Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Evaluating the resilience of variational quantum algorithms to leakage noise
Chen Ding, Xiao-Yue Xu, Shuo Zhang +2 more·Aug 10, 2022
As we are entering the era of constructing practical quantum computers, suppressing the inevitable noise to accomplish reliable computational tasks will be the primary goal. Leakage noise, as the amplitude population leaking outside the qubit subspac...
Modeling of planar germanium hole qubits in electric and magnetic fields
Chien-An Wang, Ercan Ekmel, M. Gyure +3 more·Aug 9, 2022
Hole-based spin qubits in strained planar germanium quantum wells have received considerable attention due to their favorable properties and remarkable experimental progress. The sizeable spin-orbit interaction in this structure allows for efficient ...
Recovery With Incomplete Knowledge: Fundamental Bounds on Real-Time Quantum Memories
Arshag Danageozian·Aug 8, 2022
Noise drift in quantum hardware is an important obstacle for scalable quantum computation, e.g. when performing complex quantum algorithms with runtimes exeeding the characteristic time of the noise drift. I address this problem by proposing drift-ad...
Effect of fast noise on the fidelity of trapped-ion quantum gates
Haim Nakav, R. Finkelstein, Lee Peleg +2 more·Aug 6, 2022
High fidelity single and multi-qubit operations compose the backbone of quantum information processing. This fidelity is based on the ability to couple single- or two-qubit levels in an extremely coherent and precise manner. A necessary condition for...
Quantum Error Correction Via Noise Guessing Decoding
Diogo Cruz, F. A. Monteiro, B. Coutinho·Aug 4, 2022
Quantum error correction codes (QECCs) play a central role in both quantum communications and quantum computation. Practical quantum error correction codes, such as stabilizer codes, are generally structured to suit a specific use, and present rigid ...
Multi-mode architectures for noise-resilient superconducting qubits
A. Calzona, M. Carrega·Aug 4, 2022
Great interest revolves around the development of new strategies to efficiently store and manipulate quantum information in a robust and decoherence-free fashion. Several proposals have been put forward to encode information into qubits that are simu...
Implementing Fault-tolerant Entangling Gates on the Five-qubit Code and the Color Code
C. Ryan-Anderson, N. C. Brown, M. S. Allman +34 more·Aug 3, 2022
We compare two different implementations of fault-tolerant entangling gates on logical qubits. In one instance, a twelve-qubit trapped-ion quantum computer is used to implement a non-transversal logical CNOT gate between two five qubit codes. The ope...
Quantum approximate optimization algorithm in non-Markovian quantum systems
Bo Yue, Shibei Xue, Yu Pan +1 more·Aug 3, 2022
Although quantum approximate optimization algorithm (QAOA) has demonstrated its quantum supremacy, its performance on Noisy Intermediate-Scale Quantum (NISQ) devices would be influenced by complicated noises, e.g. quantum colored noises. To evaluate ...
Energy transport and optimal design of noisy Platonic quantum networks
C. Javaherian, C. Ferrie·Aug 2, 2022
Optimal energy transport is one of the primary goals for designing efficient quantum networks. In this work, the maximum energy transport is investigated for three-dimensional quantum networks with Platonic geometries affected by dephasing and dissip...
Techniques for combining fast local decoders with global decoders under circuit-level noise
C. Chamberland, L. Gonçalves, P. Sivarajah +2 more·Aug 2, 2022
Implementing algorithms on a fault-tolerant quantum computer will require fast decoding throughput and latency times to prevent an exponential increase in buffer times between the applications of gates. In this work we begin by quantifying these requ...
NAPA: Intermediate-Level Variational Native-Pulse Ansatz for Variational Quantum Algorithms
Zhiding Liang, Jinglei Cheng, Hang Ren +8 more·Aug 2, 2022
Variational quantum algorithms (VQAs) have demonstrated great potentials in the noisy intermediate scale quantum (NISQ) era. In the workflow of VQA, the parameters of ansatz are iteratively updated to approximate the desired quantum states. We have s...
Conserved charges in the quantum simulation of integrable spin chains
K. Maruyoshi, T. Okuda, Juan W. Pedersen +3 more·Aug 1, 2022
When simulating the time evolution of quantum many-body systems on a digital quantum computer, one faces the challenges of quantum noise and of the Trotter error due to time discretization. For certain spin chains, it is possible to discretize the ti...
Exact and efficient Lanczos method on a quantum computer
William M. Kirby, M. Motta, Antonio Mezzacapo·Aug 1, 2022
We present an algorithm that uses block encoding on a quantum computer to exactly construct a Krylov space, which can be used as the basis for the Lanczos method to estimate extremal eigenvalues of Hamiltonians. While the classical Lanczos method has...
Parameter-Parallel Distributed Variational Quantum Algorithm
Yun-Fei Niu, Shuo Zhang, Chen Ding +2 more·Jul 31, 2022
Variational quantum algorithms (VQAs) have emerged as a promising near-term technique to explore practical quantum advantage on noisy intermediate-scale quantum (NISQ) devices. However, the inefficient parameter training process due to the incompatib...
Quantum Error Correction: Noise-Adapted Techniques and Applications
Akshaya Jayashankar, Prabha Mandayam·Jul 31, 2022
The quantum computing devices of today have tens to hundreds of qubits that are highly susceptible to noise due to unwanted interactions with their environment. The theory of quantum error correction provides a scheme by which the effects of such noi...
Quantum Vulnerability Analysis to Guide Robust Quantum Computing System Design
Fang Qi, Kaitlin N. Smith, Travis Lecompte +4 more·Jul 29, 2022
While quantum computers provide exciting opportunities for information processing, they currently suffer from noise during computation that is not fully understood. Incomplete noise models have led to discrepancies between quantum program success rat...
Quantum Many-Body Jarzynski Equality and Dissipative Noise on a Digital Quantum Computer
D. Hahn, M. Dupont, M. Schmitt +2 more·Jul 28, 2022
The quantum Jarzynski equality and the Crooks relation are fundamental laws connecting equilibrium processes with nonequilibrium fluctuations. They are promising tools to benchmark quantum devices and measure free energy differences. While they are w...
Toward Highly Efficient Multimode Superconducting Quantum Memory
A. Matanin, K. Gerasimov, E. Moiseev +8 more·Jul 28, 2022
Microwave quantum memory promises advanced capabilities for noisy intermediate-scale superconducting quantum computers. Existing approaches to microwave quantum memory lack complete combination of high efficiency, long storage time, noiselessness and...
Towards solving the Fermi-Hubbard model via tailored quantum annealers
Ryan Levy, Zoe Gonzalez Izquierdo, Zhihui Wang +8 more·Jul 28, 2022
The Fermi-Hubbard model (FHM) on a two dimensional square lattice has long been an important testbed and target for simulating fermionic Hamiltonians on quantum hardware. We present an alternative for quantum simulation of FHMs based on an adiabatic ...
: A isualization pproah for Noie Awarenss in Quatum Computing
Shaolun Ruan, Yong Wang, Weiwen Jiang +2 more·Jul 28, 2022
Quantum computing has attracted considerable public attention due to its exponential speedup over classical computing. Despite its advantages, today's quantum computers intrinsically suffer from noise and are error-prone. To guarantee the high fideli...