Quantum Optics Digest

Saturday 12 September 2026 · weekly: 5 to read, 18 worth the title

2026-09-12T07:12:28+00:00

Superconducting quantum computing, weekly

91 TE Resilience Beyond the Light Cone: Error-Detected Primitives for Practical Dynamic Circuits
Kevin C. Smith, Bibek Pokharel, Satvik Maurya et al. · 2026-09-08
Ancilla-free error detection lifts a 100-qubit dynamic-circuit Bell pair from 0.39 to 0.59 fidelity, past the entanglement-certification threshold.
85 T Instantaneous-Frame Theory of Strongly Driven Parametric Gates
Kentaro Kubo, Shinichi Inoue, Jushin Tei et al. · 2026-09-08
Describing tunable-coupler gates in the instantaneous eigenbasis matches exact numerics where idle-frame models fail, cutting reliance on costly simulation for fast gates.
84 T A double-resonator coupler for high-fidelity two-qubit gates between superconducting qubits
Seunghyeon Jin, Seungha Woo, Shinyoung Hwang et al. · 2026-09-04
Two resonators bridged by one junction cancel residual ZZ far outside the straddling regime and give a 20 ns CZ below 1e-5 coherent infidelity.
82 TE Joint Mitigation of Algorithmic and Physical Errors in Noisy Hamiltonian Simulation
Shuo Zhou, Xinzhao Wang, Ruiqi Zhang et al. · 2026-09-10
Tying noise amplification to the Trotter step lets one Richardson extrapolation cancel both errors at constant overhead, shown on hardware and 100-qubit simulations.
80 T Josephson energy of superconducting junctions: amorphous versus crystalline tunnel barriers
Wanting Zhang, Aldilene Saraiva-Souza, Félix Beaudoin et al. · 2026-09-08
First-principles transport across ten amorphous barriers spreads Josephson energy over two orders of magnitude, tracing transmon scatter to Al-rich percolation paths.
79 T TETRIS-Q: Tiling-based Effective Transient-fault Reduction on Interleaved Superconducting Qubits
Marzio Vallero, Gioele Casagranda, Flavio Vella et al. · 2026-09-04
Phonon barriers plus interleaved code tiling cut radiation-induced logical errors by up to three orders of magnitude with no decoding-time penalty.
78 E Qubit-Based Benchmarking of InP HEMT LNAs: Readout Fidelity Versus Power Consumption
Junjie Li · 2026-09-07
Judging cryogenic HEMT amplifiers by single-shot IQ histograms: 60% indium beats 70%, and 0.3 mW already reaches 80% assignment fidelity.
77 T A Platform-aware Compilation Framework for Fault-tolerant Quantum Computation
Srushti Patil, Susan X. Chen, Andreas Juul Bay-Smidt et al. · 2026-09-08
Cross-platform compiler puts small-molecule eigenenergy estimation near 10^4 physical qubits, with runtimes from 100 ms on superconducting hardware to 10^5 ms on atoms.
76 T Single-tone drive-enhanced CROT gate for bosonic quantum error correction
Shushen Qin, Long D. H. My, Adrian Copetudo et al. · 2026-09-07
A single drive tone on a transmon coupled to two cavities yields a code-agnostic controlled-rotation gate for rotation-symmetric bosonic codes.
74 E Programmable CMOS DAC Operating in Cryogenic Environments for Controlling Superconducting Qubits
A. Pelteku, D. Reitz, M. Covington et al. · 2026-09-09
A 90 nm CMOS current source shapes flux pulses with digitally tunable amplitude and edge slopes at cryogenic temperatures, matching circuit predictions.
73 E High-Resolution Dynamical Eigenspectroscopy via Variational Trotter Compression on a Superconducting Qubit Processor
Liyang Sui, Xingrui Liu, Yufan Li et al. · 2026-09-05
Variational Trotter compression stretches usable evolution on nine qubits, recovering H2 and Fermi-Hubbard eigenenergies to 2e-3 including near-degenerate levels.
72 T Engineered two-photon dissipative confinement of a Kerr-cat qubit using SISIS quantum circuit refrigerator
