Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Controlled Spalling of 4H Silicon Carbide with Investigated Spin Coherence for Quantum Engineering Integration
Connor P. Horn, Christina Wicker, Antoni Wellisz +6 more·Apr 30, 2024
We detail scientific and engineering advances which enable the controlled spalling and layer transfer of single crystal 4H silicon carbide (4H-SiC) from bulk substrates. 4H-SiC’s properties, including high thermal conductivity and a wide bandgap, mak...
Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon
Noah Shofer, Leon Zaporski, Martin Hayhurst Appel +9 more·Apr 30, 2024
A central spin qubit interacting coherently with an ensemble of proximal spins can be used to engineer entangled collective states or a multiqubit register. Making full use of this many-body platform requires tuning the interaction between the centra...
The Mathematical Foundation of Post-Quantum Cryptography
Chuanming Zong·Apr 30, 2024
In 1994, P. Shor discovered quantum algorithms that can break both the RSA cryptosystem and the ElGamal cryptosystem. In 2007, a Canadian company D-Wave demonstrated the first quantum computer. These events and quick further developments have brought...
QuTracer: Mitigating Quantum Gate and Measurement Errors by Tracing Subsets of Qubits
Peiyi Li, Ji Liu, A. Gonzales +3 more·Apr 30, 2024
Quantum error mitigation plays a crucial role in the current noisy-intermediate-scale-quantum (NISQ) era. As we advance towards achieving a practical quantum advantage in the near term, error mitigation emerges as an indispensable component. One nota...
Purcell-enhanced optical refrigeration
Peng Ju, Kunhong Shen, Stefan Püschel +3 more·Apr 29, 2024
Optical refrigeration of solids with anti-Stokes fluorescence has been widely explored as a vibration-free cryogenic cooling technology. A minimum temperature of 87 K has been demonstrated with rare-earth ion doped crystals using optical refrigeratio...
The PRODSAT phase of random quantum satisfiability
Joon Lee, Nicolas Macris, Jean Bernoulli Ravelomanana +1 more·Apr 29, 2024
The $k$-QSAT problem is a quantum analog of the famous $k$-SAT constraint satisfaction problem. We must determine the zero energy ground states of a Hamiltonian of $N$ qubits consisting of a sum of $M$ random $k$-local rank-one projectors. It is know...
An Early Investigation of the HHL Quantum Linear Solver for Scientific Applications
Muqing Zheng, Chenxu Liu, S. Stein +4 more·Apr 29, 2024
In this paper, we explore using the Harrow–Hassidim–Lloyd (HHL) algorithm to address scientific and engineering problems through quantum computing, utilizing the NWQSim simulation package on a high-performance computing platform. Focusing on domains ...
Low-overhead defect-adaptive surface code with bandage-like super-stabilizers
Zuolin Wei, Tan He, Y. Ye +7 more·Apr 29, 2024
To make practical quantum algorithms work, large-scale quantum processors protected by error-correcting codes are required to resist noise and ensure reliable computational outcomes. However, a major challenge arises from defects in processor fabrica...
A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
M. Ni, Rong-Long Ma, Zhen-Zhen Kong +11 more·Apr 29, 2024
To realize large-scale quantum information processes, an ideal scheme for two-qubit operations should enable diverse operations with given hardware and physical interaction. However, for spin qubits in semiconductor quantum dots, the common two-qubit...
The impact of noise on the simulation of NMR spectroscopy on NISQ devices
A. Khedri, Pascal Stadler, Kirsten Bark +5 more·Apr 29, 2024
With the surge of quantum computing platforms that continue to push the boundaries of capabilities of noisy intermediate-scale quantum computers, there is a growing interest in finding relevant applications and quantifying the corresponding error bud...
Architecture for fast implementation of quantum low-density parity-check codes with optimized Rydberg gates
C. Poole, T. M. Graham, M. Perlin +2 more·Apr 29, 2024
We propose an implementation of bivariate bicycle codes (Nature {\bf 627}, 778 (2024)) based on long-range Rydberg gates between stationary neutral atom qubits. An optimized layout of data and ancilla qubits reduces the maximum Euclidean communicatio...
Stability of Quantum Computers
Samudra Dasgupta·Apr 29, 2024
Quantum computing's potential is immense, promising super-polynomial reductions in execution time, energy use, and memory requirements compared to classical computers. This technology has the power to revolutionize scientific applications such as sim...
A SAT Scalpel for Lattice Surgery: Representation and Synthesis of Subroutines for Surface-Code Fault-Tolerant Quantum Computing
D. Tan, M. Niu, C. Gidney·Apr 29, 2024
Quantum error correction is necessary for largescale quantum computing. A promising quantum error correcting code is the surface code. For this code, fault-tolerant quantum computing (FTQC) can be performed via lattice surgery, i.e., splitting and me...
How to surpass no-go limits in Gaussian quantum error correction and entangled Gaussian state distillation?
En-Jui Chang, Ching-Yi Lai·Apr 29, 2024
Gaussian quantum information processing with continuous-variable (CV) quantum information carriers holds significant promise for applications in quantum communication and quantum internet. However, applying Gaussian state distillation and quantum err...
Fault-tolerant compiling of classically hard IQP circuits on hypercubes
Dominik Hangleiter, Marcin Kalinowski, D. Bluvstein +6 more·Apr 29, 2024
Realizing computationally complex quantum circuits in the presence of noise and imperfections is a challenging task. While fault-tolerant quantum computing provides a route to reducing noise, it requires a large overhead for generic algorithms. Here,...
Demonstration of system-bath physics on a gate-based quantum computer
Pascal Stadler, Matteo Lodi, A. Khedri +5 more·Apr 29, 2024
Algorithmic cooling can be used to find correlated states of many-body quantum systems. It is based on quantum circuits that perform nonunitary operations, whose implementation can be challenging on near-term quantum computers. In this work we develo...
Classical Post-processing for Unitary Block Optimization Scheme to Reduce the Effect of Noise on Optimization of Variational Quantum Eigensolvers
Xiaochuan Ding, Bryan K. Clark·Apr 29, 2024
Variational Quantum Eigensolvers (VQE) are a promising approach for finding the classically intractable ground state of a Hamiltonian. The Unitary Block Optimization Scheme (UBOS) is a state-of-the-art VQE method which works by sweeping over gates an...
A general framework for active space embedding methods with applications in quantum computing
Stefano Battaglia, Max Rossmannek, V. Rybkin +2 more·Apr 29, 2024
We developed a general framework for hybrid quantum-classical computing of molecular and periodic embedding approaches based on an orbital space separation of the fragment and environment degrees of freedom. We demonstrate its potential by presenting...
Spin coupling is all you need: Encoding strong electron correlation in molecules on quantum computers
Daniel Marti-Dafcik, Hugh G. A. Burton, David P. Tew·Apr 29, 2024
The performance of quantum algorithms for eigenvalue problems, such as computing Hamiltonian spectra, depends strongly on the overlap of the initial wave function and the target eigenvector. In a basis of Slater determinants, the representation of en...
Fast Quantum Process Tomography via Riemannian Gradient Descent
Daniel Volya, Andrey Nikitin, Prabhat Mishra·Apr 29, 2024
Constrained optimization plays a crucial role in the fields of quantum physics and quantum information science and becomes especially challenging for high-dimensional complex structure problems. One specific issue is that of quantum process tomograph...