Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Subjective nature of path information in quantum mechanics
Xinhe Jiang, Armin Hochrainer, Jaroslav Kysela +4 more·May 9, 2025
Common sense suggests that a particle must have a definite origin if its full path information is available. In quantum mechanics, the knowledge of path information is captured through the well-established duality relation between path distinguishabi...
Inferring charge-noise source locations from correlations in spin qubits
Juan S. Rojas-Arias, Akito Noiri, Jun Yoneda +7 more·May 9, 2025
We investigate low-frequency noise in a spin-qubit device made in isotopically purified Si/Si-Ge. Observing sizable cross-correlations among energy fluctuations of different qubits, we conclude that these fluctuations are dominated by charge noise. A...
Landauer principle and thermodynamics of computation
Pritam Chattopadhyay, A. Misra, Tanmoy Pandit +1 more·May 9, 2025
According to the Landauer principle, any logically irreversible process accompanies entropy production, which results in heat dissipation in the environment. Erasing of information, one of the primary logically irreversible processes, has a lower bou...
Bridging Classical and Quantum Information Scrambling with the Operator Entanglement Spectrum
Ben T. McDonough, Claudio Chamon, Justin H. Wilson +1 more·May 8, 2025
Universal features of chaotic quantum dynamics underlie our understanding of thermalization in closed quantum systems and the complexity of quantum computations. Reversible automaton circuits, comprised of classical logic gates, have emerged as a tra...
Symbolic Analysis of Grover Search Algorithm via Chain-of-Thought Reasoning and Quantum-Native Tokenization
Min Chen, Jinglei Cheng, Pingzhi Li +3 more·May 8, 2025
Understanding the high-level conceptual structure of quantum algorithms from their low-level circuit representations is a critical task for verification, debugging, and education. While traditional numerical simulators can calculate output probabilit...
Quantum information processing in modular cavity QED architectures
Z. M. McIntyre·May 7, 2025
This thesis contains a collection of articles exploring various aspects of quantum information processing with cavity quantum electrodynamics (QED), starting with qubit noise spectroscopy and building towards the longer-term goal of modular quantum-c...
Correlating noise floor with magic and entanglement in Pauli product states
Erika Lloyd, Alexandre Fleury, Marc P. Coons +2 more·May 7, 2025
The dependence of quantum algorithms on state fidelity is difficult to characterize analytically and is best explored experimentally as hardware scales and noisy simulations become intractable. While low fidelity states are often disregarded, they ma...
Environmental Quantum States Trigger Emission in Nonlinear Photonics
Jia-Qi Li, Xin Wang·May 6, 2025
Light-matter interactions are traditionally governed by two fundamental paradigms: spontaneous and stimulated radiation. However, in nonlinear multi-photon regimes, these classical mechanisms break down, revealing new possibilities for light emission...
Experimental Side-Channel-Secure Quantum Key Distribution over 200 km
Yang Zhou, Jing-Yang Liu, Chun-Hui Zhang +4 more·May 6, 2025
Quantum key distribution (QKD) enables two remote parties to share encryption keys with information-theoretic security guaranteed by physical laws. Side-channel-secure QKD (SCS-QKD) has attracted considerable attention because it simultaneously remov...
Sequential decoding of the XYZ$^2$ hexagonal stabilizer code
Basudha Srivastava, Yinzi Xiao, A. F. Kockum +2 more·May 6, 2025
Quantum error correction requires accurate and efficient decoding to optimally suppress errors in the encoded information. For concatenated codes, where one code is embedded within another, optimal decoding can be achieved using a message-passing alg...
Comparing classical and quantum conditional disclosure of secrets
Uma Girish, Alex May, Leo Orshansky +1 more·May 5, 2025
The conditional disclosure of secrets (CDS) setting is among the most basic primitives studied in information-theoretic cryptography. Motivated by a connection to non-local quantum computation and position-based cryptography, CDS with quantum resourc...
Fast initialization of Bell states with Schr\"odinger cats in multi-mode systems
Miriam Resch, C. Padurariu, B. Kubala +1 more·May 5, 2025
Schr\"odinger cat states play an important role for applications in continuous variable quantum information technologies. As macroscopic superpositions they are inherently protected against certain types of noise making cat qubits a promising candida...
What is a Gaussian channel, and when is it physically implementable using a multiport interferometer?
Repana Devendra, Tiju Cherian John, Sumesh Kappil·May 5, 2025
Quantum Gaussian channels are fundamental models for communication and information processing in continuous-variable quantum systems. This work addresses both foundational aspects and physical implementation pathways for these channels. Firstly, we p...
Quantum Transduction: Enabling Quantum Networking
Marcello Caleffi, Laura d'Avossa, Xu Han +1 more·May 4, 2025
The complementary features of different qubit platforms for computing and communicating impose an intrinsic hardware heterogeneity in any quantum network, where nodes, while processing and storing quantum information, must also communicate through qu...
Packaged Quantum States for Gauge-Invariant Quantum Computation and Communication
Rongchao Ma·May 4, 2025
Packaged quantum states are gauge-invariant states in which all internal quantum numbers (IQNs) form an inseparable block. This feature gives rise to novel packaged entanglements that encompass all IQNs, which is important both for fundamental physic...
Monitoring the generation of photonic linear cluster states with partial measurements
Valentin Guichard, L. Vidro, Dario A Fioretto +11 more·May 3, 2025
Quantum states of light with many entangled photons are key resources for photonic quantum computing and quantum communication. In this work, we exploit a highly resource-efficient generation scheme based on a linear optical circuit embedding a fiber...
Microwave-field quantum metrology with inherent robustness against detection losses enabled by Rydberg interactions
Stanisław Kurzyna, Bartosz Niewelt, Mateusz Mazelanik +3 more·May 2, 2025
Quantum sensing and metrology present one of the most promising near-term applications in the field of quantum technologies, with quantum sensors enabling unprecedented precision in measurements of electric, magnetic or gravitational fields and displ...
Hardware-Efficient Universal Linear Transformations for Optical Modes in the Synthetic Time Dimension
Jasvith Raj Basani, Chaohan Cui, Jack Postlewaite +2 more·May 1, 2025
Recent progress in photonic information processing has spurred strong demand in scalable and reconfigurable photonic circuitry. Conventional spatially-meshed multi-port interferometers require a number of components growing quadratically with the sys...
Experimental evidence for the physical delocalization of individual photons in an interferometer
Ryuya Fukuda, Masataka Iinuma, Yuto Matsumoto +1 more·May 1, 2025
It is generally assumed that the detection of a single photon as part of an interference pattern erases all possible which-path information. However, recent insights suggest that weak interactions can provide non-trivial experimental evidence for the...
Quantum circuit simulation of black hole evaporation and Maxwell demon interpretation
H. Hadi, A. R. Akbarieh, E. Saridakis·May 1, 2025
We suggest a quantum circuit model which simulates the black-hole evaporation process. In particular, Almheiri-Marolf-Polchinski-Sully (AMPS) paradox and the ER=EPR correspondence are reconsidered regarding our proposed model, which assumes a Maxwell...