Shumpei Masuda, Tsuyoshi Yamamoto, Shuji Nakamura et al. · 2026-09-10
Swapping the normal-metal island for a superconducting one makes circuit refrigeration absorb photon pairs, draining Kerr-cat leakage without the usual phase-flip penalty.
70 T Analog quantum simulation of bosonic and anyonic models with flux-driven transmons
Isak Lyngfelt, Jorge Fernández-Pendás, Göran Johansson et al. · 2026-09-03
Alternating flux modulation of coupled transmons tunes on-site interaction and density-dependent hopping, giving the first transmon protocol for anyon-Hubbard dynamics.
69 E Fabrication And Characterization Of High-Quality Nb/Al-AlO$_x$/Nb Cross-Type Josephson Tunnel Junctions Utilising CMP-based Planarisation Techniques
Alexander Stoll, Andreas Reifenberger, Daniel Hengstler et al. · 2026-09-08
Chemical-mechanical polishing replaces lift-off for Nb/Al-AlOx/Nb cross-type junctions, giving over 90% wafer-scale yield down to 1 micron squares.
67 TE Execution-transcript privacy for fault-tolerant surface-code memories
Jiachen Shen, Hui Zhong · 2026-09-08
Syndrome telemetry hides the logical state only to the Z-distance; a dZ=1 memory's record identifies its input with total variation 0.93.
63 E Post-fabrication trimming of a 1024-pixel, single-photon counting, Microwave Kinetic Inductance Detector array with a pixel pitch of 150 micron
Wilbert Ras-Vinke, Hessel Schulte, David J. Thoen et al. · 2026-09-09
Post-fabrication trimming cuts frequency scatter thirtyfold on a 1024-pixel kinetic-inductance array, lifting yield from 76% to 94% within one readout octave.
60 T Materials for Quantum Information Science: Roles in the Quantum Evolution 2.0
Thang Pham, Vsevolod Ivanov, Dominic P. Goronzy et al. · 2026-09-08
Review argues no platform yet links a specific atomic-scale structure to a measured coherence change, and names three characterization gaps to close.
58 E Junction-free polarity-tunable superconducting diode effect enables XNOR logic operation
Alapan Bera, Soumik Mukhopadhyay · 2026-09-08
Proximity to a ferromagnet gives junction-free NbSe2 30% diode efficiency at 50 mT, with switchable polarity driving a two-input XNOR gate.
57 E Low-Frequency Charge Noise in Bilayer Graphene Quantum Dots
Jessica Richter, Max J. Ruckriegel, Jonas D. Gerber et al. · 2026-09-03
Bilayer-graphene dots show 1.16 microeV per root-Hz charge noise at 1 Hz, matching established semiconductor platforms and insensitive to electrostatic tuning.
55 T Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions
Hao Dong, Xun-Jiang Luo, Xiao-Hong Pan et al. · 2026-09-10
Facet-dependent Andreev phase shifts put Majorana modes under phase-bias control in an altermagnetic weak link, with no fine-tuning to the Dirac point.
54 E Certifying bipartite entanglement on a superconducting processor from a corrected QAOA cost layer
Carlos-Miguel Lorenzo · 2026-09-08
Pre-registered five-qubit study certifies negativity 0.077 across six calibrations, but the certificate collapses by depth three with no optimisation signal.
52 T Dynamical Reduction of Two Series Josephson Junctions to a Synthetic High-Transparency Josephson Element
Claudio Guarcello, Sergio Pagano, Carlo Barone et al. · 2026-09-04
Mapping two series junctions onto one high-transparency element holds at low drive frequency and breaks down near the plasma frequency and large amplitudes.
50 T Néel-Vector Control of the Josephson Diode Effect in $\mathcal{PT}$-symmetric Antiferromagnets
Xian-Tang Xu, Xun-Jiang Luo, Mingliang Tian et al. · 2026-09-08
Rotating the Neel vector 90 degrees switches off both the diode effect and the phi-zero phase; reversing it flips the diode polarity.

