Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Nearest neighbor synthesis of CNOT circuits on general quantum architectures
Xinyu Chen, Min Zhu, Xueyun Cheng +2 more·Oct 1, 2023
NISQ devices have inherent limitations in terms of connectivity and hardware noise. The synthesis of CNOT circuits considers the physical constraints and transforms quantum algorithms into low-level quantum circuits that can execute on physical chips...
Analyzing Quantum Programs with LintQ: A Static Analysis Framework for Qiskit
Matteo Paltenghi, Michael Pradel·Oct 1, 2023
As quantum computing is rising in popularity, the amount of quantum programs and the number of developers writing them are increasing rapidly. Unfortunately, writing correct quantum programs is challenging due to various subtle rules developers need ...
Qubit gate operations in elliptically trapped polariton condensates
L. S. Ricco, I. Shelykh, A. Kavokin·Sep 29, 2023
We consider bosonic condensates of exciton-polaritons optically confined in elliptical traps. A superposition of two non-degenerated p-type states of the condensate oriented along the two main axes of the trap is represented by a point on a Bloch sph...
Charge-parity switching effects and optimisation of transmon-qubit design parameters
Miha Papič, J. Tuorila, Adrian Auer +2 more·Sep 29, 2023
Enhancing the performance of noisy quantum processors requires improving our understanding of error mechanisms and the ways to overcome them. A judicious selection of qubit design parameters plays a pivotal role in improving the performance of quantu...
SU(d)-symmetric random unitaries: quantum scrambling, error correction, and machine learning
Zimu Li, Han Zheng, Yunfei Wang +3 more·Sep 28, 2023
Quantum information processing in the presence of continuous symmetry is of wide importance and exhibits many novel physical and mathematical phenomena. SU(d) is a continuous symmetry group of particular interest since it represents a fundamental typ...
First-order crosstalk mitigation in parallel quantum gates driven with multi-photon transitions
Matthew N. H. Chow, C. Yale, Ashlyn D. Burch +4 more·Sep 27, 2023
We demonstrate an order of magnitude reduction in the sensitivity to optical crosstalk for neighboring trapped-ion qubits during simultaneous single-qubit gates driven with individual addressing beams. Gates are implemented via two-photon Raman trans...
Group twirling and noise tailoring for multiqubit controlled phase gates
Guoding Liu, Ziyi Xie, Zitai Xu +1 more·Sep 27, 2023
Group twirling is crucial in quantum information processing, particularly in randomized benchmarking and randomized compiling. While protocols based on Pauli twirling have been effectively crafted to transform arbitrary noise channels into Pauli chan...
An Architecture for Improved Surface Code Connectivity in Neutral Atoms
Joshua Viszlai, S. Lin, Siddharth Dangwal +2 more·Sep 24, 2023
In order to achieve error rates necessary for advantageous quantum algorithms, Quantum Error Correction (QEC) will need to be employed, improving logical qubit fidelity beyond what can be achieved physically. As today's devices begin to scale, co-des...
Randomized term grouping over physical law on digital quantum simulation
Songqin Yang·Sep 24, 2023
We introduce a randomized algorithm based on qDrift to compute Hamiltonian dynamics on digital quantum computers. We frame it as physDrift because conservation laws in physics are obeyed during evolution of arbitrary quantum states. Empirically we ac...
Encoding optimization for quantum machine learning demonstrated on a superconducting transmon qutrit
Shuxiang Cao, Weixi Zhang, Jules Tilly +9 more·Sep 22, 2023
A qutrit represents a three-level quantum system, so that one qutrit can encode more information than a qubit, which corresponds to a two-level quantum system. This work investigates the potential of qutrit circuits in machine learning classification...
Variational Quantum Harmonizer: Generating Chord Progressions and Other Sonification Methods with the VQE Algorithm
P. Itaboraí, Tim Schwägerl, María Aguado Yáñez +4 more·Sep 21, 2023
This work investigates a case study of using physical-based sonification of Quadratic Unconstrained Binary Optimization (QUBO) problems, optimized by the Variational Quantum Eigensolver (VQE) algorithm. The VQE approximates the solution of the proble...
Optimization of Quantum Circuits for Stabilizer Codes
Arijit Mondal, Keshab K. Parhi·Sep 21, 2023
Quantum computing is an emerging technology that has the potential to achieve exponential speedups over their classical counterparts. To achieve quantum advantage, quantum principles are being applied to fields such as communications, information pro...
Three-qubit parity gate via simultaneous cross-resonance drives
Toshinari Itoko, Moein Malekakhlagh, Naoki Kanazawa +1 more·Sep 20, 2023
Native multi-qubit parity gates have various potential quantum computing applications, such as entanglement creation, logical state encoding and parity measurement in quantum error correction. Here, using simultaneous cross-resonance drives on two co...
Synthesis of energy-conserving quantum circuits with XY interaction
Ge Bai, Iman Marvian·Sep 20, 2023
We study quantum circuits constructed from iSWAP gates and, more generally, from the entangling gates that can be realized with the XX + YY interaction alone. Such gates preserve the Hamming weight of states in the computational basis, which means th...
Fault-tolerant one-bit addition with the smallest interesting color code
Yang Wang, Selwyn Simsek, T. Gatterman +9 more·Sep 18, 2023
Fault-tolerant operations based on stabilizer codes are the state of the art in suppressing error rates in quantum computations. Most such codes do not permit a straightforward implementation of non-Clifford logical operations, which are necessary to...
Correcting on-chip distortion of control pulses with silicon spin qubits
Ming 铭 Ni 倪, R. Ma 马, Zhen-Zhen 真真 Kong 孔 +10 more·Sep 18, 2023
In semiconductor quantum dot systems, pulse distortion is a significant source of coherent errors, which impedes qubit characterization and control. Here, we demonstrate two calibration methods using a two-qubit system as the detector to correct dist...
Quantum algorithms for state preparation and data classification based on stabilizer codes
P. Jouzdani, H. A. Hashim, E. Mucciolo·Sep 18, 2023
Quantum error correction (QEC) is a way to protect quantum information against noise. It consists of encoding input information into entangled quantum states known as the code space. Furthermore, to classify if the encoded information is corrupted or...
Transversal Injection: Using the Surface Code to Prepare Non-Pauli Eigenstates
J. Gavriel, Daniel Herr, Alexis Shaw +3 more·Sep 17, 2023
The development of quantum computing systems for large scale algorithms requires targeted error rates un-achievable through hardware advancements alone. Quantum Error Correction (QEC) allows us to use systems with a large number of physical qubits to...
Resource Estimation of Quantum Multiplication Algorithms
Ethan Hansen, Sanskriti Joshi, Hannah Rarick·Sep 17, 2023
As quantum computers progress towards a larger scale, it is imperative that the “top” of the computing-technology stack is improved. This project investigates the quantum resources required to compute primitive arithmetic algorithms, particularly mul...
Quantum Circuit Optimization through Iteratively Pre-Conditioned Gradient Descent
Dhruv Srinivasan, Kushal Chakrabarti, Nikhil Chopra +1 more·Sep 17, 2023
Gate-based quantum algorithms are typically implemented by circuits consisting of many single-qubit and multi-qubit gates operating on a quantum input state, followed by measurements of the output state. For certain quantum subroutines, such as initi...