Speaker
Description
Discrete time crystals created in a Bose-Einstein condensate of ultracold atoms bouncing on an oscillating mirror [1] can exhibit dramatic breaking of time-translation symmetry [2, 3], allowing the creation of discrete time crystals having tens of temporal lattice sites and suitable for hosting a broad range of condensed matter phenomena in the time dimension [4].
We will discuss temporal condensed matter phenomena including Anderson and many-body localisation due to temporal disorder, topological time crystals and quasi-crystalline structures in time. We will also discuss the construction of two-dimensional time lattices involving a BEC bouncing between two oscillating mirrors oriented at 90-degrees and at 45-degrees. The latter configuration can support a versatile Möbius strip geometry which can host a variety of two-dimensional time lattices including a honeycomb time lattice and a Lieb square time lattice [5].
References:
[1] K. Sacha, Phys. Rev. A 91, 033617 (2015).
[2] K. Giergiel, A. Kosior and P. Hannaford, Phys. Rev. A 98, 013613 (2018).
[3] K. Giergiel, T. Tran, A. Zaheer, A. Singh, A. Sidorov, K. Sacha and P. Hannaford, New J. Phys. 22,
085004 (2020).
[4] P. Hannaford and K. Sacha, AAPPS Bulletin 32, 12 (2022).
[5] K. Giergiel, A. Kuros, A. Kosior, and K. Sacha, Phys. Rev. Lett. 127, 263003 (2021).
