Critical Quantum Sensing: a tutorial on parameter estimation near quantum phase transitions Quantum phenomena offer the possibility of measuring physical quantities with precision beyond classical limits. However, current progress is constrained by scalability, environmental noise, and chall...

Tutorial on Critical Quantum Sensing, an approach that exploits quantum phase transitions both as a conceptual framework and as practical tools in sensing and metrology.

We provide a pedagogical introduction to key concepts and a detailed overview of prominent strategies.
arxiv.org/abs/2510.02035

STOP STARVING GAZA NOW: The people of Gaza have called on us to act. We are joining the call to people of conscience to stand against the U.S.-backed Israeli-manufactured famine in Gaza. People of all age groups are being gruesomely starved, with deaths due to malnutrition on the rise every day.

Time correlations from steady-state expectation values Recovering properties of correlation functions is typically challenging. On one hand, experimentally, it requires measurements with a temporal resolution finer than the system's dynamics. On the other...

Extracting correlation functions is often challenging, both experimentally and theoretically. In this work, we leverage recent advances in quantum metrology to derive general lower bounds on correlation times that are straightforward to compute and experimentally accessible arxiv.org/abs/2507.08661

Pie chart showing Harvard NSF grant terminations

New: We have the list of ~190 Harvard NSF grant terminations from internal agency sources. About $148 million intended funds killed. Over 1/3 are from the MPS directorate—roughly 75 math and physics grants.

Excited to share that our latest work is now published in
PRX quantum! We explore quantum sensing beyond linear scaling in superconducting circuits by leveraging critical phenomena. Check it out: journals.aps.org/prxquantum/a...

Nonlinearity-driven Topology via Spontaneous Symmetry Breaking Topology and nonlinearity are deeply connected. However, whether topological effects can arise solely from the structure of nonlinear interaction terms, and the nature of the resulting topological pha...

New preprint: We show that, under parametric pumping, symmetry breaking can lead to a topological phase purely driven by nonlinear interactions -- a new mechanism for realizing topology in quantum resonator lattices
arxiv.org/abs/2503.11928

Team HQC

Kudos to the HQC team at EPFL who carried out the experiment www.epfl.ch/labs/hqc/team/

Observation of first- and second-order dissipative phase transitions in a two-photon driven Kerr resonator Nature Communications - Dissipative quantum phase transitions in open quantum systems have been extensively studied, but experiments have been mostly limited to first-order transitions. Here, the...

Excited to share our latest work, where we observe 1st and 2nd order dissipative phase transitions using a superconducting Kerr resonator with two-photon drive. This work deepens our understanding of nonequilibrium quantum systems and paves the way for quantum sensing application rdcu.be/ecUOu

Collective quantum enhancement in critical quantum sensing - Communications Physics Critical quantum sensing is now a well-established approach, based on the exploitation of quantum phase transitions. This work shows that a collective quantum advantage can be achieved when using coup...

Published on Communications Physics, our latest work on Critical Quantum Sensing. We derive analytical solutions for the low-energy spectrum and metrological power of an unconventional quantum many-body system, composed of an array of locally critical Kerr resonators:
www.nature.com/articles/s42...

Analog Quantum Teleportation Digital teleportation protocols make use of entanglement, local measurements and a classical communication channel to transfer quantum states between remote parties. We consider analog teleportation p...

New preprint with @rdicandia.bsky.social arxiv.org/abs/2502.10253

Digital Teleportation is based on measurement+feed-forward. In analog quantum teleportation these steps are replaced with squeezing+decoding. We identify a relevant parameter regime in which analog protocols are the optimal choice

Two senior postdoc positions are available within experimental quantum optics at the Niels Bohr Institute, University of Copenhagen

#QuantumOptics

www.quantiki.org/position/sen...

Literally every company now YouTube video by Eleanor Morton

Literally every company now

youtube.com/shorts/hL9pl...

"Quantum Communication and Sensing in the Microwave Regime" - You still have a couple of months to submit a manuscript to our focus collection on Communications Physics (Nature/Springer)
www.nature.com/collections/...

The Condensed Matter and quantum Information theory group at Scuola Normale Superiore is inviting to participate in Workshop on Criticality and Continuous Measurements in Quantum Sensing.

#QuantumSensing

quantiki.org/conference/w...

Criticality and Continuous Measurements in Quantum Sensing: From Theory to Experiments Critical quantum sensing is by now a well-established approach, based on the exploitation of the extreme sensitivity developed in proximity of phase transitions. Numerous theoretical studies and recen...

Workshop announcement!
“Criticality and Continuous Measurements in Quantum Sensing: from Theory to Experiments”
March 24-27, 2025, in Pisa, Italy, at the Scuola Normale Superiore
indico.sns.it/event/81/