PRX Quantum - December 2023

PRX Quantum View Email Online   Volume 4, Issue 4 October - December 2023   View Issue   Advertisement New from PRX: Collection on Ultrafast Imaging of Coherent Electron Dynamics This new collection of invited papers focuses on laser-driven generation, control, and imaging of electronic dynamics in matter on ultrafast timescales ranging from femtoseconds to attoseconds and beyond. Read the Collection free at PRX.     Advertisement Attend March Meeting 2024 Early bird registration is open for March Meeting 2024 - one of the largest and most exciting conferences in physics! Witness groundbreaking physics research, network with potential employers, and prepare for career success at March Meeting 2024. Register today.     Advertisement APS partners with Research4Life The American Physical Society (APS) has partnered with Research4Life to share its journals with researchers from nonprofits in over 115 countries, territories, and refugee camps at no cost. The Society will also cover article publication charges for new submissions from scientists belonging to these eligible groups beginning Jan. 1, 2024. Read more in the APS Newsroom     Not an APS member? Join today to start connecting with a community of more than 50,000 physicists.   Tutorial Quantum Many-Body Systems in Thermal Equilibrium Álvaro M. Alhambra PRX Quantum 4, 040201 (2023) – Published 30 November 2023 A pedagogical guide to understand important aspects of the physics and complexity of quantum many-body systems, focusing on short-range interactions and thermal equilibrium.     Hyperfine Spectroscopy of Isotopically Engineered Group-IV Color Centers in Diamond Isaac B.W. Harris, Cathryn P. Michaels, Kevin C. Chen, Ryan A. Parker, Michael Titze, Jesús Arjona Martínez, Madison Sutula, Ian R. Christen, Alexander M. Stramma, William Roth, Carola M. Purser, Martin Hayhurst Appel, Chao Li, Matthew E. Trusheim, Nicola L. Palmer, Matthew L. Markham, Edward S. Bielejec, Mete Atatüre, and Dirk Englund PRX Quantum 4, 040301 (2023) – Published 2 October 2023 First-principle calculations and experimental validation show that color centers in diamond exhibit large hyperfine coupling, making them promising candidates to build quantum registers.     Variational Quantum Dynamics of Two-Dimensional Rotor Models Matija Medvidović and Dries Sels PRX Quantum 4, 040302 (2023) – Published 4 October 2023 Classical variational methods are used to simulate the dynamics of two-dimensional quantum models with continuous degrees of freedom using neural networks, pushing the limits of classical computation in simulating these systems.     Fault-Tolerant Quantum Simulation of Materials Using Bloch Orbitals Nicholas C. Rubin, Dominic W. Berry, Fionn D. Malone, Alec F. White, Tanuj Khattar, A. Eugene DePrince, III, Sabrina Sicolo, Michael Küehn, Michael Kaicher, Joonho Lee, and Ryan Babbush PRX Quantum 4, 040303 (2023) – Published 6 October 2023 An improvement and detailed accounting of the fault-tolerant resources required for ab initio simulation of periodic systems provides context for quantum computation in materials science.     Thermal Recall: Memory-Assisted Markovian Thermal Processes Jakub Czartowski, A. de Oliveira Junior, and Kamil Korzekwa PRX Quantum 4, 040304 (2023) – Published 6 October 2023 A novel resource-theoretic framework is developed to bridge the gap between thermodynamic processes with and without memory effects.     Optimal Protocols for Quantum Metrology with Noisy Measurements Sisi Zhou, Spyridon Michalakis, and Tuvia Gefen PRX Quantum 4, 040305 (2023) – Published 9 October 2023 Preprocessing protocols for quantum control are optimized using Fisher information to set ultimate precision bounds for noisy measurements of quantum states.     Finite-Size Security for Discrete-Modulated Continuous-Variable Quantum Key Distribution Protocols Florian Kanitschar, Ian George, Jie Lin, Twesh Upadhyaya, and Norbert Lütkenhaus PRX Quantum 4, 040306 (2023) – Published 10 October 2023 Discrete-modulated continuous-variable quantum key distribution is provably secure under experimentally viable conditions in the finite-key regime against collective i.i.d. attacks.     Admissible Causal Structures and Correlations Eleftherios-Ermis Tselentis and Ämin Baumeler PRX Quantum 4, 040307 (2023) – Published 11 October 2023 Local quantum theory is found to impose novel limitations on causal structures and correlations.     