…Can physics be simulated by a universal computer?

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1 …Can physics be simulated by a universal computer?
Richard P. Feynman, Int. J. Theor. Phys 21, 467 (1982) Richard P. Feynman realized that certain phenomena in Quantum Field Theory are well imitated by certain Condensed Matter systems… He thought that there should be a certain class of quantum mechanical systems which would simulate any other system, a UNIVERSAL QUANTUM SIMULATOR that could serve as a quantum laboratory where the validity of several theoretical models may be tested. L. Fallani and M. Inguscio Controlling cold-atom conductivity Science 322 (5th December 2008)

2 Ballistic expansion with reduced velocity
Absence of diffusion G. Roati et al., Nature 453, 895 (2008) =0 Ballistic expansion: J=1 Ballistic expansion with reduced velocity J=7 Absence of diffusion:

3 Disorder is beautiful

4 Chiara Fort Marco Fattori Giovanni Modugno Giacomo Roati

5 39K: un gas con interazione tunabile

6 Nuovo progetto: apparato sperimentale in costruzione
Marco Fattori Ammesso al secondo step: Firb Futuro in Ricerca (INFN) ERC starting grant (INO-CNR) GIOVANNI MODUGNO - segue

7 Nuovo progetto: apparato sperimentale in costruzione

8 Fenomeni a molti corpi con gas quantistici di atomi e molecole
Giovanni Modugno Fenomeni a molti corpi con gas quantistici di atomi e molecole QUPOL – ERC Starting Grant MICRA – INFN EUROQUASAR ESF (CNR-INO) NAMEQUAM EU FP7 AQUTE EU FP7

9 Interferometria atomica con BECs intrappolati non interagenti
Soppressione della decoerenza indotta dall’interazione 100a0 1a0 time M. Fattori, et al., PRL 100, (2008) M. Fattori, et al. PRL 101, (2008) Vantaggi offerti Lunghi tempi di interrogazione Sensore estremamente compatto Elevata risoluzione spaziale ~ mm

10 Particelle entangled usando l’interazione
Nuovo progetto: interferometro atomico al limite Heisenberg Costruzione di un interferometro Mach-Zender spaziale, il cui funzionamento richiede l’uso di atomi non interagenti Particelle entangled usando l’interazione Perticelle scorrelate Ingresso beam splitter shift di fase f L R beam splitter misura Df ~ 1/ (Limite Shot Noise) Df ~ 1/N (Heisenberg limit)

11 Federico Capasso

12 Federico Capasso - Harvard
FOTONICA al THz Joint venture Dip Fisica ed Astronomia – INO-CNR – LENS – Max Planck

13 Quantum information with ytterbium
Leonardo Fallani, Jacopo Catani Cancio Pastor,, Giusfredi, De Natale Quantum information with ytterbium New experimental system for laser cooling and trapping two-electron atomic ytterbium Rich level structure (metastable states) Several stable isotopes Optical clocks technology Good candidate for quantum information processing with neutral atoms! Funded by: IIT – ENCORE Seed Project EU FP7 – AQUTE Integrated Project MAE – Progetto UVICOLS

14 Quantum information with ytterbium
Easy encoding and long-term storage of quantum information in low-decoherence internal subspaces electronic qubits nuclear qubits clock transition: long coherence times purely nuclear spin (fermions): small sensitivity to stray fields decoupled from the electronic d.o.f.

15 Quantum information with ytterbium
Quantum register with Yb atoms trapped in optical lattices High-res imaging + optical tweezing for addressing and manipulating qubits r/w addressability and manipulation atoms = qbits optical lattice Creation of entanglement between individually addressed qbits

16 Quantum interfaces photons atoms ions
Connecting different quantum systems Hybrid systems for QIPC photons flying qubits atoms ions Yb, Li, Rb Yb+ scalable quantum registers long coherence times multi-particle entanglement fast gates

17 2 species of atoms in optical lattices mimick spin models:
Francesco Minardi (INO-CNR) Giacomo Lamporesi, Jacopo Catani Simulation of magnetic models 2 species of atoms in optical lattices mimick spin models: ferromagnets, antiferromagnets, supersolids... Optical lattices make low-dimensional and even mixed-dimensional systems Gas quantistici, U.O.S. Sesto Fiorentino

18 Scattering of particles living in different dimensions (2D/3D)
Scattering in mixed dimensions with ultracold gases Scattering of particles living in different dimensions (2D/3D) Observed scattering resonances induced by mixed-dimensionality G. Lamporesi, J. Catani, G. Barontini, Y. Nishida, M. Inguscio, F. Minardi, submitted to Phys. Rev. Lett., arXiv Gas quantistici, U.O.S. Sesto Fiorentino

19 Entropy control of quantum gases
Motivation: quantum simulations with degenerate atomic gases require very low entropy Idea: with two atomic gases (K, Rb) in thermal equilibrium, selective compression of one component (K) transfers entropy from the compressed to the uncompressed gas. Experimental signature: K atoms are driven to Bose-Einstein condensation regime in a reversible and controlled way J. Catani, G. Barontini, G. Lamporesi, F. Rabatti, G. Thalhammer, F. Minardi, S. Stringari, and M. Inguscio, Phys. Rev. Lett. 103, (2009) [viewpoint: D. Stamper-Kurn, Physics 2, 80 (2009)] Gas quantistici, U.O.S. Sesto Fiorentino

20 Giacomo Roati

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23 STRATEGIE Finanziamenti Spazi Risorse umane

24 Finanziamenti Europei: - Integrated Project SCALA ( ) 170 kEuro - EuroQuam DQS ( ), 100 kEuro Nazionali: - SQUATSuper ( ), INFN, gruppo V, 30 kEuro