Quantum Journal

Bridging Classical and Quantum Information Scrambling with the Operator Entanglement Spectrum Ben T. McDonough, Claudio Chamon, Justin H. Wilson, and Thomas Iadecola, Quantum 10, 2012 (2026). Universal features of chaotic quantum dynamics underlie our understanding of thermalization in closed...

Newly published in Quantum: Bridging Classical and Quantum Information Scrambling with the Operator Entanglement Spectrum by Ben T. McDonough, Claudio Chamon, Justin H. Wilson, and Thomas Iadecola doi.org/10.22331/q-2...

Universal and Efficient Quantum State Verification via Schmidt Decomposition and Mutually Unbiased Bases Yunting Li and Huangjun Zhu, Quantum 10, 2011 (2026). Efficient verification of multipartite quantum states is crucial to many applications in quantum information processing. By virtue of Schmidt decomposition...

Freshly published in Quantum: Universal and Efficient Quantum State Verification via Schmidt Decomposition and Mutually Unbiased Bases by Yunting Li and Huangjun Zhu doi.org/10.22331/q-2...

Self-restricting Noise and Exponential Relative Entropy Decay Under Unital Quantum Markov Semigroups Nicholas LaRacuente, Quantum 10, 2010 (2026). States of open quantum systems often decay continuously under environmental interactions. Quantum Markov semigroups model such processes in dissipative environments....

Newly published in Quantum: Self-restricting Noise and Exponential Relative Entropy Decay Under Unital Quantum Markov Semigroups by Nicholas LaRacuente doi.org/10.22331/q-2...

Coprime Bivariate Bicycle Codes and Their Layouts on Cold Atoms Ming Wang and Frank Mueller, Quantum 10, 2009 (2026). Quantum computing is deemed to require error correction at scale to mitigate physical noise by reducing it to lower noise levels while operating on...

Quantum has recently published: Coprime Bivariate Bicycle Codes and Their Layouts on Cold Atoms by Ming Wang and Frank Mueller doi.org/10.22331/q-2...

Generalized group designs: constructing novel unitary 2-, 3- and 4-designs Ágoston Kaposi, Zoltán Kolarovszki, Adrian Solymos, and Zoltán Zimborás, Quantum 10, 2008 (2026). Unitary designs are essential tools in several quantum information protocols. Similarly to other design...

New in Quantum: Generalized group designs: constructing novel unitary 2-, 3- and 4-designs by Ágoston Kaposi, Zoltán Kolarovszki, Adrian Solymos, and Zoltán Zimborás doi.org/10.22331/q-2...

Localizing multipartite entanglement with local and global measurements Christopher Vairogs, Samihr Hermes, and Felix Leditzky, Quantum 10, 2007 (2026). We study the task of localizing multipartite entanglement in pure quantum states onto a subsystem by measuring the remaining...

Fresh in Quantum: Localizing multipartite entanglement with local and global measurements by Christopher Vairogs, Samihr Hermes, and Felix Leditzky doi.org/10.22331/q-2...

Increasing the distance of topological codes with time vortex defects Gilad Kishony and Erez Berg, Quantum 10, 2006 (2026). We propose modifying topological quantum error correcting codes by incorporating space-time defects, termed “time vortices,'' to reduce the number...

Accepted and published in Quantum: Increasing the distance of topological codes with time vortex defects by Gilad Kishony and Erez Berg doi.org/10.22331/q-2...

Ideal stochastic process modeling with post-quantum quasiprobabilistic theories Kelvin Onggadinata, Andrew Tanggara, Mile Gu, and Dagomir Kaszlikowski, Quantum 10, 2005 (2026). In stochastic modeling, the excess entropy – the mutual information shared between a process's past and...

Published in Quantum: Ideal stochastic process modeling with post-quantum quasiprobabilistic theories by Kelvin Onggadinata, Andrew Tanggara, Mile Gu, and Dagomir Kaszlikowski doi.org/10.22331/q-2...

Complexity of geometrically local stoquastic Hamiltonians Asad Raza, Jens Eisert, and Alex B. Grilo, Quantum 10, 2004 (2026). The QMA-completeness of the local Hamiltonian problem is a landmark result of the field of Hamiltonian complexity that studies the computational...

Published in Quantum: Complexity of geometrically local stoquastic Hamiltonians by Asad Raza, Jens Eisert, and Alex B. Grilo doi.org/10.22331/q-2...

Theory of quantum error mitigation for non-Clifford gates David Layden, Bradley Mitchell, and Karthik Siva, Quantum 10, 2003 (2026). Quantum error mitigation techniques mimic noiseless quantum circuits by running several related noisy circuits and combining...

Fresh in Quantum: Theory of quantum error mitigation for non-Clifford gates by David Layden, Bradley Mitchell, and Karthik Siva doi.org/10.22331/q-2...

On Certified Randomness from Fourier Sampling or Random Circuit Sampling Roozbeh Bassirian, Adam Bouland, Bill Fefferman, Sam Gunn, and Avishay Tal, Quantum 10, 2002 (2026). Certified randomness has a long history in quantum information, with many potential applications. Recently...