State-Insensitive Trapping of Alkaline-Earth Atoms in a Nanofiber-Based Optical Dipole Trap G. Kestler, K. Ton, D. Filin, C. Cheung, P. Schneeweiss, T. Hoinkes, J. Volz, M.S. Safronova, A. Rauschenbeutel, and J.T. Barreiro PRX Quantum 4, 040308 (2023) – Published 12 October 2023 Alkaline-earth atoms are trapped with fields from a nanophotonic structure for the first time, with possible applications in quantum sensing and atomtronic-photonic circuits.     Measurement-Induced Phases of Matter Require Feedback Aaron J. Friedman, Oliver Hart, and Rahul Nandkishore PRX Quantum 4, 040309 (2023) – Published 13 October 2023 A systematic study of chaotic quantum dynamics with measurements shows that outcome-dependent feedback is needed to observe measurement-induced phases of matter.     Experimental Optical Simulator of Reconfigurable and Complex Quantum Environment P. Renault, J. Nokkala, G. Roeland, N.Y. Joly, R. Zambrini, S. Maniscalco, J. Piilo, N. Treps, and V. Parigi PRX Quantum 4, 040310 (2023) – Published 16 October 2023 A continuous-variable optical setup is used to simulate the open-system quantum dynamics with engineered environments, with applications in quantum biology, synchronization, and understanding the quantum-to-classical transition.     Learning Correlated Noise in a 39-Qubit Quantum Processor Robin Harper and Steven T. Flammia PRX Quantum 4, 040311 (2023) – Published 17 October 2023 An efficient method for modeling and measuring noise in a quantum device is proposed and experimentally tested, helping to illuminate the effectiveness of error correction against correlated noise.     Singular-Value Statistics of Non-Hermitian Random Matrices and Open Quantum Systems Kohei Kawabata, Zhenyu Xiao, Tomi Ohtsuki, and Ryuichi Shindou PRX Quantum 4, 040312 (2023) – Published 18 October 2023 A new method, based on singular values of non-Hermitian matrices, is shown to be able to identify chaos and nonintegrability in open quantum many-body systems.     Featured in Physics How to Wire a 1000-Qubit Trapped-Ion Quantum Computer M. Malinowski, D.T.C. Allcock, and C.J. Ballance PRX Quantum 4, 040313 (2023) – Published 19 October 2023 Synopsis: Efficient Control of Trapped Ions A concrete proposal for a 1000-qubit trapped-ion quantum processor takes advantage of integrated switching electronics to reduce the wiring complexity without reducing operation fidelity.     Featured in Physics Quantum Thermometry with Single Molecules in Nanoprobes V. Esteso, R. Duquennoy, R.C. Ng, M. Colautti, P. Lombardi, G. Arregui, E. Chavez-Angel, C.M. Sotomayor-Torres, P.D. Garcia, M. Hilke, and C. Toninelli PRX Quantum 4, 040314 (2023) – Published 20 October 2023 Focus: Molecular Thermometer Works Near Absolute Zero A single-molecule thermometer provides two-dimensional mapping with high spatial and temperature resolution under cryogenic conditions.     Detecting Spin-Bath Polarization with Quantum Quench Phase Shifts of Single Spins in Diamond Paul C. Jerger, Yu-Xin Wang (王语馨), Mykyta Onizhuk, Benjamin S. Soloway, Michael T. Solomon, Christopher Egerstrom, F. Joseph Heremans, Giulia Galli, Aashish A. Clerk, and David D. Awschalom PRX Quantum 4, 040315 (2023) – Published 24 October 2023 Measurements of quantum quench phase shifts enable a direct probe of an NV center's nuclear spin-bath polarization, with applications in quantum memories and metrology.     Designing High-Fidelity Zeno Gates for Dissipative Cat Qubits Ronan Gautier, Mazyar Mirrahimi, and Alain Sarlette PRX Quantum 4, 040316 (2023) – Published 25 October 2023 A new perspective on cat-qubit gates is introduced, leading to four new gate designs that improve upon the standard Zeno gate and that can increase gate fidelities by an order of magnitude for realistic experimental parameters.     Many-Body Magic Via Pauli-Markov Chains—From Criticality to Gauge Theories Poetri Sonya Tarabunga, Emanuele Tirrito, Titas Chanda, and Marcello Dalmonte PRX Quantum 4, 040317 (2023) – Published 26 October 2023 A novel quantum many-body method is developed for measuring magic, a fundamental resource in quantum information protocols.     