Publications
2022
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Importance sampling for stochastic quantum simulations
Oriel Kiss, Michele Grossi, and Alessandro Roggero
arXiv:2212.05952 [quant-ph]Simulating complex quantum systems is a promising task for digital quantum computers. However, the depth of popular product formulas scales with the number of summands in the Hamiltonian, which can therefore be challenging to implement on near-term …
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Frustrated magnets without geometrical frustration in bosonic flux ladders
Luca Barbiero, Josep Cabedo, Maciej Lewenstein, Leticia Tarruell, and Alessio Celi
Phys. Rev. Research 5, L042008 () | arXiv:2212.06112 [cond-mat.quant-gas]We propose a scheme to realize a frustrated Bose-Hubbard model with ultracold atoms in an optical lattice that comprises the frustrated spin-1/2 quantum XX model. Our approach is based on a square ladder of magnetic flux ∼π with one real and one …
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Enhancing Qubit Readout with Autoencoders
Piero Luchi, Paolo E. Trevisanutto, Alessandro Roggero, Jonathan L. DuBois, Yaniv J. Rosen, Francesco Turro, Valentina Amitrano, and Francesco Pederiva
arXiv:2212.00080 [quant-ph]In addition to the need for stable and precisely controllable qubits, quantum computers take advantage of good readout schemes. Superconducting qubit states can be inferred from the readout signal transmitted through a dispersively coupled resonator. …
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Linear maps as sufficient criteria for entanglement depth and compatibility in many-body systems
Maciej Lewenstein, Guillem Müller-Rigat, Jordi Tura, and Anna Sanpera
Open Systems & Information Dynamics Vol. 29, No. 03, 2250011 | arXiv:2211.02871 [quant-ph]Physical transformations are described by linear maps that are completely positive and trace preserving (CPTP). However, maps that are positive (P) but not completely positive (CP) are instrumental to derive separability/entanglement criteria. …