J. I. Cirac
Max Planck Society
448 Papers
3.8K Citations
J. I. Cirac is an academic researcher from Max Planck Society. The author has contributed to research in topics: Quantum entanglement & Quantum information. The author has an hindex of 114, co-authored 417 publications. Previous affiliations of J. I. Cirac include Harvard University & University of Innsbruck.
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Papers
Variational ansatz for the superfluid Mott-insulator transition in optical lattices
Juan José García-Ripoll,J. I. Cirac,Peter Zoller,Corinna Kollath,Ulrich Schollwöck,J. von Delft +5 more
TL;DR: A variational wave function for the ground state of a one-dimensional bosonic lattice gas that accurately gives local properties for strong and weak interactions, and it also describes the crossover from the superfluid phase to the Mott-insulator phase.
Multimode Fock states with large photon number: effective descriptions and applications in quantum metrology
TL;DR: In this paper, the authors derived a simple expression for the Quantum Fisher Information in terms of the average photon number in each mode, and showed that it can be saturated by number-resolved photon measurements that do not distinguish between the different $d$ modes.
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How Much Entanglement Can Be Generated between Two Atoms by Detecting Photons
TL;DR: It is possible to achieve an arbitrary amount of entanglement between two atoms using only spontaneously emitted photons, linear optics, single-photon sources, and projective measurements.
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Effective many-body Hamiltonians of qubit-photon bound states
Tao Shi,Tao Shi,Ying-Hai Wu,Ying-Hai Wu,Alejandro González-Tudela,Alejandro González-Tudela,J. I. Cirac +6 more
TL;DR: In this article, the authors study the emergence of non-Markovian or strong coupling regime in different excitation subspaces, uncovering the existence of doublons or triplon states.
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Quantum communication in a quantum network
TL;DR: In this paper, a physical implementation for quantum communication in quantum networks is proposed, which demonstrates how to transfer quantum information between spatially separated atoms, which are each inside a high-Q optical cavity, and how to establish a distant maximally entangled pair, by sending photons through a general, noisy channel, such as a standard optical fiber.
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