Result

Work and entropy production in generalised Gibbs ensembles

Date: 
2015-12-01 - 2016-06-20
Author(s): 

M. Perarnau-Llobet, A. Riera, R. Gallego, H. Wilming, J. Eisert

Reference: 

arXiv:1512.03823

Recent years have seen an enormously revived interest in the study of thermodynamic notions in the quantum regime. This applies both to the study of notions of work extraction in thermal machines in the quantum regime, as well as to questions of equilibration and thermalisation of interacting quantum many-body systems as such.

Equilibration via Gaussification in fermionic lattice systems

Date: 
2016-01-01 - 2016-06-20
Author(s): 

M. Gluza, C. Krumnow, M. Friesdorf, C. Gogolin, J. Eisert

Reference: 

arXiv:1601.00671

The perspective of probing quantum many-body systems out of equilibrium under well controlled conditions is attracting enormous attention in recent years, a perspective that extends to the study of fermionic systems. In this work, we present an argument that precisely captures the dynamics causing equilibration and Gaussification under quadratic non-interacting fermionic Hamiltonians.

Experimentally accessible witnesses of many-body localisation

Date: 
2016-06-20
Author(s): 

M. Goihl, M. Friesdorf, A. H. Werner, W. Brown, J. Eisert

Reference: 

arXiv:1601.02666

The phenomenon of many-body localised (MBL) systems has attracted significant interest in recent years, for its intriguing implications from a perspective of both condensed-matter and statistical physics: they are insulators even at non-zero temperature and fail to thermalise, violating expectations from quantum statistical mechanics.

Direct certification of a class of quantum simulations

Date: 
2016-06-20
Author(s): 

D. Hangleiter, M. Kliesch, M. Schwarz, J. Eisert

Reference: 

arXiv:1602.00703

One of the main challenges in the field of quantum simulation and computation is to identify ways to certify the correct functioning of a device when a classical efficient simulation is not available. In such a situation one cannot simply classically keep track of the dynamics of the device.

Emergence of spontaneous symmetry breaking in dissipative lattice systems

Date: 
2016-06-20
Author(s): 

H. Wilming, M. J. Kastoryano, A. H. Werner, J. Eisert

Reference: 

arXiv:1602.01108

A cornerstone of the theory of phase transitions is the observation that many-body systems exhibiting a spontaneous symmetry breaking in the thermodynamic limit generally show extensive fluctuations of an order parameter in large but finite systems. In this work, we introduce the dynamical analogue of such a theory.

Continuous matrix product state tomography of quantum transport experiments

Date: 
2016-06-20
Author(s): 

G. Haack, A. Steffens, J. Eisert, R. Hübener

Reference: 

New J. Phys. 17, 113024 (2015)

In recent years, a close connection between the description of open quantum systems, the input-output formalism of quantum optics, and continuous matrix product states in quantum field theory has been established. So far, however, this connection has not been extended to the condensed-matter context.

Diagnosing Topological Edge States via Entanglement Monogamy

Date: 
2016-06-20
Author(s): 

K. Meichanetzidis, J. Eisert, M. Cirio, V. Lahtinen, and J. K. Pachos

Reference: 

Phys. Rev. Lett. 116, 130501 (2016); arXiv:1511.04459

Topological phases of matter possess intricate correlation patterns typically probed by entanglement entropies or entanglement spectra. In this Letter, we propose an alternative approach to assessing topologically induced edge states in free and interacting fermionic systems. We do so by focussing on the fermionic covariance matrix.

Power laws in the dynamic hysteresis of quantum nonlinear photonic resonators

Date: 
2016-03-10
Author(s): 

W. Casteels, F. Storme, A. Le Boité, and C. Ciuti

Reference: 

Phys. Rev. A 93, 033824 (2016)

We explore theoretically the physics of dynamic hysteresis for driven-dissipative nonlinear photonic resonators.

Truncated correlation hierarchy schemes for driven-dissipative multimode quantum systems

Date: 
2016-05-03
Author(s): 

Wim Casteels, Stefano Finazzi, Alexandre Le Boité, Florent Storme, Cristiano Ciuti

Reference: 

arXiv:1605.00882

We present a method to describe driven-dissipative multi-mode systems by considering a truncated hierarchy of equations for the correlation functions.

Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains

Date: 
2014-08-19
Author(s): 

Tomás Ramos, Hannes Pichler, Andrew J. Daley, Peter Zoller

Reference: 

Phys. Rev. Lett. 113, 237203 (2014)

We consider the non-equilibrium dynamics of a driven dissipative spin chain with chiral coupling to a 1D bosonic bath, and its atomic implementation with a two-species mixture of cold quantum gases. The reservoir is represented by a spin-orbit coupled 1D quasi-condensate of atoms in a magnetized phase, while the spins are identified with motional states of a separate species of atoms in an optical lattice.

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