Quantum Fourier Transform Has Small Entanglement Jielun Chen (陈捷伦), E.M. Stoudenmire, and Steven R. White PRX Quantum 4, 040318 (2023) – Published 27 October 2023 Novel results show that the quantum Fourier transform is compatible with area-law entanglement dynamics, opening the way for classical simulations using tensor networks.     Optimizing Resource Efficiencies for Scalable Full-Stack Quantum Computers Marco Fellous-Asiani, Jing Hao Chai, Yvain Thonnart, Hui Khoon Ng, Robert S. Whitney, and Alexia Auffèves PRX Quantum 4, 040319 (2023) – Published 30 October 2023 A full-stack approach to the energetics of quantum computers is introduced, allowing one to minimize their energy consumption for a given computational accuracy.     Satellite-Based Quantum Key Distribution in the Presence of Bypass Channels Masoud Ghalaii, Sima Bahrani, Carlo Liorni, Federico Grasselli, Hermann Kampermann, Lewis Wooltorton, Rupesh Kumar, Stefano Pirandola, Timothy P. Spiller, Alexander Ling, Bruno Huttner, and Mohsen Razavi PRX Quantum 4, 040320 (2023) – Published 1 November 2023 Spaceborne quantum communication protocols are studied under restrictive eavesdropping scenarios, showing that even simple QKD protocols can offer positive key rates at high channel losses.     Coupler Microwave-Activated Controlled-Phase Gate on Fluxonium Qubits Ilya A. Simakov, Grigoriy S. Mazhorin, Ilya N. Moskalenko, Nikolay N. Abramov, Alexander A. Grigorev, Dmitry O. Moskalev, Anastasiya A. Pishchimova, Nikita S. Smirnov, Evgeniy V. Zikiy, Ilya A. Rodionov, and Ilya S. Besedin PRX Quantum 4, 040321 (2023) – Published 3 November 2023 Direct control of the longitudinal coupling between fluxonium qubits and their coupler enables a novel entangling gate.     Linear Optical Logical Bell State Measurements with Optimal Loss-Tolerance Threshold Paul Hilaire, Yaron Castor, Edwin Barnes, Sophia E. Economou, and Frédéric Grosshans PRX Quantum 4, 040322 (2023) – Published 6 November 2023 Linear-optical quantum information processing is shown not to intrinsically reduce the loss tolerance performances of quantum error correction.     Quantum Repeater for W States Jorge Miguel-Ramiro, Ferran Riera-Sàbat, and Wolfgang Dür PRX Quantum 4, 040323 (2023) – Published 8 November 2023 A quantum repeater protocol that distributes three-qubit W states over arbitrary distances with polylogarithmic overhead is introduced.     Time-Dependent Hamiltonian Reconstruction Using Continuous Weak Measurements Karthik Siva, Gerwin Koolstra, John Steinmetz, William P. Livingston, Debmalya Das, L. Chen, J.M. Kreikebaum, N.J. Stevenson, C. Jünger, D.I. Santiago, I. Siddiqi, and A.N. Jordan PRX Quantum 4, 040324 (2023) – Published 9 November 2023 Continuous weak measurements enable reconstruction of time-dependent Hamiltonians, enhancing the time resolution of quantum gate errors beyond what is revealed by standard tomographic and benchmarking techniques.     End-To-End Resource Analysis for Quantum Interior-Point Methods and Portfolio Optimization Alexander M. Dalzell, B. David Clader, Grant Salton, Mario Berta, Cedric Yen-Yu Lin, David A. Bader, Nikitas Stamatopoulos, Martin J. A. Schuetz, Fernando G. S. L. Brandão, Helmut G. Katzgraber, and William J. Zeng PRX Quantum 4, 040325 (2023) – Published 13 November 2023 A detailed resource analysis of an established quantum algorithm for convex optimization reveals that the practical run times implied by this quantum solution are impractical for problems of interest in finance.     Efficient Sampling of Noisy Shallow Circuits Via Monitored Unraveling Zihan Cheng and Matteo Ippoliti PRX Quantum 4, 040326 (2023) – Published 15 November 2023 Building on the insight of unraveling noise channels into optimized measurements, a classical algorithm for sampling noisy random circuits is developed, increasing our understanding of the boundary of "practically hard" quantum computation in real-world noisy settings.     Floquet-Engineered Nonlinearities and Controllable Pair-Hopping Processes: From Optical Kerr Cavities to Correlated Quantum Matter N. Goldman, O.K. Diessel, L. Barbiero, M. Prüfer, M. Di Liberto, and L. Peralta Gavensky PRX Quantum 4, 040327 (2023) – Published 17 November 2023 A general construction shows how to design unconventional interaction processes in bosonic systems, providing a route for the exploration of exotic quantum phases of matter.     