439 citations · 699 across the 16 of their papers we have counts for
17 papers
Irreducible Architectures of Multipartite Entanglement
Augusto Smerzi, Manuel Gessner
Multipartite entanglement is commonly characterized by scalar notions such as separability and entanglement depth, which do not resolve the distribution of entangled cluster sizes.…
Maximal Fisher Budget Forces Blind Directions in Bipartite Collective SU(d) Metrology
Tariq Aziz, Naeem Akhtar, Dong Wang +1
For pure two-qudit probes used in a single fixed setting to estimate a common SU(d) transformation, maximal total Fisher sensitivity and full local identifiability are mutually exc…
Global Bounds beyond Local Quantum Metrology
Hai-Long Shi, Augusto Smerzi
Quantum Cramér--Rao theory is intrinsically local: it bounds precision near a specified parameter value, and its saturating measurement generally depends on that value. Barankin-ty…
Robust spin-squeezing with random interaction graphs: the lesson from universality
Andrea Solfanelli, Augusto Smerzi, Peter Zoller +1
We establish the conditions under which scalable spin squeezing can be achieved in interacting spin ensembles embedded in arbitrary, inhomogeneous graph geometries. We identify two…
Adversarial Stress Tests for Quantum Certification
Veronica Sanz, Augusto Smerzi
We develop a practical framework for semi-device-independent (SDI) certification under operational deviations from the ideal protocol model. Apparent violations of classical benchm…
Universal Manipulation of Quantum Synchronization in Spin Oscillator Networks
Shuo Dai, Zeqing Wang, Liang-Liang Wan +4
Quantum synchronization (QS) in open many-body systems offers a promising route for controlling collective quantum dynamics, yet existing manipulation schemes often rely on dissipa…
Scalable Network of Mach-Zehnder Interferometers with a Single Entangled Resource
Zhihui Yan, Yanni Feng, Luca Pezze +6
Distributed quantum sensing exploits entanglement to enhance the estimation of multiple parameters across a network of spatially-separated sensors, achieving sensitivities beyond t…
Molecular spin qudits to test generalized Bell inequalities
S. Macedonio, L. Lepori, A. Chiesa +10
We show that Yb(trensal) molecular nanomagnet, embedding an electronic spin qubit coupled to a nuclear spin qudit, provides an ideal platform to probe entanglement in a qubit-qudit…
Mach-Zehnder atom interferometry with non-interacting trapped Bose Einstein condensates
Tommaso Petrucciani, Andrea Santoni, Chiara Mazzinghi +7
The coherent manipulation of a quantum wave is at the core of quantum sensing. For instance, atom interferometers require linear splitting and recombination processes to map the ac…
Hong-Ou-Mandel interference of more than 10 indistinguishable atoms
Martin Quensen, Mareike Hetzel, Luis Santos +4
When two indistinguishable bosons interfere at a beam splitter, they both exit through the same output port. This foundational quantum-mechanical phenomenon, known as the Hong-Ou-M…
Self-induced Josephson oscillations and self-trapping in a supersolid dipolar quantum gas
Beatrice Donelli, Nicolò Antolini, Giulio Biagioni +8
The Josephson effect characterizes superfluids and superconductors separated by a weak link, the so-called Josephson junction. A recent experiment has shown that Josephson oscillat…
Fundamental bounds for parameter estimation with few measurements
Valentin Gebhart, Manuel Gessner, Augusto Smerzi
Bounding the optimal precision in parameter estimation tasks is of central importance for technological applications. In the regime of a small number of measurements, or that of lo…
Measuring geometric phases with a dynamical quantum Zeno effect in a Bose-Einstein condensate
H. V. Do, M. Gessner, F. S. Cataliotti +1
A closed-trajectory evolution of a quantum state generally imprints a phase that contains both dynamical and geometrical contributions. While dynamical phases depend on the referen…
Interaction-free measurements by quantum Zeno stabilisation of ultracold atoms
J. Peise, B. Lücke, L. Pezzè +6
Quantum mechanics predicts that our physical reality is influenced by events that can potentially happen but factually do not occur. Interaction-free measurements (IFMs) exploit th…
Nonlocality with ultracold atoms in a lattice
S. Pelisson, L. Pezzé, A. Smerzi
We sudy the creation of nonlocal states with ultracold atoms trapped in an optical lattice. We show that these states violate Bell inequality by measuring one- and two-body correla…
Experimental realization of quantum zeno dynamics
Florian Schäfer, Ivan Herrera, Shahid Cherukattil +4
It is generally impossible to probe a quantum system without disturbing it. However, it is possible to exploit the back-action of quantum measurements and strong couplings to tailo…
Twin matter waves for interferometry beyond the classical limit
Bernd Lücke, Manuel Scherer, Jens Kruse +10
Interferometers with atomic ensembles constitute an integral part of modern precision metrology. However, these interferometers are fundamentally restricted by the shot noise limit…