New Quantum Record: Transmon Qubit Coherence Reaches Millisecond Threshold

Andrew Houck, national leader in quantum technology, appointed Princeton University dean of engineering

Houck, co-director of the Princeton Quantum Initiative and the Anthony H.P. Lee ’79 Professor of Electrical and Computer Engineering, will begin his tenure as dean of the University’s School of Engineering and Applied Science on Aug. 1.

Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds

Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T1 lifetime of 503 μs. As a comparison, we also fabricated transmon qubits with other popular materials, including niobium and aluminum, under the same design and fabrication processes. After characterizing their coherence properties, we found…

New quantum record: Transmon qubit coherence reaches millisecond threshold

On July 8, 2025, physicists from Aalto University in Finland published a transmon qubit coherence measurement in Nature Communications that dramatically surpasses previous scientifically published records. The millisecond coherence measurement marks a quantum leap in computational technology, with the previous maximum echo coherence measurements approaching 0.6 milliseconds.

Quantum Thermometry Accurately Measures Temperature, Reducing Noise In Systems

Precise temperature estimation of quantum systems, vital for mitigating decoherence arising from thermal fluctuations, achieves a fundamental precision limit dictated by the number of field excitations, as demonstrated through analytical analysis and digital simulation of a nonlinear Mach-Zehnder interferometer capable of probing atomic ensembles across a range of temperatures, including effective negative temperatures.

New quantum record: Transmon qubit coherence reaches millisecond threshold - Tech and Science Post

On July 8, 2025, physicists from Aalto University in Finland published a transmon qubit coherence measurement in Nature Communications that dramatically surpasses previous scientifically published records. The millisecond coherence measurement marks a quantum leap in computational technology, with the previous maximum echo coherence measurements approaching 0.6 milliseconds. Longer qubit coherence allows for an extended window of time in which q…