Quantum Journal
@quantum-journal.bsky.social
📤 174
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📝 19
Fresh in Quantum: Short remarks on shallow unitary circuits by Jeongwan Haah
doi.org/10.22331/q-2...
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Short remarks on shallow unitary circuits
Jeongwan Haah, Quantum 9, 1940 (2025). (i) We point out that every local unitary circuit of depth smaller than the linear system size is easily distinguished from a global Haar random unitary if there...
https://quantum-journal.org/papers/q-2025-12-11-1940/
2 days ago
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Published in Quantum: Proposal for a Bell Test with Entangled Atoms of Different Mass by X. T. Yan, S. Kannan, Y. S. Athreya, A. G. Truscott, and S. S. Hodgman
doi.org/10.22331/q-2...
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Proposal for a Bell Test with Entangled Atoms of Different Mass
X. T. Yan, S. Kannan, Y. S. Athreya, A. G. Truscott, and S. S. Hodgman, Quantum 9, 1939 (2025). We propose a Bell test experiment using momentum-entangled atom pairs of different masses, specifically...
https://quantum-journal.org/papers/q-2025-12-11-1939/
2 days ago
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Fresh in Quantum: Purely quantum memory in closed systems observed via imperfect measurements by Jorge Tabanera-Bravo and Aljaz Godec
doi.org/10.22331/q-2...
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Purely quantum memory in closed systems observed via imperfect measurements
Jorge Tabanera-Bravo and Aljaz Godec, Quantum 9, 1938 (2025). The detection and quantification of non-Markovianity, a.k.a. memory, in quantum systems is a central problem in the theory of open quantum...
https://quantum-journal.org/papers/q-2025-12-11-1938/
3 days ago
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Now in Quantum: Phase error rate estimation in QKD with imperfect detectors by Devashish Tupkary, Shlok Nahar, Pulkit Sinha, and Norbert Lütkenhaus
doi.org/10.22331/q-2...
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Phase error rate estimation in QKD with imperfect detectors
Devashish Tupkary, Shlok Nahar, Pulkit Sinha, and Norbert Lütkenhaus, Quantum 9, 1937 (2025). We present a finite-size security proof of the decoy-state BB84 QKD protocol against coherent attacks, using...
https://quantum-journal.org/papers/q-2025-12-11-1937/
3 days ago
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Published in Quantum: LUCI in the Surface Code with Dropouts by Dripto M. Debroy, Matt McEwen, Craig Gidney, Noah Shutty, and Adam Zalcman
doi.org/10.22331/q-2...
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LUCI in the Surface Code with Dropouts
Dripto M. Debroy, Matt McEwen, Craig Gidney, Noah Shutty, and Adam Zalcman, Quantum 9, 1936 (2025). Recently, usage of detecting regions facilitated the discovery of new circuits for fault-tolerantly...
https://quantum-journal.org/papers/q-2025-12-11-1936/
4 days ago
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Freshly published in Quantum: Quantum Galilei group as quantum reference frame transformations by Angel Ballesteros, Diego Fernandez-Silvestre, Flaminia Giacomini, and Giulia Gubitosi
doi.org/10.22331/q-2...
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Quantum Galilei group as quantum reference frame transformations
Angel Ballesteros, Diego Fernandez-Silvestre, Flaminia Giacomini, and Giulia Gubitosi, Quantum 9, 1935 (2025). Quantum groups have been widely explored as a tool to encode possible nontrivial generalisations...
https://quantum-journal.org/papers/q-2025-12-10-1935/
4 days ago
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Accepted and published in Quantum: Generalized Conditional Displacement by Shiran Even-Haim, Asaf A. Diringer, Ron Ruimy, Gefen Baranes, Alexey Gorlach, Shay Hacohen-Gourgy, and Ido Kaminer
doi.org/10.22331/q-2...
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Generalized Conditional Displacement
Shiran Even-Haim, Asaf A. Diringer, Ron Ruimy, Gefen Baranes, Alexey Gorlach, Shay Hacohen-Gourgy, and Ido Kaminer, Quantum 9, 1934 (2025). Conditional displacement with a qubit ancilla is a critical...
https://quantum-journal.org/papers/q-2025-12-10-1934/
5 days ago
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Fresh in Quantum: Multiple quantum exceptional, diabolical, and hybrid points in multimode bosonic systems: II. Nonconventional PT-symmetric dynamics and unidirectional coupling by Jan Perina Jr., Kishore Thapliyal, Grzegorz Chimczak, Anna ...
doi.org/10.22331/q-2...
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Multiple quantum exceptional, diabolical, and hybrid points in multimode bosonic systems: II. Nonconventional PT-symmetric dynamics and unidirectional coupling
Jan Perina Jr., Kishore Thapliyal, Grzegorz Chimczak, Anna Kowalewska-Kudlaszyk, and Adam Miranowicz, Quantum 9, 1933 (2025). We analyze the existence and degeneracies of quantum exceptional, diabolical,...
https://quantum-journal.org/papers/q-2025-12-10-1933/
5 days ago
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Newly published in Quantum: Multiple quantum exceptional, diabolical, and hybrid points in multimode bosonic systems: I. Inherited and genuine singularities by Kishore Thapliyal, Jan Perina Jr., Grzegorz Chimczak, Anna Kowalewska-Kudlaszyk,...
doi.org/10.22331/q-2...