Shadow Tomography on General Measurement Frames L. Innocenti, S. Lorenzo, I. Palmisano, F. Albarelli, A. Ferraro, M. Paternostro, and G. M. Palma PRX Quantum 4, 040328 (2023) – Published 20 November 2023 The interplay between measurements, reconstructed observables, and the estimators used to process measurement outcomes is examined in a framework that connects shadow tomography with the general theory of measurement frames.     Noise-Assisted Digital Quantum Simulation of Open Systems Using Partial Probabilistic Error Cancellation José D. Guimarães, James Lim, Mikhail I. Vasilevskiy, Susana F. Huelga, and Martin B. Plenio PRX Quantum 4, 040329 (2023) – Published 21 November 2023 Noise can be used as a computational resource for simulating open quantum systems on NISQ devices.     Simple and Tighter Derivation of Achievability for Classical Communication Over Quantum Channels Hao-Chung Cheng (鄭皓中) PRX Quantum 4, 040330 (2023) – Published 22 November 2023 A judicious application of the so-called pretty-good measurement in quantum coding considerably simplifies the derivation of one-shot achievability, sharpening many existing quantum information-processing protocols.     Clifford Group and Unitary Designs under Symmetry Yosuke Mitsuhashi and Nobuyuki Yoshioka PRX Quantum 4, 040331 (2023) – Published 27 November 2023 The concept of unitary designs is extended to scenarios involving symmetry, which can be applied in the contexts of randomized benchmarking and many-body simulations.     Ultrafast Entanglement Dynamics in Monitored Quantum Circuits Shengqi Sang, Zhi Li, Timothy H. Hsieh, and Beni Yoshida PRX Quantum 4, 040332 (2023) – Published 28 November 2023 Quantum correlation and information spread superlinearly with time in quantum dynamics subject to repeated measurements.     Qudit Entanglers Using Quantum Optimal Control Sivaprasad Omanakuttan, Anupam Mitra, Eric J. Meier, Michael J. Martin, and Ivan H. Deutsch PRX Quantum 4, 040333 (2023) – Published 29 November 2023 Novel techniques based on Lie group and algebraic quantum optimal control are employed in a new protocol to implement entangling universal logic gates on qudits.     Closest Lattice Point Decoding for Multimode Gottesman-Kitaev-Preskill Codes Mao Lin, Christopher Chamberland, and Kyungjoo Noh PRX Quantum 4, 040334 (2023) – Published 1 December 2023 The advantage of decoding large instances of GKP codes from a lattice perspective is demonstrated, and several instances of optimized GKP codes that outperform the currently known codes are found.     Efficient Estimation of Trainability for Variational Quantum Circuits Valentin Heyraud, Zejian Li, Kaelan Donatella, Alexandre Le Boité, and Cristiano Ciuti PRX Quantum 4, 040335 (2023) – Published 4 December 2023 An efficient method to evaluate the trainability of variational quantum circuits allows for the exploration of strategies to overcome the barren plateau problem.     Time-Energy Uncertainty Relation for Noisy Quantum Metrology Philippe Faist, Mischa P. Woods, Victor V. Albert, Joseph M. Renes, Jens Eisert, and John Preskill PRX Quantum 4, 040336 (2023) – Published 5 December 2023 The impact of noise on the accuracy of a quantum clock is investigated, unveiling a necessary and sufficient requirement for accuracy that extends standard error-correcting conditions to quantum metrology.     Learning to Predict Arbitrary Quantum Processes Hsin-Yuan Huang, Sitan Chen, and John Preskill PRX Quantum 4, 040337 (2023) – Published 6 December 2023 A new machine-learning algorithm for predicting unknown quantum dynamics is presented.     Detecting High-Dimensional Entanglement in Cold-Atom Quantum Simulators Niklas Euler and Martin Gärttner PRX Quantum 4, 040338 (2023) – Published 7 December 2023 A general, experimentally accessible scheme to bound entanglement in a system of cold atoms in an optical lattice is presented.     Persistent Non-Gaussian Correlations in Out-of-Equilibrium Rydberg Atom Arrays Aydin Deger, Aiden Daniel, Zlatko Papić, and Jiannis K. Pachos PRX Quantum 4, 040339 (2023) – Published 8 December 2023 Long-lived non-Gaussian states are identified on Rydberg atom arrays, laying out a proposal for their observation and use as a stable resource for quantum information protocols.     