Tag Archives: Quantum Mechanics

Quantum Measurement Strikes a Balance

Posted on February 3, 2022 by rberkowitz

An experiment demonstrates the trade-off between measurement and total information content—comprising gain, disturbance, and reversibility—in a quantum system. Continue reading →

Posted in APS Physics | Tagged , , | Leave a comment

Low-Loss Quantum Buses for Photons

Posted on August 13, 2021 by rberkowitz

Researchers demonstrate a way to shuttle photons between modules of a quantum processor that can detect and correct communication losses. Continue reading →

Posted in Uncategorized | Tagged , | Leave a comment

The Smallest Quantum Computer Yet

Posted on June 26, 2021 by rberkowitz

A trapped-ion-based quantum computer that fits in two boxes, each the size of a studio apartment’s shower, can create a fully entangled 24-particle quantum state. Continue reading →

Posted in APS Physics | Tagged , | Leave a comment

Large systems can be controllably entangled and limitlessly measured

Posted on May 27, 2021 by rberkowitz

A mechanical oscillator has quantum properties that can be directly observed. Read more in APS Physics…

Posted in Physics Today | Tagged , , | Leave a comment

Efficient Detection of Microwave Photons

Posted on May 18, 2020 by rberkowitz

A new single-photon detector minimizes false positives by ensuring that a qubit switches to its excited state if and only if a photon enters a microwave resonator.  Continue reading →

Posted in APS Physics | Tagged , | Leave a comment

Localized electric field manipulates a nuclear spin

Posted on May 2, 2020 by rberkowitz

The atom-level control could provide the precision required for some quantum computing applications. Continue reading →

Posted in Physics Today | Tagged , | Leave a comment

Excited Molecules Escape Their Trap

Posted on April 24, 2020 by rberkowitz

The loss of ultracold molecules from an optical trap comes from optical excitation of the complexes that form when two of the molecules collide.  Continue reading →

Posted in APS Physics | Tagged , , | Leave a comment

Localized electric field manipulates a nuclear spin

Posted on April 9, 2020 by rberkowitz

Nuclear electric resonance provides the atom-level control required for some quantum computing applications.  Continue reading →

Posted in Physics Today | Tagged , , | Leave a comment

A Time Crystal Without a Driver

Posted on December 13, 2019 by rberkowitz

A calculation shows that an elusive, isolated quantum time crystal may not be far from reality. Continue reading →

Posted in APS Physics | Tagged , | Leave a comment

The hydrodynamics of a quantum fluid

Posted on May 1, 2019 by rberkowitz

The behavior of a one-dimensional gas of ultracold atoms confirms a generalized theory. Continue reading →

Posted in Physics Today | Tagged , , , | Leave a comment