Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Multi-controlled Phase Gate Synthesis with ZX-calculus applied to Neutral Atom Hardware
Korbinian Staudacher, Ludwig Schmid, Johannes Zeiher +2 more·Mar 16, 2024
Quantum circuit synthesis describes the process of converting arbitrary unitary operations into a gate sequence of a fixed universal gate set, usually defined by the operations native to a given hardware platform. Most current synthesis algorithms ar...
Verification of Quantum Computations without Trusted Preparations or Measurements
E. Kashefi, D. Leichtle, Luka Music +1 more·Mar 15, 2024
With the advent of delegated quantum computing as a service, verifying quantum computations is becoming a question of great importance. Existing information theoretically Secure Delegated Quantum Computing (SDQC) protocols require the client to posse...
Effectiveness of the syndrome extraction circuit with flag qubits on IBM quantum hardware
Younghun Kim, Hansol Kim, Jeongsoo Kang +2 more·Mar 15, 2024
Large-scale quantum circuits are required to exploit the advantages of quantum computers. Despite significant advancements in quantum hardware, scalability remains a challenge, with errors accumulating as more qubits and gates are added. To overcome ...
Universal high-fidelity quantum gates for spin-qubits in diamond
H. Bartling, J. Yun, K. Schymik +8 more·Mar 15, 2024
Spins associated to solid-state colour centers are a promising platform for investigating quantum computation and quantum networks. Recent experiments have demonstrated multi-qubit quantum processors, optical interconnects, and basic quantum error co...
Quantum Fourier Transform Using Dynamic Circuits.
Elisa Bäumer, Vinay Tripathi, A. Seif +2 more·Mar 14, 2024
In dynamic quantum circuits, classical information from midcircuit measurements is fed forward during circuit execution. This emerging capability of quantum computers confers numerous advantages that can enable more efficient and powerful protocols b...
Scalable parity architecture with a shuttling-based spin qubit processor
Florian Ginzel, M. Fellner, Christian Ertler +3 more·Mar 14, 2024
Motivated by the prospect of a two-dimensional square-lattice geometry for semiconductor spin qubits, we explore the realization of the Parity Architecture with quantum dots (QDs). We present sequences of spin shuttling and quantum gates that impleme...
Optimizing the Electrical Interface for Large-Scale Color-Center Quantum Processors
L. Enthoven, M. Babaie, F. Sebastiano·Mar 14, 2024
Quantum processors based on color centers in diamond are promising candidates for future large-scale quantum computers thanks to their flexible optical interface, (relatively) high operating temperature, and high-fidelity operation. Similar to other ...
Efficient and practical Hamiltonian simulation from time-dependent product formulas
J. Bosse, Andrew M. Childs, Charles Derby +3 more·Mar 13, 2024
In this work we propose an approach for implementing time-evolution of a quantum system using product formulas. The quantum algorithms we develop have provably better scaling (in terms of gate complexity and circuit depth) than a naive application of...
Syncopated Dynamical Decoupling for Suppressing Crosstalk in Quantum Circuits
B. Evert, Zoe Gonzalez Izquierdo, James Sud +5 more·Mar 12, 2024
Theoretically understanding and experimentally characterizing and modifying the underlying Hamiltonian of a quantum system is of utmost importance in achieving high-fidelity quantum gates for quantum computing. In this work, we explore the use of dyn...
Suppressing Correlated Noise in Quantum Computers via Context-Aware Compiling
A. Seif, Haoran Liao, Vinay Tripathi +5 more·Mar 11, 2024
Coherent errors, and especially those that occur in correlation among a set of qubits, are detrimental for large-scale quantum computing. Correlations in noise can occur as a result of spatial and temporal configurations of instructions executing on ...
Multi-qubit DC gates over an inhomogeneous array of quantum dots
Jiaan Qi, Zhi-Hai Liu, Hongqi Xu·Mar 11, 2024
The prospect of large-scale quantum computation with an integrated chip of spin qubits is imminent as technology improves. This invites us to think beyond the traditional two-qubit-gate framework and consider a naturally supported ‘instruction set’ o...
Experimental realization of universal quantum gates and a six-qubit entangled state using a photonic quantum walk
Kanad Sengupta, S. Dinesh, K. Shafi +2 more·Mar 11, 2024
For quantum computation using photons, performing deterministic quantum gate operations is a challenge due to the probabilistic nature of the photon-photon interaction. Encoding qubits in multiple degrees-of-freedom of photons and controlling operati...
Multi-qubit dynamical decoupling for enhanced crosstalk suppression
Siyuan Niu, A. Todri-Sanial, N. Bronn·Mar 8, 2024
Dynamical decoupling (DD) is one of the simplest error suppression methods, aiming to enhance the coherence of qubits in open quantum systems. Moreover, DD has demonstrated effectiveness in reducing coherent crosstalk, one major error source in near-...
Quantum theory of molecular orientations
Victor V. Albert, Eric Kubischta, Mikhail Lemeshko +1 more·Mar 7, 2024
We formulate a quantum phase space for rotational and nuclear-spin states of rigid molecules. For each nuclear spin isomer, we re-derive the isomer's admissible angular momentum states from molecular geometry and nuclear-spin data, introduce its angu...
Complexity-Constrained Quantum Thermodynamics
Anthony Munson, N. B. T. Kothakonda, J. Haferkamp +3 more·Mar 7, 2024
Quantum complexity measures the difficulty of realizing a quantum process, such as preparing a state or implementing a unitary. We present an approach to quantifying the thermodynamic resources required to implement a process if the process’s complex...
Efficient Magic State Distillation by Zero-level Distillation
Tomohiro Itogawa, Yugo Takada, Yutaka Hirano +1 more·Mar 7, 2024
Magic state distillation (MSD) is an essential element for universal fault-tolerant quantum computing, which distills a high-fidelity magic state from noisy magic states using ideal (error-corrected) Clifford operations. For ideal Clifford operations...
Analysis of Maximum Threshold and Quantum Security for Fault-Tolerant Encoding and Decoding Scheme Base on Steane Code
Qiqing Xia, Huiqin Xie, Li Yang·Mar 7, 2024
Steane code is one of the most widely studied quantum error-correction codes, which is a natural choice for fault-tolerant quantum computation (FTQC). However, the original Steane code is not fault-tolerant because the CNOT gates in an encoded block ...
Error Correction in Dynamical Codes
Esther Xiaozhen Fu, Daniel Gottesman·Mar 7, 2024
We ask what is the general framework for a quantum error correcting code that is defined by a sequence of measurements. Recently, there has been much interest in Floquet codes and space-time codes. In this work, we define and study the distance of a ...
Fast, Robust, and Laser-Free Universal Entangling Gates for Trapped-Ion Quantum Computing
Markus Nünnerich, D. Cohen, Patrick Barthel +4 more·Mar 7, 2024
A novel two-qubit entangling gate for trapped-ion quantum processors is proposed theoretically and demonstrated experimentally. During the gate, double-dressed quantum states are created by applying a phase-modulated continuous driving field. The spe...
Implementing the Grover algorithm in homomorphic encryption schemes
Pablo Fernández, M. Martin-Delgado·Mar 7, 2024
We apply quantum homomorphic encryption (QHE) schemes suitable for circuits with a polynomial number of T+T† gates to Grover's algorithm, performing a simulation in Qiskit of a Grover circuit that contains three qubits. The T+T†-gate complexity of Gr...