expectation value estimation Open
Estimating expectation values on near-term quantum computers often requires a prohibitively large number of measurements. One widely-used strategy to mitigate this problem has been to partition an operator's Pauli terms into sets of mutual…
View article: Quantum Rational Transformation Using Linear Combinations of Hamiltonian Simulations
Quantum Rational Transformation Using Linear Combinations of Hamiltonian Simulations Open
Rational functions are exceptionally powerful tools in scientific computing, yet their abilities to advance quantum algorithms remain largely untapped. In this paper, we introduce effective implementations of rational transformations of a …
View article: Quantum-centric supercomputing for materials science: A perspective on challenges and future directions
Quantum-centric supercomputing for materials science: A perspective on challenges and future directions Open
View article: HamPerf: A Hamiltonian-Oriented Approach to Quantum Benchmarking
HamPerf: A Hamiltonian-Oriented Approach to Quantum Benchmarking Open
Quantum computing technologies are undergoing rapid development. The different qubit modalities being considered for quantum computing each have their strengths and weaknesses, making it challenging to compare their performance relative to…
View article: Evaluation of the Classical Hardware Requirements for Large-Scale Quantum Computations
Evaluation of the Classical Hardware Requirements for Large-Scale Quantum Computations Open
We develop a new model to evaluate the necessary classical computing and networking resources required to support a large-scale fault-tolerant quantum computer based on superconducting qubits and a surface code architecture. We focus speci…
View article: False vacuum decay and nucleation dynamics in neutral atom systems
False vacuum decay and nucleation dynamics in neutral atom systems Open
Metastable states of quantum many-body systems with confinement offer a means to simulate false vacuum phenomenology, including non-equilibrium dynamical processes like decay by nucleation, in truncated limits. Recent work has examined the…
View article: Engineering quantum states with neutral atoms
Engineering quantum states with neutral atoms Open
Aquila, an analog quantum simulation platform developed by QuEra Computing, supports control of the position and coherent evolution of up to 256 neutral atoms. This study details novel experimental protocols designed for analog quantum sim…
View article: Explicit Quantum Circuits for Block Encodings of Certain Sparse Matrices
Explicit Quantum Circuits for Block Encodings of Certain Sparse Matrices Open
Many standard linear algebra problems can be solved on a quantum computer by using recently developed quantum linear algebra algorithms that make use of block encodings and quantum eigenvalue/singular value transformations. A block encodin…
View article: Quantum-parallel vectorized data encodings and computations on trapped-ion and transmon QPUs
Quantum-parallel vectorized data encodings and computations on trapped-ion and transmon QPUs Open
Compact data representations in quantum systems are crucial for the development of quantum algorithms for data analysis. In this study, we present two innovative data encoding techniques, known as QCrank and QBArt , which exhibit significa…
View article: Simple Diagonal State Designs with Reconfigurable Real-Time Circuits
Simple Diagonal State Designs with Reconfigurable Real-Time Circuits Open
Unitary designs are widely used in quantum computation, but in many practical settings it suffices to construct a diagonal state design generated with unitary gates diagonal in the computational basis. In this work, we introduce a simple a…
View article: Simulating dirty bosons on a quantum computer
Simulating dirty bosons on a quantum computer Open
Quantum computers hold the potential to unlock new discoveries in complex quantum systems by enabling the simulation of physical systems that have heretofore been impossible to implement on classical computers due to intractability. A syst…
View article: Measurement reduction for expectation values via fine-grained commutativity
Measurement reduction for expectation values via fine-grained commutativity Open
We introduce a notion of commutativity between operators on a tensor product space, nominally Pauli strings on qubits, that interpolates between qubit-wise commutativity and (full) commutativity. We apply this notion, which we call $k$-com…
View article: Quantum-centric Supercomputing for Materials Science: A Perspective on Challenges and Future Directions
Quantum-centric Supercomputing for Materials Science: A Perspective on Challenges and Future Directions Open
Computational models are an essential tool for the design, characterization, and discovery of novel materials. Hard computational tasks in materials science stretch the limits of existing high-performance supercomputing centers, consuming …