Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Liquid Time Crystals   We have constructed and characterised an instrument to study gravitationally
bouncing droplets of fluid, subjected to periodic driving force. Our system
incorporates a droplet printer that enables an on-demand computer controlled
deposition of droplets on the fluid surface. We demonstrate the operation of
this instrument by creating and observing long-lived and interacting time
crystals whose evolution we have witnessed for more than one hundred thousand
oscillation periods. Our observations provide points of comparison for
experiments that differentiate between quantum and classical time crystal
behaviours in driven non-equilibrium systems.

32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat