Materials consisting of a stack of “two-dimensional” layers that exhibit 2D power-law order in the absence of coupling between layers include systems as diverse as layered magnets, DNA-lipid complexes, and coupled Luttinger liquids. It is common belief that these systems exhibit “three-dimensional” order whenever there is a nonvanishing interlayer coupling. However, with appropriately chosen interlayer gradient couplings between layers, they can exhibit unusual equilibrium “Sliding Phases” characterized by 2D-like power-law correlations. After reviewing the various types of sliding phases that can occur, this paper will discuss in detail the properties of the simplest sliding phases, the sliding xy phases in three-dimensional stacks of planar xy models. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.Materials consisting of a stack of “two-dimensional” layers that exhibit 2D power-law order in the absence of coupling between layers include systems as diverse as layered magnets, DNA-lipid complexes, and coupled Luttinger liquids. It is common belief that these systems exhibit “three-dimensional” order whenever there is a nonvanishing interlayer coupling. However, with appropriately chosen interlayer gradient couplings between layers, they can exhibit unusual equilibrium “Sliding Phases” characterized by 2D-like power-law correlations. After reviewing the various types of sliding phases that can occur, this paper will discuss in detail the properties of the simplest sliding phases, the sliding xy phases in three-dimensional stacks of planar xy models. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Birkhäuser Basel eBooksJan 1, 20030 citations

Coherent control of biomolecules

Janne Savolainen

May 16, 20084 citations

Observation of a Dynamical Sliding Phase Superfluid with P -Band Bosons

Linxiao Niu, Shengjie Jin, Xuzong Chen +2 more

Sliding phases have been long sought after in the context of coupled XY models, as they are of relevance to various many-body systems such as layered superconductors, freestanding liquid-crystal films, and cationic lipid-DNA complexes. Here we report an observation of a dynamical sliding phase superfluid that emerges in a nonequilibrium setting from the quantum dynamics of a three-dimensional ultracold atomic gas loaded into the P band of a one-dimensional optical lattice. A shortcut loading method is used to transfer atoms into the P band at zero quasimomentum within a very short time duration. The system can be viewed as a series of "pancake"-shaped atomic samples. For this far-out-of-equilibrium system, we find an intermediate time window with a lifetime around tens of milliseconds, where the atomic ensemble exhibits robust superfluid phase coherence in the pancake directions, but no coherence in the lattice direction, which implies a dynamical sliding phase superfluid. The emergence of the sliding phase is attributed to a mechanism of cross-dimensional energy transfer in our proposed phenomenological theory, which is consistent with experimental measurements. This experiment potentially opens up a novel venue to search for exotic dynamical phases by creating high-band excitations in optical lattices.Sliding phases have been long sought after in the context of coupled XY models, as they are of relevance to various many-body systems such as layered superconductors, freestanding liquid-crystal films, and cationic lipid-DNA complexes. Here we report an observation of a dynamical sliding phase superfluid that emerges in a nonequilibrium setting from the quantum dynamics of a three-dimensional ultracold atomic gas loaded into the P band of a one-dimensional optical lattice. A shortcut loading method is used to transfer atoms into the P band at zero quasimomentum within a very short time duration. The system can be viewed as a series of "pancake"-shaped atomic samples. For this far-out-of-equilibrium system, we find an intermediate time window with a lifetime around tens of milliseconds, where the atomic ensemble exhibits robust superfluid phase coherence in the pancake directions, but no coherence in the lattice direction, which implies a dynamical sliding phase superfluid. The emergence of the sliding phase is attributed to a mechanism of cross-dimensional energy transfer in our proposed phenomenological theory, which is consistent with experimental measurements. This experiment potentially opens up a novel venue to search for exotic dynamical phases by creating high-band excitations in optical lattices.

arXiv:1805.03073Physical Review LettersDec 28, 201839 citations

Sliding phases via magnetic fields

Shivaji L. Sondhi, Kun Yang

We show that three-dimensional ``sliding'' analogs of the Kosterlitz-Thouless phase, in stacked classical two-dimensional $\mathrm{XY}$ models and quantum systems of coupled Luttinger liquids, can be enlarged by the application of a parallel magnetic field, which has the effect of increasing the scaling dimensions of the most relevant operators that can perturb the critical sliding phases. Within our renormalization-group analysis, we also find that for the case of coupled Luttinger liquids, this effect is interleaved with the onset of the integer quantum Hall effect for weak interactions and fields. We comment on experimental implications for a conjectured smectic metal phase in the cuprates.We show that three-dimensional ``sliding'' analogs of the Kosterlitz-Thouless phase, in stacked classical two-dimensional $\mathrm{XY}$ models and quantum systems of coupled Luttinger liquids, can be enlarged by the application of a parallel magnetic field, which has the effect of increasing the scaling dimensions of the most relevant operators that can perturb the critical sliding phases. Within our renormalization-group analysis, we also find that for the case of coupled Luttinger liquids, this effect is interleaved with the onset of the integer quantum Hall effect for weak interactions and fields. We comment on experimental implications for a conjectured smectic metal phase in the cuprates.

arXiv:cond-mat/0007349Physical review. B, Condensed matterJan 11, 200183 citations

Torsion and entropy driven denaturation of DNA

Subhamoy Singha Roy, Pratul Bandyopadhyay

Physics Letters ASep 5, 20138 citations

We show that three-dimensional ``sliding'' analogs of the Kosterlitz-Thouless phase, in stacked classical two-dimensional

\mathrm{XY}

models and quantum systems of coupled Luttinger liquids, can be enlarged by the application of a parallel magnetic field, which has the effect of increasing the scaling dimensions of the most relevant operators that can perturb the critical sliding phases. Within our renormalization-group analysis, we also find that for the case of coupled Luttinger liquids, this effect is interleaved with the onset of the integer quantum Hall effect for weak interactions and fields. We comment on experimental implications for a conjectured smectic metal phase in the cuprates.