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A spectral unit

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-0997-3

Giacomo Prando summarizes the troubled history of the radian, a unit with the odd property of appearing and disappearing seemingly at will in dimensional formulas.

An ultracold junction

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1015-5

An ultracold junction

Test your theory

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1013-7

Test your theory

Spins sense fields

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1011-9

Spins sense fields

Black physicists matter

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1010-x

The persistent under-representation of Black physicists is a systemic problem that requires will, money and long-term commitment to be solved.

Unequal equals

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1014-6

Unequal equals

The unifying role of topology

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1001-y

The unifying role of topology

Lost and found

Nature Physics - 20 hours 42 min ago

Nature Physics, Published online: 04 August 2020; doi:10.1038/s41567-020-1012-8

Lost and found

Unscrambling entanglement through a complex medium

Nature Physics - Mon, 03/08/2020 - 00:00

Nature Physics, Published online: 03 August 2020; doi:10.1038/s41567-020-0970-1

Higher-dimensional entanglement between two photons can be preserved for a photon passing through a complex medium by applying an appropriate scrambling operation on the entangled partner that does not enter the complex medium.

A scramble to preserve entanglement

Nature Physics - Mon, 03/08/2020 - 00:00

Nature Physics, Published online: 03 August 2020; doi:10.1038/s41567-020-0976-8

A mooted advantage of high-dimensional states is their robustness to noise, yet their fragility in noisy channels has hindered their deployment. A demonstration shows how to exploit entanglement to restore quantum correlations lost in transmission.

Casimir spring and dilution in macroscopic cavity optomechanics

Nature Physics - Mon, 03/08/2020 - 00:00

Nature Physics, Published online: 03 August 2020; doi:10.1038/s41567-020-0975-9

An optomechanical cavity comprising a re-entrant cavity and membrane resonators can be tuned in and out of the Casimir regime. At the transition between the two regimes, the mechanical resonators exhibit a change in stiffness—the Casimir spring.

Resonant Andreev reflections probed by photon-assisted tunnelling at the atomic scale

Nature Physics - Mon, 27/07/2020 - 00:00

Nature Physics, Published online: 27 July 2020; doi:10.1038/s41567-020-0972-z

Scanning tunnelling microscopy is enhanced by microwave radiation that allows photon-assisted tunnelling processes. This technique is demonstrated on impurity states in a superconductor.

Exact theory for superconductivity in a doped Mott insulator

Nature Physics - Mon, 27/07/2020 - 00:00

Nature Physics, Published online: 27 July 2020; doi:10.1038/s41567-020-0988-4

The Mott insulator ground state is a crucial feature of high-temperature superconductors such as the cuprates. Here, the authors find an exactly solvable model that contains both superconductivity and Mottness.

Carriers that count

Nature Physics - Mon, 27/07/2020 - 00:00

Nature Physics, Published online: 27 July 2020; doi:10.1038/s41567-020-0979-5

An exactly solvable model for superconductivity includes two crucial features of the cuprates and sheds light on unexplained experiments.

Tunnelling dynamics between superconducting bound states at the atomic limit

Nature Physics - Mon, 27/07/2020 - 00:00

Nature Physics, Published online: 27 July 2020; doi:10.1038/s41567-020-0971-0

A magnetic impurity is placed on the tip of a scanning tunnelling microscope, allowing direct tunnelling between two Yu–Shiba–Rusinov bound states. This technique can probe and enhance the impurity state lifetime.

Visualization of the flat electronic band in twisted bilayer graphene near the magic angle twist

Nature Physics - Mon, 27/07/2020 - 00:00

Nature Physics, Published online: 27 July 2020; doi:10.1038/s41567-020-0974-x

The flat electronic bands that are associated with ordered phases in twisted bilayer graphene at a magic twist angle have been imaged using angle-resolved photoemission spectroscopy.

Chiral phonons in the pseudogap phase of cuprates

Nature Physics - Mon, 20/07/2020 - 00:00

Nature Physics, Published online: 20 July 2020; doi:10.1038/s41567-020-0965-y

Thermal transport measurements show that there is a thermal Hall effect in the out-of-plane direction in two cuprates in the pseudogap regime. This indicates that phonons are carrying the heat and that they have a handedness of unknown origin.

Photo-excitation of long-lived transient intermediates in ultracold reactions

Nature Physics - Mon, 20/07/2020 - 00:00

Nature Physics, Published online: 20 July 2020; doi:10.1038/s41567-020-0968-8

A transient intermediate complex in a chemical reaction—formed from collisions between molecules with a few atoms—is observed under ultracold conditions. Its lifetime can be directly measured after suppression of the photo-excitation process.

Implementation of a canonical phase measurement with quantum feedback

Nature Physics - Mon, 20/07/2020 - 00:00

Nature Physics, Published online: 20 July 2020; doi:10.1038/s41567-020-0939-0

An adaptive heterodyne technique with a Josephson parametric amplifier detector allows a high-precision single-shot canonical phase measurement on a one-photon wave packet, complementing near-ideal measurements of photon number or field amplitude.

Publisher Correction: Universal elastic mechanism for stinger design

Nature Physics - Wed, 15/07/2020 - 00:00

Nature Physics, Published online: 15 July 2020; doi:10.1038/s41567-020-0996-4

Publisher Correction: Universal elastic mechanism for stinger design

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