Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Ising model formulation for highly accurate topological color codes decoding
Yugo Takada, Yusaku Takeuchi, K. Fujii·Mar 2, 2023
Quantum error correction is an essential ingredient for reliable quantum computation for theoretically provable quantum speedup. Topological color codes, one of the quantum error correction codes, have an advantage against the surface codes in that a...
Experimental error suppression in Cross-Resonance gates via multi-derivative pulse shaping
Boxi Li, T. Calarco, F. Motzoi·Mar 2, 2023
While quantum circuits are reaching impressive widths in the hundreds of qubits, their depths have not been able to keep pace. In particular, cloud computing gates on multi-qubit, fixed-frequency superconducting chips continue to hover around the 1% ...
Designing High-Fidelity Zeno Gates for Dissipative Cat Qubits
R. Gautier, M. Mirrahimi, A. Sarlette·Mar 1, 2023
Bosonic cat qubits stabilized with a driven two-photon dissipation are systems with exponentially biased noise, opening the door to low-overhead, fault-tolerant and universal quantum computing. However, current gate proposals for such qubits induce s...
Circuit implementation of discrete-time quantum walks via the shunt decomposition method
Allan Wing-Bocanegra, S. Venegas-Andraca·Mar 1, 2023
Several models have been proposed to build evolution operators to perform quantum walks in a theoretical way, although when wanting to map the resulting evolution operators into quantum circuits to run them in quantum computers, it is often the case ...
Hardware Implementation of Quantum Stabilizers in Superconducting Circuits.
K. Dodge, Y. Liu, A. Klots +7 more·Mar 1, 2023
Stabilizer operations are at the heart of quantum error correction and are typically implemented in software-controlled entangling gates and measurements of groups of qubits. Alternatively, qubits can be designed so that the Hamiltonian corresponds d...
Robustness of quantum algorithms against coherent control errors
J. Berberich, D. Fink, C. Holm·Mar 1, 2023
Coherent control errors, for which ideal Hamiltonians are perturbed by unknown multiplicative noise terms, are a major obstacle for reliable quantum computing. In this paper, we present a framework for analyzing the robustness of quantum algorithms a...
A Theory of Direct Randomized Benchmarking
Anthony M. Polloreno, Arnaud Carignan-Dugas, Jordan Hines +3 more·Feb 27, 2023
Randomized benchmarking (RB) protocols are widely used to measure an average error rate for a set of quantum logic gates. However, the standard version of RB is limited because it only benchmarks a processor's native gates indirectly, by using them i...
Impact of decoherence on the fidelity of quantum gates leaving the computational subspace
Tahereh Abad, Y. Schattner, A. F. Kockum +1 more·Feb 27, 2023
The fidelity of quantum operations is often limited by incoherent errors, which typically can be modeled by fundamental Markovian noise processes such as amplitude damping and dephasing. In Phys. Rev. Lett. 129, 150504 (2022), we presented an analyti...
Robust suppression of noise propagation in GKP error-correction
C. Siegele, P. Campagne-Ibarcq·Feb 23, 2023
Straightforward logical operations contrasting with complex state preparation are the hallmarks of the bosonic encoding proposed by Gottesman, Kitaev and Preskill (GKP). The recently reported generation and error-correction of GKP qubits in trapped i...
Using Cryogenic CMOS Control Electronics to Enable a Two-Qubit Cross-Resonance Gate
D. Underwood, J. Glick, K. Inoue +18 more·Feb 22, 2023
Qubit control electronics composed of CMOS circuits are of critical interest for next generation quantum computing systems. A CMOS-based application specific integrated circuit (ASIC) fabricated in 14nm FinFET technology was used to generate and sequ...
A hybrid quantum-classical method for electron-phonon systems
M. Denner, Alexander Miessen, Haoran Yan +4 more·Feb 20, 2023
Quantum simulation of fermion-boson systems is significant in material applications, while limited by the unbounded boson states. By merging variational non-Gaussian transformations and variational quantum Eigensolvers, the authors design a hybrid qu...
Coupler Microwave-Activated Controlled-Phase Gate on Fluxonium Qubits
I. A. Simakov, G. S. Mazhorin, I. N. Moskalenko +8 more·Feb 20, 2023
Tunable couplers have recently become one of the most powerful tools for implementing two-qubit gates between superconducting qubits. A tunable coupler typically includes a nonlinear element, such as a SQUID, which is used to tune the resonance frequ...
Quantum Gate Generation in Two-Level Open Quantum Systems by Coherent and Incoherent Photons Found with Gradient Search
V. Petruhanov, A. Pechen·Feb 18, 2023
In this work, we consider an environment formed by incoherent photons as a resource for controlling open quantum systems via an incoherent control. We exploit a coherent control in the Hamiltonian and an incoherent control in the dissipator which ind...
A quantum computing implementation of nuclearelectronic orbital (NEO) theory: Toward an exact pre-Born-Oppenheimer formulation of molecular quantum systems.
Arseny Kovyrshin, Mårten Skogh, A. Broo +4 more·Feb 15, 2023
Nuclear quantum phenomena beyond the Born-Oppenheimer approximation are known to play an important role in a growing number of chemical and biological processes. While there exists no unique consensus on a rigorous and efficient implementation of cou...
Splitting phonons: Building a platform for linear mechanical quantum computing
Hong Qiao, É. Dumur, Gustav Andersson +9 more·Feb 15, 2023
Linear optical quantum computing provides a desirable approach to quantum computing, with only a short list of required computational elements. The similarity between photons and phonons points to the interesting potential for linear mechanical quant...
Quantum simulation of battery materials using ionic pseudopotentials
Modjtaba Shokrian Zini, A. Delgado, R. D. Reis +4 more·Feb 15, 2023
Ionic pseudopotentials are widely used in classical simulations of materials to model the effective potential due to the nucleus and the core electrons. Modeling fewer electrons explicitly results in a reduction in the number of plane waves needed to...
Shortcuts to adiabaticity in superconducting circuits for fast multi-partite state generation
F. C'ardenas-L'opez, J. C. Retamal, Xi Chen·Feb 15, 2023
Fast generation of multi-partite state is highly desirable in quantum information processing. By building on shortcut to adiabaticity, the authors accelerate the generation of multi-partite entangled states via reverse engineering, opening a route to...
Phase transition in stabilizer entropy and efficient purity estimation
L. Leone, Salvatore F. E. Oliviero, G. Esposito +1 more·Feb 15, 2023
Stabilizer Entropy (SE) quantifies the spread of a state in the basis of Pauli operators. It is a computationally tractable measure of non-stabilizerness and thus a useful resource for quantum computation. SE can be moved around a quantum system, eff...
Efficient qudit based scheme for photonic quantum computing
Márton Karácsony, L'aszl'o Oroszl'any, Zolt'an Zimbor'as·Feb 14, 2023
Linear optics is a promising alternative for the realization of quantum computation protocols due to the recent advancements in integrated photonic technology. In this context, usually qubit based quantum circuits are considered, however, photonic sy...
Optimal Hadamard Gate Count for Clifford+T Synthesis of Pauli Rotations Sequences
Vivien Vandaele, S. Martiel, S. Perdrix +1 more·Feb 14, 2023
The Clifford+T gate set is commonly used to perform universal quantum computation. In such setup the T gate is typically much more expensive to implement in a fault-tolerant way than Clifford gates. To improve the feasibility of fault-tolerant quantu...