PRX Quantum

On the cover of our latest issue: An all-electronic, trapped-ion architecture delivers ultra-high-fidelity quantum gates with low noise and crosstalk — pointing toward scalable, large-scale quantum computers. Read more: go.aps.org/3WfLDdv

Coupling a fluxonium control qubit to superconducting cavities suppresses detrimental inherited errors and nonlinearities, providing a robust alternative to transmon-based architectures for quantum computation. go.aps.org/4sp1G76

Join APS TV Host Clara Nellist as she sits down with the editors of PRX Intelligence, a new @APSPhysics journal. Watch them introduce their vision for a publication dedicated to research at the intersection of physics, AI & machine learning. #APSSummit26 youtu.be/3UpwDhHLGRE

A new approach to quantum state tomography, suitable for platforms where local control is difficult, can reconstruct quantum states with high accuracy and efficiency. go.aps.org/4sQzFFp

By violating a Bell-like inequality with a quantum switch, this experiment verifies indefinite causal order, meaning events can occur in a superposition of temporal sequences. Article: go.aps.org/47GoCqb Synopsis: go.aps.org/4bpQLD2

By implementing transversal gates directly on surface codes in systems with nonlocal connectivity, new cultivation protocols increase magic-state-generation rates by over a factor of 20 and achieve ultralow error rates. @yotamvaknin @ShohamJacoby go.aps.org/4cQh33M

Generalization of compact localized states to many-body systems with kinetic constraints and chiral symmetry reveals a new type of nonergodic eigenstate. go.aps.org/4utD3Yt

Causal inference techniques for characterizing latent variable models are generalized to characterize the quantum states compatible with some quantum network structure. go.aps.org/4bp61Ab

Modeling quantum supervised learning as thermodynamic cooling lets a refrigerator protocol boost sampling efficiency and cut overhead, avoiding complex algorithms like Grover iterations. Article: go.aps.org/4rxZOrF Synopsis: go.aps.org/3NzSAFx

Time-energy uncertainty relations are used to provide a semi-device-independent protocol for randomness certification. go.aps.org/3N8EOtn

A zigzag qubit configuration that enables noise-resilient state transfer and entanglement generation between distant qubits is analyzed and demonstrated on a superconducting quantum processor. go.aps.org/4s1HJmJ

Fundamental limits of adaptive measurement in quantum many-body systems are established, showing when logarithmic-sample prediction fails and how optimal algorithms can still be achieved. Read the paper: go.aps.org/4rwBiqY

Frequency-resolved photon detection can unlock hidden information in the light emitted by open quantum systems, enabling metrology that approaches fundamental limits using standard laboratory tools. @CarlosSMW @AVivasViana @iff_csic @chalmersuni go.aps.org/4aWEyH6

Adaptation of classical phase-retrieval yields a method for quantum phase estimation that enables simpler implementations with reduced gate count, especially under connectivity constraints, and resilience to shot noise. go.aps.org/4rbqqhG

Approximate 𝘬 designs can be generated from shallow circuits with limited magic gates as a new efficient and realistic approach to random unitaries. go.aps.org/4lcmITR

Fault-tolerant simulation of scalar field theory is improved using a finite-volume approach for computing scattering processes, and its potential for practical implementation is explored. go.aps.org/4rIMXDH

A beam-shaping approach enables efficient light coupling to 2D atomic tweezer arrays by matching their diffraction patterns, with interface efficiency scaling favorably with atom number and robustness to imperfections. go.aps.org/3N9ZJMA

Improved error-correcting codes and logical gates with promising characteristics are constructed and proven to be interconvertible among three relevant state spaces. go.aps.org/4u567pc

The display of memory effects in quantum dynamics is shown to depend on whether it is the quantum state or observable that is evolved. go.aps.org/3N6dDiG

Qubit shuttling may enable a scalable, fault-tolerant semiconductor spin-qubit architecture with all-to-all logical level connectivity. Read more: go.aps.org/4qRorPz

By combining quantum circuits with neural generative models, efficient and scalable quantum-enhanced sampling becomes feasible without precise circuit optimization. go.aps.org/4tRMzUP