Emergence and control of complex behaviors in driven systems of interacting qubits with dissipation

Andreev, A. V.; Balanov, A. G.; Fromhold, T. M.; Greenaway, M. T.; Hramov, A. E.; Li, W.; Makarov, V. V.; Zagoskin, A. M.

doi:10.1038/s41534-020-00339-1

BCS-BEC crossover of ultracold ions driven by density-dependent short-range interactions in a quantum plasma (2021)
Journal Article
Zhang, Y., Wang, Y., Jiang, W., & Li, W. (2021). BCS-BEC crossover of ultracold ions driven by density-dependent short-range interactions in a quantum plasma. Physical Review A, 104(6), Article 063312. https://doi.org/10.1103/physreva.104.063312

We study theoretically a Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensate (BEC) crossover of two-species ions in a three-dimensional quantum plasma at zero temperature. Central to this crossover is an effective short-ranged, attractive int... Read More about BCS-BEC crossover of ultracold ions driven by density-dependent short-range interactions in a quantum plasma.

Systematic-Error-Tolerant Multiqubit Holonomic Entangling Gates (2021)
Journal Article
Wu, J., Wang, Y., Han, J., Jiang, Y., Song, J., Xia, Y., …Li, W. (2021). Systematic-Error-Tolerant Multiqubit Holonomic Entangling Gates. Physical Review Applied, 16(6), Article 064031. https://doi.org/10.1103/PhysRevApplied.16.064031

Quantum holonomic gates hold built-in resilience to local noises and provide a promising approach for implementing fault-tolerant quantum computation. We propose to realize high-fidelity holonomic (N + 1)-qubit controlled gates using Rydberg atoms co... Read More about Systematic-Error-Tolerant Multiqubit Holonomic Entangling Gates.

Hyperchaos in a bose-hubbard chain with rydberg-dressed interactions (2021)
Journal Article
McCormack, G., Nath, R., & Li, W. (2021). Hyperchaos in a bose-hubbard chain with rydberg-dressed interactions. Photonics, 8(12), Article 554. https://doi.org/10.3390/photonics8120554

We study the chaos and hyperchaos of Rydberg-dressed Bose–Einstein condensates (BECs) in a one-dimensional optical lattice. Due to the long-range, soft-core interaction between the dressed atoms, the dynamics of the BECs are described by the extended... Read More about Hyperchaos in a bose-hubbard chain with rydberg-dressed interactions.

Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions (2021)
Journal Article
Zhou, Y., Nath, R., Wu, H., Lesanovsky, I., & Li, W. (2021). Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions. Physical Review A, 104(6), Article L061302. https://doi.org/10.1103/physreva.104.l061302

We study theoretically the deformation of the Fermi surface (FS) of a three-dimensional gas of Rydberg-dressed 6Li atoms. The laser dressing to high-lying Rydberg D states results in angle-dependent soft-core-shaped interactions whose anisotropy is d... Read More about Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions.

Dipole-dipole-interaction-driven antiblockade of two Rydberg atoms (2021)
Journal Article
Su, S. L., & Li, W. (2021). Dipole-dipole-interaction-driven antiblockade of two Rydberg atoms. Physical Review A, 104(3), Article 033716. https://doi.org/10.1103/PhysRevA.104.033716

Resonant laser excitation of multiple Rydberg atoms are prohibited, leading to Rydberg blockade, when the long-range van der Waals interactions are stronger than the laser-atom coupling. Rydberg blockade can be violated, i.e., simultaneous excitation... Read More about Dipole-dipole-interaction-driven antiblockade of two Rydberg atoms.

Observation of blackbody radiation enhanced superradiance in ultracold Rydberg gases (2021)
Journal Article
Hao, L., Bai, Z., Bai, J., Bai, S., Jiao, Y., Huang, G., …Jia, S. (2021). Observation of blackbody radiation enhanced superradiance in ultracold Rydberg gases. New Journal of Physics, 23(8), Article 083017. https://doi.org/10.1088/1367-2630/ac136c

An ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance when its characteristic size is smaller than the wavelength of emitted photons. The underlying superradiance depends strongly on electroma... Read More about Observation of blackbody radiation enhanced superradiance in ultracold Rydberg gases.

Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions (2021)
Journal Article
Gambetta, F. M., Zhang, C., Hennrich, M., Lesanovsky, I., & Li, W. (2021). Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions. Physical Review Letters, 126(23), Article 233404. https://doi.org/10.1103/physrevlett.126.233404

Conical intersections between electronic potential energy surfaces are paradigmatic for the study of nonadiabatic processes in the excited states of large molecules. However, since the corresponding dynamics occurs on a femtosecond timescale, their i... Read More about Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions.

Adiabatic sensing technique for optimal temperature estimation using trapped ions (2021)
Journal Article
Kirkova, A. V., Li, W., & Ivanov, P. A. (2021). Adiabatic sensing technique for optimal temperature estimation using trapped ions. Physical Review Research, 3, Article 013244. https://doi.org/10.1103/physrevresearch.3.013244

We propose an adiabatic method for optimal phonon temperature estimation using trapped ions which can be operated beyond the Lamb-Dicke regime. The quantum sensing technique relies on a time-dependent red-sideband transition of phonon modes, describe... Read More about Adiabatic sensing technique for optimal temperature estimation using trapped ions.

Population trapping in a pair of periodically driven Rydberg atoms (2021)
Journal Article
Mallavarapu, S. K., Niranjan, A., Li, W., Wüster, S., & Nath, R. (2021). Population trapping in a pair of periodically driven Rydberg atoms. Physical Review A, 103(2), Article 023335. https://doi.org/10.1103/physreva.103.023335

We study the population trapping extensively in a periodically driven Rydberg pair. The periodic modulation of the atom-light detuning effectively suppresses the Rabi couplings and, together with Rydberg-Rydberg interactions, leads to the state-depen... Read More about Population trapping in a pair of periodically driven Rydberg atoms.

Emergence and control of complex behaviors in driven systems of interacting qubits with dissipation (2021)
Journal Article
Andreev, A. V., Balanov, A. G., Fromhold, T. M., Greenaway, M. T., Hramov, A. E., Li, W., …Zagoskin, A. M. (2021). Emergence and control of complex behaviors in driven systems of interacting qubits with dissipation. npj Quantum Information, 7(1), Article 1. https://doi.org/10.1038/s41534-020-00339-1

Progress in the creation of large scale, artificial quantum coherent structures demands the investigation of their nonequilibrium dynamics when strong interactions, even between remote parts, are non-perturbative. Analysis of multiparticle quantum co... Read More about Emergence and control of complex behaviors in driven systems of interacting qubits with dissipation.

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