Smooth time-dependent control of dipolar Bose-Einstein condensates
- URL: http://arxiv.org/abs/2606.20507v1
- Date: Thu, 18 Jun 2026 17:25:26 GMT
- Title: Smooth time-dependent control of dipolar Bose-Einstein condensates
- Abstract summary: We consider protocols for control of dipolar Bose-Einstein condensates where the critical role is played by the long-range anisotropic interatomic magnetic dipole-dipole interaction.<n>The phase diagram of such a condensate has been explored theoretically and experimentally with certain values of the interatomic scattering length corresponding to superfluid and supersolid phases.
- Score: 2.4628451195554986
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We consider protocols for control of dipolar Bose-Einstein condensates where the critical role is played by the long-range anisotropic interatomic magnetic dipole-dipole interaction. The phase diagram of such a condensate has been explored theoretically and experimentally with certain values of the interatomic scattering length corresponding to superfluid and supersolid phases, where supersolidity appears as a modulation in the ground state density. Preparation of this modulated ground state is challenging, since excitations appear as a result of a finite-time evolution required to produce qualitative changes in the wavefunction density. To solve this problem we consider the time-dependent control of a dipolar Bose-Einstein condensate using shortcuts to adiabaticity techniques, concentrating on design of the time-dependent scattering length, a parameter of the system easily tunable by contemporary experiments. The first technique is the variational approach based on the Euler-Lagrange equations for a separable ansatz describing the evolution of the superfluid state. Secondly, we study the transition from superfluid to supersolid using a direct optimization protocol. We discuss the fidelity of the developed protocols in terms of the evolution time.
Related papers
- Adiabatic preparation of a fractional quantum Hall fluid by coherently pumping atoms from a Bose-Einstein condensate [36.94429692322632]
We propose a protocol to adiabatically prepare a many-particle fractional quantum Hall fluid of bosonic ultracold atoms.<n>Starting from an empty cloud, atoms with well-defined angular momentum are coherently pumped into the fluid by Raman beams.<n>Compared to number-conserving schemes which rely on finite-size-induced topological gaps, we identify an adiabatic path in the Fock space.
arXiv Detail & Related papers (2026-06-14T18:19:31Z) - Counterdiabatic Driving for Periodically Driven Systems [0.0]
Periodically driven systems have emerged as a useful technique to engineer the properties of quantum systems.
We develop a technique to capture nonperturbative photon resonances and obtain high-fidelity protocols.
arXiv Detail & Related papers (2023-10-04T11:08:19Z) - Quantum Gate Generation in Two-Level Open Quantum Systems by Coherent
and Incoherent Photons Found with Gradient Search [77.34726150561087]
We consider an environment formed by incoherent photons as a resource for controlling open quantum systems via an incoherent control.
We exploit a coherent control in the Hamiltonian and an incoherent control in the dissipator which induces the time-dependent decoherence rates.
arXiv Detail & Related papers (2023-02-28T07:36:02Z) - Bohmian analysis of dark solutions in interfering Bose-Einstein condensates: The dynamical role of underlying velocity fields [0.0]
Bohmian mechanics is considered as an additional tool to explore and analyze the formation and evolution in real time of the soliton arrays.
To better appreciate the subtleties of free versus bound dynamics, two cases are discussed.
arXiv Detail & Related papers (2022-10-24T12:45:34Z) - Ground state bistability of cold atoms in a cavity [0.0]
We experimentally demonstrate an optical bistability between two hyperfine atomic ground states, using a single mode of an optical resonator in the collective strong coupling regime.
Whereas in the familiar case, the bistable region is created through atomic saturation, we report an effect between states of high quantum purity, which is essential for future information storage.
arXiv Detail & Related papers (2022-07-04T21:13:14Z) - Clean two-dimensional Floquet time-crystal [68.8204255655161]
We consider the two-dimensional quantum Ising model, in absence of disorder, subject to periodic imperfect global spin flips.
We show by a combination of exact diagonalization and tensor-network methods that the system can sustain a spontaneously broken discrete time-translation symmetry.
We observe a non-perturbative change in the decay rate of the order parameter, which is related to the long-lived stability of the magnetic domains in 2D.
arXiv Detail & Related papers (2022-05-10T13:04:43Z) - On optimization of coherent and incoherent controls for two-level
quantum systems [77.34726150561087]
This article considers some control problems for closed and open two-level quantum systems.
The closed system's dynamics is governed by the Schr"odinger equation with coherent control.
The open system's dynamics is governed by the Gorini-Kossakowski-Sudarshan-Lindblad master equation.
arXiv Detail & Related papers (2022-05-05T09:08:03Z) - Quantum Cherenkov transition of finite momentum Bose polarons [0.0]
We investigate the behavior of a finite-momentum impurity immersed in a weakly interacting Bose-Einstein condensate (BEC) of ultra-cold atoms.<n>We identify a transition in the far-from-equilibrium dynamics of the system after the attractive short-range impurity-boson interaction is quenched on.<n>The transition should be experimentally observable via a variety of common protocols in ultracold atomic systems.
arXiv Detail & Related papers (2021-09-25T02:02:32Z) - Observation of Time-Crystalline Eigenstate Order on a Quantum Processor [80.17270167652622]
Quantum-body systems display rich phase structure in their low-temperature equilibrium states.
We experimentally observe an eigenstate-ordered DTC on superconducting qubits.
Results establish a scalable approach to study non-equilibrium phases of matter on current quantum processors.
arXiv Detail & Related papers (2021-07-28T18:00:03Z) - Onset and Irreversibility of Granulation of Bose-Einstein condensates
under Feshbach Resonance Management [0.0]
Granulation of quantum matter -- the formation of persistent small-scale patterns -- is realized in the images of Bose-Einstein condensates.
Our present analysis of a mean-field approximation suggests that granulation is caused by the gradual transformation of phase undulations into density undulations.
arXiv Detail & Related papers (2021-03-12T19:00:02Z) - Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas.
Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit.
The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
arXiv Detail & Related papers (2020-08-05T18:00:26Z) - Probing eigenstate thermalization in quantum simulators via
fluctuation-dissipation relations [77.34726150561087]
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems.
Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations.
Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
arXiv Detail & Related papers (2020-07-20T18:00:02Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.