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Experimental study of quantum thermodynamics using optical vortices
R Medeiros de Araújo, T Häffner, R Bernardi, D S Tasca, M P J Lavery, M J Padgett, A Kanaan, L C Céleri, P H Souto Ribeiro -
Probing quantum fluctuation theorems in engineered reservoirs
C Elouard, N K Bernardes, A R R Carvalho, M F Santos, A Auffèves -
Noncontextual Wirings
Barbara Amaral, Adán Cabello, Marcelo Terra Cunha, Leandro Aolita -
Relative phase shifts for metaplectic isotopies acting on mixed Gaussian states
Maurice A. de Gosson, Fernando NicacioWe address in this paper the notion of relative phase shift for mixed quantum systems. We study the Pancharatnam-Sjoeqvist phase shift for metaplectic isotopies acting on Gaussian mixed states. We complete and generalize previous results obtained by one of us while giving rigorous proofs. This gives us the opportunity to review and complement the theory of the Conley-Zehnder index which plays an essential role in the determination of phase shifts.
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Quantum walks via quantum cellular automata
Pedro C. S. Costa, Renato Portugal, Fernando de Melo
Very much as its classical counterpart, quantum cellular automata are expected to be a great tool for simulating complex quantum systems. Here we introduce a partitioned model of quantum cellular automata and show how it can simulate, with the same amount of resources (in terms of effective Hilbert space dimension), various models of quantum walks. All the algorithms developed within quantum walk models are thus directly inherited by the quantum cellular automata. The latter, however, has its structure based on local interactions between qubits, and as such it can be more suitable for present (and future) experimental implementations.
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Steady State Entanglement beyond Thermal Limits
F. Tacchino, A. Auffèves, M. F. Santos, D. GeraceClassical engines turn thermal resources into work, which is maximized for reversible operations. The quantum realm has expanded the range of useful operations beyond energy conversion, and incoherent resources beyond thermal reservoirs. This is the case of entanglement generation in a driven-dissipative protocol, which we hereby analyze as a continuous quantum machine. We show that for such machines the more irreversible the process, the larger the concurrence. Maximal concurrence and entropy production are reached for the hot reservoir being at negative effective temperature, beating the limits set by classic thermal operations on an equivalent system.
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Spin-imbalance in a 2D Fermi-Hubbard system
Peter T. Brown, Debayan Mitra, Elmer Guardado-Sanchez, Peter Schauß, Stanimir S. Kondov, Ehsan Khatami, Thereza Paiva, Nandini Trivedi, David A. Huse, Waseem S. Bakr -
Magnetism, transport, and thermodynamics in two-dimensional half-filled Hubbard superlattices
Rubem Mondaini, Thereza Paiva -
Shortcut to adiabaticity in a Stern-Gerlach apparatus
François Impens, David Guéry-Odelin -
Matter wave speckle observed in an out-of-equilibrium quantum fluid
Pedro E. S. Tavares, Amilson R. Fritsch, Gustavo D. Telles, Mahir S. Hussein, François Impens, Robin Kaiser, Vanderlei S. Bagnato -
Zero-dimensional limit of the two-dimensional Lugiato-Lefever equation
Wesley B. Cardoso, Luca Salasnich, Boris A. Malomed -
Approximate formulas for expectation values using coherent states
A L Foggiatto, R M Angelo, A D Ribeiro -
Hidden momentum and the Abraham-Minkowski debate
Pablo L. Saldanha, J. S. Oliveira Filho -
Experimental Minimum-Error Quantum-State Discrimination in High Dimensions
M. A. Solís-Prosser, M. F. Fernandes, O. Jiménez, A. Delgado, L. Neves -
Optimal probabilistic dense coding schemes
Roger A. Kögler, Leonardo Neves
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