Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Linear quantum coupler for clean bosonic control
Aniket Maiti, John W. O. Garmon, Yao Lu +3 more·Jan 29, 2025
Quantum computing with superconducting circuits relies on high-fidelity driven nonlinear processes. An ideal quantum nonlinearity would selectively activate desired coherent processes at high strength, without activating parasitic mixing products or ...
High-fidelity QND readout and measurement back-action in a tantalum-based high-coherence fluxonium qubit
Gaurav Bothara, Srijita Das, K. Salunkhe +4 more·Jan 28, 2025
Implementing a precise measurement of the quantum state of a qubit is critical for building a practical quantum processor, as it plays an important role in state initialization and quantum error correction. While the transmon qubit has been the most ...
Dephasing-induced leakage in multi-level superconducting quantum circuits
F. Strauch·Jan 28, 2025
Superconducting quantum circuits, such as the transmon, have multiple quantum states beyond the computational subspace. These states can be populated during quantum logic operations; residual population in such states is known as leakage. While contr...
Entanglement in Markovian hybrid classical-quantum theories of gravity
Oliviero Angeli, Matteo Carlesso·Jan 27, 2025
Markovian master equations underlie many areas of modern physics and, despite their apparent simplicity, they encode a rich and complex dynamics which is still under active research. We identify a class of continuous variable Markovian master equatio...
Error-mitigated geometric quantum control over an oscillator
M. Liang, Tao Chen, Zheng-Yuan Xue·Jan 24, 2025
Quantum information is very fragile to environmentally and operationally induced imperfections. Therefore, the construction of practical quantum computers requires quantum error-correction techniques to protect quantum information. In particular, enc...
Random Quantum Circuits with Time-Reversal Symmetry
Kabir Khanna, Abhishek Kumar, Romain Vasseur +1 more·Jan 22, 2025
Time-reversal (TR) symmetry is crucial for understanding a wide range of physical phenomena, and plays a key role in constraining fundamental particle interactions and in classifying phases of quantum matter. In this work, we introduce an ensemble of...
Fully quantum inflation: quantum marginal problem constraints in the service of causal inference
Isaac D. Smith, Elie Wolfe, Robert W. Spekkens·Jan 21, 2025
Consider the problem of deciding, for a particular multipartite quantum state, whether or not it is realizable in a quantum network with a particular causal structure. This is a fully quantum version of what causal inference researchers refer to as t...
Frozonium: Freezing Anharmonicity in Floquet Superconducting Circuits
Keiran Lewellen, Rohit Mukherjee, Haoyu Guo +3 more·Jan 17, 2025
Floquet engineering is a powerful method that can be used to modify the properties of interacting many-body Hamiltonians via the application of periodic time-dependent drives. Here we consider the physics of an inductively shunted superconducting Jos...
Large-range tuning and stabilization of the optical transition of diamond tin-vacancy centers by in situ strain control
J. M. Brevoord, Leonardo G. C. Wienhoven, Nina Codreanu +10 more·Jan 16, 2025
The negatively charged tin-vacancy (SnV−) center in diamond has emerged as a promising platform for quantum computing and quantum networks. To connect SnV− qubits in large networks, in situ tuning and stabilization of their optical transitions are es...
Learning agent-based approach to the characterization of open quantum systems
Lorenzo Fioroni, Ivan Rojkov, Florentin Reiter·Jan 9, 2025
Characterizing quantum processes is crucial for the execution of quantum algorithms on available quantum devices. A powerful framework for this purpose is the Quantum Model Learning Agent (QMLA) which characterizes a given system by learning its Hami...
Stimpack: An Adaptive Rendering Optimization System for Scalable Cloud Gaming
Jin Heo, Vic Wang, Ketan Bhardwaj +1 more·Dec 27, 2024
In distributed multimedia applications, content is often delivered to users in a degraded form due to network-induced lossy compression. Real-time and interactive use cases like cloud gaming, which render content on the fly, require low latency and a...
Celestial Quantum Error Correction. Part II. From qudits to celestial CFT
Alfredo Guevara, Yangrui Hu·Dec 27, 2024
A holographic CFT description of asymptotically flat spacetimes inherits vacuum degeneracies and IR divergences from its gravitational dual. We devise a Quantum Error Correcting (QEC) framework to encode both effects as correctable fluctuations on th...
A dynamical algebra of protocol-induced transformations on Dicke states
Pierre-Antoine Bernard, L. Vinet·Dec 23, 2024
Quantum $n$-qubit states that are totally symmetric under the permutation of qubits are essential ingredients of important algorithms and applications in quantum information. Consequently, there is significant interest in developing methods to prepar...
Lindblad engineering for quantum Gibbs state preparation under the eigenstate thermalization hypothesis
Eric Brunner, Luuk Coopmans, Gabriel Matos +5 more·Dec 23, 2024
Building upon recent progress in Lindblad engineering for quantum Gibbs state preparation algorithms, we propose a simplified protocol that is shown to be efficient under the eigenstate thermalization hypothesis (ETH). The ETH reduces circuit overhea...
Classical simulability of Clifford+T circuits with Clifford-augmented matrix product states
Zejun Liu, Bryan K. Clark·Dec 23, 2024
Determining the quantum-classical boundary between quantum circuits which can be efficiently simulated classically and those which cannot remains a fundamental question. One approach to classical simulation is to represent the output of a quantum cir...
Crosstalk-induced Side Channel Threats in Multi-Tenant NISQ Computers
Navnil Choudhury, Chaithanya Naik Mude, Sanjay Das +3 more·Dec 13, 2024
As quantum computing rapidly advances, its near-term applications are becoming increasingly evident. However, the high cost and under-utilization of quantum resources are prompting a shift from single-user to multi-user access models. In a multi-tena...
Deterministic Storage of Quantum Information in the Genetic Code
Roberto Rivelino·Dec 10, 2024
DNA has been proposed as a chemical platform for computing and data storage, paving the way for building DNA-based computers. Recently, DNA has been hypothesized as an ideal quantum computer with the base pairs working as Josephson junctions. There a...
Noise-induced quantum-circuit refrigeration
Heidi Kivijarvi, A. Viitanen, Timm Morstedt +1 more·Dec 8, 2024
We use a transmon qubit and its dispersively coupled readout resonator to measure the Fock state populations of another microwave resonator, to which we have attached a quantum-circuit refrigerator (QCR). First, we apply noise generated at room tempe...
Quantum network tomography of small Rydberg arrays by machine learning
Kaustav Mukherjee, Johannes Schachenmayer, S. Whitlock +1 more·Dec 7, 2024
Configurable arrays of optically trapped Rydberg atoms are a versatile platform for quantum computation and quantum simulation, also allowing controllable decoherence. We demonstrate theoretically, that they also enable proof-of-principle demonstrati...
Engineering qubit dynamics in open systems with photonic synthetic lattices
Francesco Di Colandrea, Tareq Jaouni, J. Grace +4 more·Dec 5, 2024
The evolution of a quantum system interacting with an environment can be described as a unitary process acting on both the system and the environment. In this framework, the system's evolution can be predicted by tracing out the environmental degrees...