Quantum State Smoothing Cannot Be Assumed Classical Even When the Filtering and Retrofiltering Are Classical Kiarn T. Laverick, Prahlad Warszawski, Areeya Chantasri, and Howard M. Wiseman PRX Quantum 4, 040340 (2023) – Published 11 December 2023 Classical smoothing theory is shown to not be always applicable to quantum systems, even when both the filtering and retrofiltering appear classical.     Statistical Phase Estimation and Error Mitigation on a Superconducting Quantum Processor Nick S. Blunt, Laura Caune, Róbert Izsák, Earl T. Campbell, and Nicole Holzmann PRX Quantum 4, 040341 (2023) – Published 12 December 2023 A phase-estimation method to find energies of quantum many-body systems is tested on a real quantum processor, combining statistical methods and error-mitigation techniques.     Strong Dispersive Coupling Between a Mechanical Resonator and a Fluxonium Superconducting Qubit Nathan R.A. Lee, Yudan Guo, Agnetta Y. Cleland, E. Alex Wollack, Rachel G. Gruenke, Takuma Makihara, Zhaoyou Wang, Taha Rajabzadeh, Wentao Jiang, Felix M. Mayor, Patricio Arrangoiz-Arriola, Christopher J. Sarabalis, and Amir H. Safavi-Naeini PRX Quantum 4, 040342 (2023) – Published 13 December 2023 The reach of circuit quantum acoustodynamics is expanded, providing a path for developing new quantum sensing and information processing schemes with phonons at frequencies below 700 MHz.     Many-Body Singlet Prepared by a Central-Spin Qubit Leon Zaporski, Stijn R. de Wit, Takuya Isogawa, Martin Hayhurst Appel, Claire Le Gall, Mete Atatüre, and Dorian A. Gangloff PRX Quantum 4, 040343 (2023) – Published 14 December 2023 A proposed quantum control protocol uses a central spin to prepare two spin ensembles in a singlet state.     Scalable Surface-Code Decoders with Parallelization in Time Xinyu Tan, Fang Zhang, Rui Chao, Yaoyun Shi, and Jianxin Chen PRX Quantum 4, 040344 (2023) – Published 15 December 2023 Leveraging parallelization in time, a scalable decoding paradigm for topological quantum error-correction codes effectively resolves the exponential backlog problem without compromising decoding accuracy.     Reconstructing Complex States of a 20-Qubit Quantum Simulator Murali K. Kurmapu, V.V. Tiunova, E.S. Tiunov, Martin Ringbauer, Christine Maier, Rainer Blatt, Thomas Monz, Aleksey K. Fedorov, and A.I. Lvovsky PRX Quantum 4, 040345 (2023) – Published 18 December 2023 A new quantum tomography method inspired by variational matrix-product-state ansatze is introduced and benchmarked in a 20-qubit quantum simulator.     Sideband Thermometry of Ion Crystals Ivan Vybornyi, Laura S. Dreissen, Dominik Kiesenhofer, Helene Hainzer, Matthias Bock, Tuomas Ollikainen, Daniel Vadlejch, Christian F. Roos, Tanja E. Mehlstäubler, and Klemens Hammerer PRX Quantum 4, 040346 (2023) – Published 20 December 2023 A new method for ion-trap thermometry is developed and tested, showing accuracy for large 1D and 2D ion crystals, accounting for quantum many-body effects.     Inferring Quantum Network Topology Using Local Measurements Daniel T. Chen, Brian Doolittle, Jeffrey Larson, Zain H. Saleem, and Eric Chitambar PRX Quantum 4, 040347 (2023) – Published 22 December 2023 Statistical correlations generated across the nodes of a quantum network are used to infer the network topology using entropic quantities.     Stability of the Many-Body Scars in Fermionic Spin-1/2 Models Patrice Kolb and Kiryl Pakrouski PRX Quantum 4, 040348 (2023) – Published 26 December 2023 Stability of quantum many-body scars in spin-1/2 fermionic systems under typical perturbations is investigated, revealing insights for experimental detection and theoretical and quantum computing applications.     Complexity-Theoretic Limitations on Quantum Algorithms for Topological Data Analysis Alexander Schmidhuber and Seth Lloyd PRX Quantum 4, 040349 (2023) – Published 28 December 2023 New insights on the hardness of topological data analysis and the possibility of quantum advantage.     Erratum: Role of Quantum Coherence in Thermodynamics [PRX Quantum 3, 040323 (2022)] Gilad Gour PRX Quantum 4, 040901 (2023) – Published 2 October 2023     American Physical Society: 1 Physics Ellipse, College Park, MD 20740 ©2024 American Physical Society | All rights reserved   You are receiving this email because you are subscribed to Table of Content alerts. 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