We propose and describe our realization of a deeply subwavelength optical lattice for ultracold neutral atoms using N resonantly Raman-coupled internal degrees of freedom. Although counterpropagating lasers with wavelength λ provided two-photon Raman coupling, the resultant lattice period was λ/2N, an N-fold reduction as compared to …
Realization of a deeply subwavelength adiabatic optical lattice Read more »
On this day, Dec. 2, 2019, Ana Valdés-Curiel has become Dr. ! Congratulations Ana.
We describe a technique to emulate the dynamics of two-level PT-symmetric spin Hamiltonians, replete with gain and loss, using the unitary dynamics of a larger quantum system. The two-level system in question is embedded in a subspace of a four-level …
Perpetual emulation threshold of PT-symmetric Hamiltonians Read more »
UMD Senior Eliot Fenton (LEFT FRONT) was been selected for recognition as one of Maryland¹s ‘Undergraduate Researchers of the Year’ for 2018. So cool! After the awards ceremony we all went to town hall to celebrate! Eliot will be moving …
Eliot Fenton: a UMD Undergraduate Researchers of the Year for 2018 Read more »
After a very productive two month visit to the RbL lab at JQI, Russell Anderson of Monash University has returned home. Thanks for a great time Russ!
We describe a Fourier transform spectroscopy technique for directly measuring band structures, and apply it to a spin-1 spin–orbit coupled Bose–Einstein condensate. In our technique, we suddenly change the Hamiltonian of the system by adding a spin–orbit coupling interaction and …
Fourier transform spectroscopy of a spin–orbit coupled Bose gas Read more »
We observed a new mechanism for vortex nucleation in Bose–Einstein condensates (BECs) subject to synthetic magnetic fields. We made use of a strong synthetic magnetic field initially localized between a pair of merging BECs to rapidly create vortices in the …
Vortex nucleation in a Bose–Einstein condensate: from the inside out Read more »
The UMD team got together to celebrate our recent paper “Magnetic phases of spin-1 spin–orbit-coupled Bose gases;” for some reason we went to Town Hall a long-time College Park dive bar. Times were good! Ana, Erin and Dimi were in …
Celebration of: Magnetic phases of spin-1 spin–orbit-coupled Bose gases Read more »
We theoretically explore a Rashba spin–orbit coupling scheme which operates entirely in the absolute ground state manifold of an alkali atom, thereby minimizing all inelastic processes. An energy gap between ground eigenstates of the proposed coupling can be continuously opened …
Phases of matter are characterized by order parameters describing the type and degree of order in a system. Here we experimentally explore the magnetic phases present in a near-zero temperature spin-1 spin–orbit-coupled atomic Bose gas and the quantum phase transitions …
Magnetic phases of spin-1 spin–orbit-coupled Bose gases Read more »