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Multiple quantum exceptional, diabolical, and hybrid points in multimode bosonic systems: I. Inherited and genuine singularities
Kishore Thapliyal, Jan Perina Jr., Grzegorz Chimczak, Anna Kowalewska-Kudlaszyk, and Adam Miranowicz, Quantum 9, 1932 (2025). The existence and degeneracies of quantum exceptional, diabolical, and hybrid...
https://quantum-journal.org/papers/q-2025-12-10-1932/
6 days ago
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Recently published in Quantum: Expanding bipartite Bell inequalities for maximum multi-partite randomness by Lewis Wooltorton, Peter Brown, and Roger Colbeck
doi.org/10.22331/q-2...
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Expanding bipartite Bell inequalities for maximum multi-partite randomness
Lewis Wooltorton, Peter Brown, and Roger Colbeck, Quantum 9, 1930 (2025). Nonlocal tests on multi-partite quantum correlations form the basis of protocols that certify randomness in a device-independent...
https://quantum-journal.org/papers/q-2025-12-05-1930/
10 days ago
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Quantum has recently published: Stochastic approximate state conversion for entanglement and general quantum resource theories by Tulja Varun Kondra, Chandan Datta, and Alexander Streltsov
doi.org/10.22331/q-2...
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Stochastic approximate state conversion for entanglement and general quantum resource theories
Tulja Varun Kondra, Chandan Datta, and Alexander Streltsov, Quantum 9, 1929 (2025). Quantum resource theories provide a mathematically rigorous way of understanding the nature of various quantum resources....
https://quantum-journal.org/papers/q-2025-12-05-1929/
10 days ago
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New in Quantum: Optically Hyperpolarized Materials for Levitated Optomechanics by Marit O. E. Steiner, Julen S. Pedernales, and Martin B. Plenio
doi.org/10.22331/q-2...
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Optically Hyperpolarized Materials for Levitated Optomechanics
Marit O. E. Steiner, Julen S. Pedernales, and Martin B. Plenio, Quantum 9, 1928 (2025). We explore the potential of levitating solids embedded with non-permanent, optically controllable electron spins,...
https://quantum-journal.org/papers/q-2025-12-03-1928/
11 days ago
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Fresh in Quantum: Programming tools for Analogue Quantum Computing in the High-Performance Computing Context – A Review by Mateusz Meller, Vendel Szeremi, and Oliver Thomson Brown
doi.org/10.22331/q-2...
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Programming tools for Analogue Quantum Computing in the High-Performance Computing Context – A Review
Mateusz Meller, Vendel Szeremi, and Oliver Thomson Brown, Quantum 9, 1927 (2025). Recent advances in quantum computing have brought us closer to realizing the potential of this transformative technology....
https://quantum-journal.org/papers/q-2025-12-02-1927/
11 days ago
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Fresh in Quantum: Polynomial-Time Classical Simulation of Hidden Shift Circuits via Confluent Rewriting of Symbolic Sums by Matthew Amy and Lucas Shigeru Stinchcombe
doi.org/10.22331/q-2...
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Polynomial-Time Classical Simulation of Hidden Shift Circuits via Confluent Rewriting of Symbolic Sums
Matthew Amy and Lucas Shigeru Stinchcombe, Quantum 9, 1926 (2025). Implementations of Roetteler's shifted bent function algorithm have in recent years been used to test and benchmark both classical simulation...
https://quantum-journal.org/papers/q-2025-12-02-1926/
12 days ago
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Newly published in Quantum: All You Need is pi: Quantum Computing with Hermitian Gates by Ben Zindorf and Sougato Bose
doi.org/10.22331/q-2...
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All You Need is pi: Quantum Computing with Hermitian Gates
Ben Zindorf and Sougato Bose, Quantum 9, 1925 (2025). Universal gate sets for quantum computation, when single and two qubit operations are accessible, include both Hermitian and non-Hermitian gates....
https://quantum-journal.org/papers/q-2025-12-02-1925/
12 days ago
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Now in Quantum: Quantum Chaos and Universal Trotterisation Behaviours in Digital Quantum Simulations by Cahit Kargi, Angsar Manatuly, Lukas M. Sieberer, Juan Pablo Dehollain, Fabio Henriques, Tobias Olsacher, Philipp Hauke, Markus Heyl, Pet...
doi.org/10.22331/q-2...
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Quantum Chaos and Universal Trotterisation Behaviours in Digital Quantum Simulations
Cahit Kargi, Angsar Manatuly, Lukas M. Sieberer, Juan Pablo Dehollain, Fabio Henriques, Tobias Olsacher, Philipp Hauke, Markus Heyl, Peter Zoller, and Nathan K. Langford, Quantum 9, 1924 (2025). Digital...
https://quantum-journal.org/papers/q-2025-12-02-1924/
13 days ago
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Newly published in Quantum: Consistent circuits for indefinite causal order by Augustin Vanrietvelde, Nick Ormrod, Hlér Kristjánsson, and Jonathan Barrett
doi.org/10.22331/q-2...
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Consistent circuits for indefinite causal order
Augustin Vanrietvelde, Nick Ormrod, Hlér Kristjánsson, and Jonathan Barrett, Quantum 9, 1923 (2025). Over the past decade, a number of quantum processes have been proposed which are logically consistent,...
https://quantum-journal.org/papers/q-2025-12-02-1923/
13 days ago
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Newly published in Quantum: QRAM: A Survey and Critique by Samuel Jaques and Arthur G. Rattew
doi.org/10.22331/q-2...
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QRAM: A Survey and Critique
Samuel Jaques and Arthur G. Rattew, Quantum 9, 1922 (2025). Quantum random-access memory (QRAM) is a mechanism to access data (quantum or classical) based on addresses which are themselves a quantum state....
https://quantum-journal.org/papers/q-2025-12-02-1922/
14 days ago
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Hello world! The quantum journal is now on BlueSky!
about 1 year ago
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