Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Chandran, Anushya"'
Floquet engineering, in which the properties of a quantum system are modified through the application of strong periodic drives, is an indispensable tool in atomic and condensed matter systems. However, it is inevitably limited by intrinsic heating p
Externí odkaz:
http://arxiv.org/abs/2410.12908
A Thouless pump is a slowly driven one-dimensional band insulator which pumps charge at a quantised rate. Previous work showed that pumping persists in weakly disordered chains, and separately in clean chains at finite drive frequency. We study the i
Externí odkaz:
http://arxiv.org/abs/2401.17395
Publikováno v:
Phys. Rev. Lett. 133, 060802, 2024
Shadow tomography aims to build a classical description of a quantum state from a sequence of simple random measurements. Physical observables are then reconstructed from the resulting classical shadow. Shadow protocols which use single-body random m
Externí odkaz:
http://arxiv.org/abs/2311.09291
Publikováno v:
Phys. Rev. Lett. 132, 100401 (2024)
Systems subject to high-frequency driving exhibit Floquet prethermalization, that is, they heat exponentially slowly on a time scale that is large in the drive frequency, $\tau_{\rm h} \sim \exp(\omega)$. Nonetheless, local observables can decay much
Externí odkaz:
http://arxiv.org/abs/2306.16716
Publikováno v:
SciPost Phys. 15, 251 (2023)
Many problems in quantum dynamics can be cast as the decay of a single quantum state into a continuum. The time-dependent overlap with the initial state, called the fidelity, characterizes this decay. We derive an analytic expression for the fidelity
Externí odkaz:
http://arxiv.org/abs/2306.16457
Local random circuits scramble efficiently and accordingly have a range of applications in quantum information and quantum dynamics. With a global $U(1)$ charge however, the scrambling ability is reduced; for example, such random circuits do not gene
Externí odkaz:
http://arxiv.org/abs/2306.01035
A qubit driven by two incommensurate frequencies can mediate a quantised average energy current in the adiabatic limit. We show that non-adiabatic processes result in reversals of the energy current and corresponding oscillations in the net energy tr
Externí odkaz:
http://arxiv.org/abs/2304.01254
Publikováno v:
SciPost Phys. 15, 030 (2023)
Central spin models provide an idealized description of interactions between a central degree of freedom and a mesoscopic environment of surrounding spins. We show that the family of models with a spin-1 at the center and XX interactions of arbitrary
Externí odkaz:
http://arxiv.org/abs/2212.04477
Publikováno v:
Phys. Rev. B 106, 144203 (2022)
Quasiperiodically driven fermionic systems can support topological phases not realized in equilibrium. The fermions are localized in the bulk, but support quantized energy currents at the edge. These phases were discovered through an abstract classif
Externí odkaz:
http://arxiv.org/abs/2208.06419
Publikováno v:
Phys. Rev. Lett. 131, 106301 (2023)
The dynamical phase diagram of interacting disordered systems has seen substantial revision over the past few years. Theory must now account for a large prethermal many-body localized (MBL) regime in which thermalization is extremely slow, but not co
Externí odkaz:
http://arxiv.org/abs/2207.05761