Now in Quantum: On Certified Randomness from Fourier Sampling or Random Circuit Sampling by Roozbeh Bassirian, Adam Bouland, Bill Fefferman, Sam Gunn, and Avishay Tal doi.org/10.22331/q-2...

Minimising the number of edges in LC-equivalent graph states Hemant Sharma, Kenneth Goodenough, Johannes Borregaard, Filip Rozpędek, and Jonas Helsen, Quantum 10, 2001 (2026). Graph states are a powerful class of entangled states with numerous applications in...

Newly published in Quantum: Minimising the number of edges in LC-equivalent graph states by Hemant Sharma, Kenneth Goodenough, Johannes Borregaard, Filip Rozpędek, and Jonas Helsen doi.org/10.22331/q-2...

Bosonic quantum Fourier codes Anthony Leverrier, Quantum 10, 2000 (2026). While 2-level systems, aka qubits, are a natural choice to perform a logical quantum computation, the situation is less clear at the physical level. Encoding...

Quantum has recently published: Bosonic quantum Fourier codes by Anthony Leverrier doi.org/10.22331/q-2...

Trotter error and gate complexity of the SYK and sparse SYK models Yiyuan Chen, Jonas Helsen, and Maris Ozols, Quantum 10, 1999 (2026). The Sachdev–Ye–Kitaev (SYK) model is a prominent model of strongly interacting fermions that serves as a toy model of quantum gravity...

New in Quantum: Trotter error and gate complexity of the SYK and sparse SYK models by Yiyuan Chen, Jonas Helsen, and Maris Ozols doi.org/10.22331/q-2...

Variational quantum algorithms for permutation-based combinatorial problems: Optimal ansatz generation with applications to quadratic assignment problems and beyond Dylan Laplace Mermoud, Andrea Simonetto, and Sourour Elloumi, Quantum 10, 1998 (2026). We present a quantum variational algorithm based on a novel circuit that generates all permutations that can be spanned...

A new publication in Quantum: Variational quantum algorithms for permutation-based combinatorial problems: Optimal ansatz generation with applications to quadratic assignment problems and beyond by Dylan Laplace Mermoud, Andrea Simonetto, a... doi.org/10.22331/q-2...

A 3D lattice defect and efficient computations in topological MBQC Gabrielle Tournaire, Marvin Schwiering, Robert Raussendorf, and Sven Bachmann, Quantum 10, 1997 (2026). We describe an efficient, fully fault-tolerant implementation of Measurement-Based Quantum Computation...

Freshly published in Quantum: A 3D lattice defect and efficient computations in topological MBQC by Gabrielle Tournaire, Marvin Schwiering, Robert Raussendorf, and Sven Bachmann doi.org/10.22331/q-2...

Characterizing high-dimensional multipartite entanglement beyond Greenberger-Horne-Zeilinger fidelities Shuheng Liu, Qiongyi He, Marcus Huber, and Giuseppe Vitagliano, Quantum 10, 1995 (2026). Characterizing entanglement of systems composed of multiple particles is a very complex problem that is attracting...

Fresh in Quantum: Characterizing high-dimensional multipartite entanglement beyond Greenberger-Horne-Zeilinger fidelities by Shuheng Liu, Qiongyi He, Marcus Huber, and Giuseppe Vitagliano doi.org/10.22331/q-2...

Quantum Architecture Search with Unsupervised Representation Learning Yize Sun, Zixin Wu, Volker Tresp, and Yunpu Ma, Quantum 10, 1994 (2026). Unsupervised representation learning presents new opportunities for advancing Quantum Architecture Search (QAS) on Noisy Intermediate-Scale...

New in Quantum: Quantum Architecture Search with Unsupervised Representation Learning by Yize Sun, Zixin Wu, Volker Tresp, and Yunpu Ma doi.org/10.22331/q-2...

Parameter estimation for quantum jump unraveling Marco Radaelli, Joseph A. Smiga, Gabriel T. Landi, and Felix C. Binder, Quantum 10, 1993 (2026). We consider the estimation of parameters encoded in the measurement record of a continuously monitored...

Newly published in Quantum: Parameter estimation for quantum jump unraveling by Marco Radaelli, Joseph A. Smiga, Gabriel T. Landi, and Felix C. Binder doi.org/10.22331/q-2...

Scalable quantum simulator with an extended gate set in giant atoms Guangze Chen and Anton Frisk Kockum, Quantum 10, 1992 (2026). Quantum computation and quantum simulation require a versatile gate set to optimize circuit compilation for practical applications. However,...

New in Quantum: Scalable quantum simulator with an extended gate set in giant atoms by Guangze Chen and Anton Frisk Kockum doi.org/10.22331/q-2...

QMetro++ – Python optimization package for large scale quantum metrology with customized strategy structures Piotr Dulian, Stanisław Kurdziałek, and Rafał Demkowicz-Dobrzáski, Quantum 10, 1991 (2026). QMetro++ is a Python package that provides a set of tools for identifying optimal estimation protocols that...

