Tue, October 17, 2023

Professor Richard Fletcher wins 2023 Packard Award

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Fri, April 14, 2023

Measuring Arbitrary Physical Properties in Analog Quantum Simulation (Choi Group)

Quantum simulators—carefully engineered and programmable quantum systems—provide an exciting avenue to explore the laws of nature and to realize complex physical phenomena. However, current quantum simulators still lack the sophisticated controls needed to interrogate a prepared state in depth, limiting the information that can be extracted by measurements. Here, we propose a novel measurement protocol...

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Tue, April 11, 2023

Quantum Scrambling with Time-Reversal: A Powerful Tool for Exponentially Enhanced Metrology

The quantum analog of chaotic dynamics, quantum scrambling, spread quantum information exponentially fast within a quantum many-body system. Understanding how the information spread is a highly nontrivial and crucial question in the field of quantum information science (QIS). Recently, it has been theoretically argued that quantum scrambling is intimately connected with quantum metrology (QM), where...

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Tue, April 11, 2023

Field programmable spin arrays for scalable quantum repeaters

 In the progress report, it was noted that for “quantum computational advantage” in harnessing many-body quantum stages with spins, large scale control over thousands of spin qubits and their interaction was needed, but was limited by power consumption and cross-talk inherent in current microwave techniques. To this end, we analyzed the problem from first principles...

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Fri, March 10, 2023

Ben Augenbraun wins 2023 Jankunas Award

This award recognizes doctoral thesis research of outstanding quality and achievement in chemical physics. Three finalists will be invited to the APS March meeting to present 24-minute talks based on their thesis research.

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Wed, February 15, 2023

Engineers discover a new way to control atomic nuclei as “qubits”

In principle, quantum-based devices such as computers and sensors could vastly outperform conventional digital technologies for carrying out many complex tasks. But developing such devices in practice has been a challenging problem despite great investments by tech companies as well as academic and government labs. Today’s biggest quantum computers still only have a few hundred...

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Wed, February 1, 2023

Physicists observe rare resonance in molecules for the first time

If she hits just the right pitch, a singer can shatter a wine glass. The reason is resonance. While the glass may vibrate slightly in response to most acoustic tones, a pitch that resonates with the material’s own natural frequency can send its vibrations into overdrive, causing the glass to shatter. Resonance also occurs at...

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Tue, January 31, 2023

CUA Makes Physics World’s Top Ten of 2022

Physics World recognizes Professor John Doyle’s lab for creating some of the world’s first ultracold polyatomic molecules. The lab produced sodium hydroxide at 110 µK.

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Tue, November 22, 2022

Quantum entanglement between ultracold molecules in optical tweezer array

Molecular tweezer arrays provide a powerful and versatile platform for quantum computing and simulation applications. This is due to the long coherence time, strong dipole-dipole couplings between neighboring polar molecules, and single-site addressability in the system. Recently, by using the rotational states of single CaF molecules trapped in individual tweezers as effective qubits, we have...

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Mon, November 21, 2022

CUA researchers develop a new quantum processor with dynamic, nonlocal connectivity, utilizing the coherent transport of entangled atom arrays

The Harvard-MIT CUA collaboration led by Lukin, Greiner, and Vuletic reported a new architecture for quantum information processing using the coherent transport of neutral atoms in an optical tweezer array. This new processor has the unique capability of dynamic, nonlocal connectivity, enabling new types of quantum computations where any two qubits can be entangled, even...

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