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Saturday 12 September 2026: 0 to read, 0 worth the title

2026-09-12T09:23:20+00:00

Nothing scored above the threshold today.

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Friday 11 September 2026: 0 to read, 2 worth the title

2026-09-11T06:10:23+00:00

Superconducting artificial atoms

58 TE Full-Rank Noise Forbids Long-Range Entanglement Swapping
Xuan Du Trinh, Nicholas Pardave, Angie Huang et al. · 2026-09-10
Proves full-rank noise caps entanglement-swapping depth; superconducting-processor experiment shows rank-deficient links sustain concurrence where full-rank ones cannot.

Quantum optics on other platforms

63 E On-chip squeezed light in the audio frequency band
Xuezhi Zhu, Yunyun Cao, Rui Liu et al. · 2026-09-10
Demonstrates on-chip two-mode squeezing down to 60 Hz using a co-propagating electro-optic comb for phase-stable quadrature measurement, confirming entanglement.

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Thursday 10 September 2026: 1 to read, 12 worth the title

2026-09-10T12:14:19+00:00

Superconducting artificial atoms

84 E Experimental realization of quantum-computing-enhanced sensing
Yifang Xu, Hongwei Huang, Yilong Zhou et al. · 2026-09-07
Runs Grover search inside a microwave cavity of 128+ photons, with a transmon sensor turning an unknown signal into the oracle.
72 T Non-Hermitian topology in driven-dissipative systems: correspondence with quantum correlations and a resource for entanglement
Niladri Chakraborty, Clara C. Wanjura · 2026-09-08
Shows non-Hermitian topological amplifiers produce exponentially growing correlations between modes while entanglement stays local.
62 T Recovering Readout-Limited Fisher Information in Superconducting-Qubit Magnetometry with Squeezed Microwaves
M. -R. Yun, Y. -J. Qu, Zheng Shan et al. · 2026-09-08
Computes how squeezed-microwave dispersive readout recovers Fisher information lost in qubit state assignment, 27 percent sensitivity gain.
55 T Robustness of Dynamical Casimir Effect-Induced Quantum Synchronization
Sebastián Francisquez, Fernando C. Lombardo, Paula I. Villar · 2026-09-04
Tests whether dynamical-Casimir-induced synchronization of two qubits survives realistic cQED loss, dephasing dominates.
55 TE Strong-Drive Limits in Josephson Circuits: From Chaos to an Unbound-Resonance Threshold
Xinyuan You, Aniket Maiti, Yao Lu · 2026-09-04
Maps chaos and unbound-resonance thresholds for strongly driven Josephson circuits and confirms the flux-bias dependence in a SQUID.

Quantum optics on other platforms

75 E Efficient Conversion of Optical to Mechanical States Close to the Single-Quantum Level
Alexander Rolf Korsch, Liu Chen, Pedro V. Pinho et al. · 2026-09-03
Converts few-photon optical pulses to phonons at 76 percent efficiency in a millikelvin optomechanical crystal, HBT confirms coherence.
70 E Spin-to-polarization mapping with a coherent quantum dot-cavity receiver
Adrià Medeiros, Vincent Vinel, Eliott Rambeau et al. · 2026-09-03
A single reflected photon projects a quantum-dot spin with 95 percent fidelity via spin-dependent Kerr rotation.
68 E Telecom-Integrated Photonic Memory Operating Near the Mechanical Ground State
Jindao Tang, Bo Jing, Liping Zeng et al. · 2026-09-06
On-chip optomechanical memory stores telecom photons at 0.32 phonon occupancy with on-demand retrieval.
58 E Dual-Trigger of Series Nanowire Detector for Event-Based Photon Number Assignment
Stefanie Grotowski, Daniel Landes, Fabian Wietschorke et al. · 2026-09-08
Rising and falling edge triggering on a series SNSPD assigns photon number 1 to 3 per event and shows jitter falls with n.
55 E Generation of entanglement statistics with a large-scale integrated photonic-electronic circuit
Volkan Gurses, Ali Hajimiri · 2026-09-06
Mixes homodyne photocurrents from squeezed vacuum in a 32-channel RF network to certify two-mode entanglement electronically.
55 T Topological Edge States and Collective Radiation in a One-Dimensional Atomic Chain
Arda Deniz İyican, Ahmet Levent Subaşı, Özgür Çakır · 2026-09-07
Diatomic emitter chain in vacuum hosts topological edge states alongside sub- and superradiant modes, with far-field signatures.
50 T Finite-energy Gottesman-Kitaev-Preskill state-enhanced optical interferometry
Ashmita Roy, R. Srikanth, Deepak Pandey · 2026-09-07
Finite-energy GKP input beats squeezed vacuum in SU(2) and SU(1,1) interferometers at fixed envelope width.
50 T Fast universal parametric spin control in an acoustically modulated quantum dot
Mateusz Kuniej, Michał Gawełczyk · 2026-09-04
Parametric acoustic modulation of a dressed quantum-dot spin gives 155 ps X gates with arbitrary rotation axes.

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