Quantum has recently published: QMetro++ – Python optimization package for large scale quantum metrology with customized strategy structures by Piotr Dulian, Stanisław Kurdziałek, and Rafał Demkowicz-Dobrzáski doi.org/10.22331/q-2...

Multi-qubit Rydberg gates between distant atoms Antonis Delakouras, Georgios Doultsinos, and David Petrosyan, Quantum 10, 1990 (2026). We propose an efficient protocol to realize multi-qubit gates in arrays of neutral atoms. The atoms encode qubits...

Freshly published in Quantum: Multi-qubit Rydberg gates between distant atoms by Antonis Delakouras, Georgios Doultsinos, and David Petrosyan doi.org/10.22331/q-2...

NPA Hierarchy for Quantum Isomorphism and Homomorphism Indistinguishability Prem Nigam Kar, David E. Roberson, Tim Seppelt, and Peter Zeman, Quantum 10, 1989 (2026). Mančinska and Roberson [FOCS'20] showed that two graphs are quantum isomorphic if and only if they admit the...

Freshly published in Quantum: NPA Hierarchy for Quantum Isomorphism and Homomorphism Indistinguishability by Prem Nigam Kar, David E. Roberson, Tim Seppelt, and Peter Zeman doi.org/10.22331/q-2...

Characterising memory in quantum channel discrimination via constrained separability problems Ties-Albrecht Ohst, Shijun Zhang, Hai Chau Nguyen, Martin Plávala, and Marco Túlio Quintino, Quantum 10, 1988 (2026). Quantum memories are a crucial precondition in many protocols for processing quantum...

A new publication in Quantum: Characterising memory in quantum channel discrimination via constrained separability problems by Ties-Albrecht Ohst, Shijun Zhang, Hai Chau Nguyen, Martin Plávala, and Marco Túlio Quintino doi.org/10.22331/q-2...

A Computational Tsirelson’s Theorem for the Value of Compiled XOR Games David Cui, Giulio Malavolta, Arthur Mehta, Anand Natarajan, Connor Paddock, Simon Schmidt, Michael Walter, and Tina Zhang, Quantum 10, 1987 (2026). Nonlocal games are a foundational tool for understanding...

Now in Quantum: A Computational Tsirelson's Theorem for the Value of Compiled XOR Games by David Cui, Giulio Malavolta, Arthur Mehta, Anand Natarajan, Connor Paddock, Simon Schmidt, Michael Walter, and Tina Zhang doi.org/10.22331/q-2...

Fast-forwarding quantum algorithms for linear dissipative differential equations Dong An, Akwum Onwunta, and Gengzhi Yang, Quantum 10, 1986 (2026). We establish improved complexity estimates of quantum algorithms for linear dissipative ordinary differential equations (ODEs) and show...

Now in Quantum: Fast-forwarding quantum algorithms for linear dissipative differential equations by Dong An, Akwum Onwunta, and Gengzhi Yang doi.org/10.22331/q-2...

Quantum particle in the wrong box (or: the perils of finite-dimensional approximations) Felix Fischer, Daniel Burgarth, and Davide Lonigro, Quantum 10, 1985 (2026). When numerically simulating the unitary time evolution of an infinite-dimensional quantum system, one is usually led to treat...

Newly published in Quantum: Quantum particle in the wrong box (or: the perils of finite-dimensional approximations) by Felix Fischer, Daniel Burgarth, and Davide Lonigro doi.org/10.22331/q-2...

A Multilevel Framework for Partitioning Quantum Circuits Felix Burt, Kuan-Cheng Chen, and Kin K. Leung, Quantum 10, 1984 (2026). Executing quantum algorithms over distributed quantum systems requires quantum circuits to be divided into sub-circuits which communicate...

Quantum has recently published: A Multilevel Framework for Partitioning Quantum Circuits by Felix Burt, Kuan-Cheng Chen, and Kin K. Leung doi.org/10.22331/q-2...

Dissipation and non-thermal states in cryogenic cavities Zeno Bacciconi, Giulia Piccitto, Alessandro Maria Verga, Giuseppe Falci, Elisabetta Paladino, and Giuliano Chiriacò, Quantum 10, 1983 (2026). We study the properties of photons in a cryogenic cavity,...

Published in Quantum: Dissipation and non-thermal states in cryogenic cavities by Zeno Bacciconi, Giulia Piccitto, Alessandro Maria Verga, Giuseppe Falci, Elisabetta Paladino, and Giuliano Chiriacò doi.org/10.22331/q-2...

Recurrence in discrete-time quantum stochastic walks Martin Stefanak, Vaclav Potocek, Iskender Yalcinkaya, Aurel Gabris, and Igor Jex, Quantum 10, 1982 (2026). Interplay between quantum interference and classical randomness can enhance performance of various...

Fresh in Quantum: Recurrence in discrete-time quantum stochastic walks by Martin Stefanak, Vaclav Potocek, Iskender Yalcinkaya, Aurel Gabris, and Igor Jex doi.org/10.22331/q-2...