Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Wave Function Collapse, Lorentz Invariance, and the Third Postulate of Relativity
Edward J. Gillis·May 8, 2024
The changes that quantum states undergo during measurement are both probabilistic and nonlocal. These two characteristics complement one another to insure compatibility with relativity and maintain conservation laws. The probabilistic nature of nonlo...
Vibrational Entanglement through the Lens of Quantum Information Measures
Nina Glaser, Alberto Baiardi, Annina Z. Lieberherr +1 more·May 3, 2024
We introduce a quantum information analysis of vibrational wave functions to understand complex vibrational spectra of molecules with strong anharmonic couplings and vibrational resonances. For this purpose, we define one- and two-modal entropies to ...
Inverse Current in Coupled Transport: A Quantum Thermodynamic Model
Shuvadip Ghosh, Nikhil Gupt, Arnab Ghosh·May 2, 2024
The recent discovery of inverse current in coupled transport (ICC) in classical systems~\textcolor{blue}{[\textbf{Phys. Rev. Lett.} \textbf{124}, 110607 (2020)]} -- where an induced current flows opposite to two mutually parallel thermodynamic forces...
Programmable Photonic Quantum Circuits with Ultrafast Time-Bin Encoding.
Frédéric Bouchard, Kate L. Fenwick, K. Bonsma-Fisher +4 more·Apr 26, 2024
We propose a quantum information processing platform that utilizes the ultrafast time-bin encoding of photons. This approach offers a pathway to scalability by leveraging the inherent phase stability of collinear temporal interferometric networks at ...
Designing open quantum systems with known steady states: Davies generators and beyond
Jinkang Guo, Oliver Hart, Chi-Fang Chen +2 more·Apr 22, 2024
We provide a systematic framework for constructing generic models of nonequilibrium quantum dynamics with a target stationary (mixed) state. Our framework identifies (almost) all combinations of Hamiltonian and dissipative dynamics that relax to a st...
Two remote counting events induced by a single photon
Lida Zhang·Apr 21, 2024
Motivated by Einstein's thought experiment that a single quantum particle diffracted after a pinhole could in principle produce an action in two or several places on a hemispherical imaging screen, here we explore theoretically the possibility to sim...
Non-Gaussian state teleportation with a nonlinear feedforward
Vojtěch Kala, Mattia Walschaers, Radim Filip +1 more·Apr 9, 2024
Measurement-induced quantum computation with continuous-variable cluster states utilizes teleportation to transmit and alter quantum states via measurement-and-feedforward control. One of the key challenges of this approach is the deterioration of qu...
Engineering Quantum States with Neutral Atoms
Jan Balewski, M. Kornjača, Katherine Klymko +5 more·Apr 5, 2024
Aquila, an analog quantum simulation platform developed by QuEra Computing, supports control of the position and coherent evolution of up to 256 neutral atoms. This study details novel experimental protocols designed for analog quantum simulators tha...
Critical properties of weak measurement induced phase transitions in random quantum circuits
Kemal Aziz, Ahana Chakraborty, J. H. Pixley·Apr 3, 2024
The effects of different forms of weak measurements on the nature of the measurement induced phase transition are theoretically studied in hybrid random quantum circuits of qubits. We use a combination of entanglement measures, ancilla purification d...
Magic-Induced Computational Separation in Entanglement Theory
Andi Gu, Salvatore F. E. Oliviero, L. Leone·Mar 28, 2024
Entanglement serves as a foundational pillar in quantum information theory, delineating the boundary between what is classical and what is quantum. The common assumption is that a higher degree of entanglement corresponds to a greater degree of “quan...
Efficient generation of multi-partite entanglement between non-local superconducting qubits using classical feedback
A. Hashim, Ming Yuan, P. Gokhale +8 more·Mar 27, 2024
Quantum entanglement is one of the primary features which distinguish quantum computers from classical computers. In gate-based quantum computing, the creation of entangled states or the distribution of entanglement across a quantum processor often r...
Boson sampling enhanced quantum chemistry
Zhong-Xia Shang, Han-Sen Zhong, Yukun Zhang +5 more·Mar 25, 2024
In this work, we give a hybrid quantum-classical algorithm for solving electronic structure problems of molecules using only linear quantum optical systems. The variational ansatz we proposed is a hybrid of non-interacting Boson dynamics and classica...
Noise-induced shallow circuits and absence of barren plateaus
A. A. Mele, Armando Angrisani, Soumik Ghosh +4 more·Mar 20, 2024
Motivated by realistic hardware considerations of the pre-fault-tolerant era, we comprehensively study the impact of uncorrected noise on quantum circuits. We first show that any noise `truncates' most quantum circuits to effectively logarithmic dept...
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...
Variational quantum eigensolver with linear depth problem-inspired ansatz for solving portfolio optimization in finance
Shengbin Wang, Peng Wang, Guihui Li +8 more·Mar 7, 2024
Great efforts have been dedicated in recent years to exploring practical applications for noisy intermediate-scale quantum (NISQ) computers, which is a fundamental and challenging problem in quantum computing. As one of the most promising methods, th...
Scrambling transition in free fermion systems induced by a single impurity
Qucheng Gao, T. Zhou, Pengfei Zhang +1 more·Mar 6, 2024
In quantum many-body systems, interactions play a crucial role in the emergence of information scrambling. When particles interact throughout the system, the entanglement between them can lead to a rapid and chaotic spreading of quantum information, ...
Hamiltonian Property Testing
Andreas Bluhm, Matthias C. Caro, Aadil Oufkir·Mar 5, 2024
Locality is a fundamental feature of many physical time evolutions. Assumptions on locality and related structural properties also underlie recently proposed procedures for learning an unknown Hamiltonian from access to the induced time evolution. Ho...
Noise-Induced Transition in Optimal Solutions of Variational Quantum Algorithms
C. Li, Imanol Hernandez·Mar 5, 2024
Variational quantum algorithms are promising candidates for delivering practical quantum advantage on noisy intermediate-scale quantum (NISQ) hardware. However, optimizing the noisy cost functions associated with these algorithms is challenging for s...
Open quantum system approaches to superconducting qubits
H. Naeij·Feb 29, 2024
Superconducting qubits are currently a leading platform for developing a scalable quantum computer. However, random and uncontrollable noises from the environment during the design and measurement of qubits lead to limitations in qubit coherence time...
Acceptor-Induced Bulk Dielectric Loss in Superconducting Circuits on Silicon
Zi-Huai Zhang, Kadircan Godeneli, Justin He +4 more·Feb 27, 2024
The performance of superconducting quantum circuits is primarily limited by dielectric loss due to interactions with two-level systems (TLSs). State-of-the-art circuits with engineered material interfaces are approaching a limit where dielectric loss...