Mysteriously Mundane Turbulence Revealed in 2D Superfluid

Submitted by bedfordb on

A new experiment let JQI researchers get an unprecedented look at the currents hiding in a superfluid. The technique they developed allows them to measure the fluid velocity at specific locations in a superfluid, opening new opportunities to investigate the dynamics of superfluids, including how they experience turbulence.

Probing Quantum Anomalous Hall States in Twisted Bilayer WSe2 via Attractive Polaron Spectroscopy

Submitted by mbritton on

Abstract: Moire superlattices in semiconductors are predicted to exhibit a rich variety of interaction-induced topological states. However, experimental demonstrations of such topological states, apart from MoTe2 superlattices [1–8], have remained scarce [9, 10]. Here, we report the first optical detection of quantum anomalous Hall (QAH) states in twisted WSe2 homobilayer (tWSe2).

Polarization-Preserving Quantum Frequency Conversion for Trapped-Ion Quantum Networking

Submitted by mbritton on

Abstract: While trapped ions are well-developed technologies for both quantum computation and simulation, incorporating them into nodes of a quantum network typically requires quantum frequency conversion (QFC). QFC extends the network's operating range given that most atomic ions emit polarization-entangled photons in the visible or near-infrared wavelengths.We demonstrate two-stage, polarization-preserving QFC for shifting Ba+ single photons upwards of 375 THz to the telecom O-band for quantum networking.

Curved Neutron Beams Could Deliver Benefits Straight to Industry

Submitted by bedfordb on

In a physics first, researchers have created a way to make beams of neutrons travel in curves. These Airy beams (named for English scientist George Airy), which the team created using a custom-built device, could enhance neutrons’ ability to reveal useful information about materials ranging from pharmaceuticals to perfumes to pesticides—in part because the beams can bend around obstacles. 

Fast noise-adaptive quasi-local decoders for topological quantum error correcting codes

Submitted by mbritton on

Abstract: There has been increasing interest in classifying mixed quantum states with topological order, particularly in understanding when states connected by local noise channels remain in the same topological phase. This framework has recently been applied to topological quantum error-correcting codes, where the use of the Petz recovery map has shown that phase transitions in mixed states align with the decodability threshold of these codes.

World Quantum Day AMA

Since 2022, JQI has hosted an Ask Me Anything (AMA) event in honor of World Quantum Day, a global celebration of quantum science and technology that encourages scientists to engage with and educate the general public. During the event, several researchers gather together and answer questions posed on Reddit. You can find direct links to our past threads below.

Hybrid Quantum Networking: Towards Interfacing Ions with Neutral Atoms

Submitted by mbritton on

Abstract: Building large-scale modular quantum computers and quantum networks require high fidelity, high efficiency, and long lifetime quantum memories [1]. Quantum memories are proposed to increase photon-mediatated matter-qubit entanglment rates by synchronizing photon interference between network nodes [2].

Error-corrected fermionic quantum processors with neutral atoms

Submitted by mbritton on

Abstract: Many-body fermionic systems can be simulated in a hardware-efficient manner using a fermionic quantum processor. Neutral atoms trapped in optical potentials can realize such processors, where non-local fermionic statistics are guaranteed at the hardware level. Implementing quantum error correction in this setup is however challenging, due to the atom-number superselection present in atomic systems, that is, the impossibility of creating coherent superpositions of different particle numbers.

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