Article
Optics
Chi-En Wu, Teodora Kirova, Marcis Auzins, Yi-Hsin Chen
Summary: In this theoretical study, the enhancement of the Rydberg blockade radius using Forster resonance is presented. The investigation reveals that significant differences in the principal quantum numbers of two Rydberg states can substantially improve the blockade radius, exceeding 50 μm.
Article
Physics, Multidisciplinary
Yuechun Jiao, Jingxu Bai, Rong Song, Shanxia Bao, Jianming Zhao, Suotang Jia
Summary: In this study, we demonstrated a tuned dipole interaction between Rydberg atoms by employing a controllable electric field in a cold cesium ensemble. By precisely tuning the electric field, Forster resonant interaction and adiabatic resonance energy transfer between the nP and nS Rydberg states were achieved. The results showed that the dipole interaction-induced blockade effect is stronger than the van der Waals interaction-induced blockade effect.
FRONTIERS IN PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Rong Song, Jingxu Bai, Yuechun Jiao, Jianming Zhao, Suotang Jia
Summary: This study accurately measured and analyzed the lifetimes of nS(1/2) and nD(5/2) cesium Rydberg states. The results showed that the room temperature blackbody radiation and interaction between Rydberg atoms have an impact on the lifetime, especially at higher Rydberg atomic densities.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Jin-Lei Wu, Yan Wang, Jin-Xuan Han, Shi-Lei Su, Yan Xia, Yongyuan Jiang, Jie Song
Summary: A dynamics regime of Rydberg atoms called unselective ground-state blockade (UGSB) is proposed to implement a one-step SWAP gate without individual addressing of atoms in the context of Rydberg antiblockade (RAB). This work modifies the RAB condition to achieve a dynamical and robust SWAP gate, and further investigates the implementation of a three-atom Fredkin gate based on the proposed SWAP gates.
FRONTIERS OF PHYSICS
(2022)
Article
Optics
Jingxu Bai, Yuechun Jiao, Yunhui He, Rong Song, Jianming Zhao, Suotang Jia
Summary: This study demonstrates the three-photon Autler-Townes (AT) spectroscopy in a cold cesium Rydberg four-level atom and investigates the positions of AT peaks and AT splittings, as well as their dependence on the characteristics of the coupling lasers. The research finds that AT splitting γ(AB) mainly comes from the first photon coupling, while γ(BC) mainly comes from the second photon coupling. The simulated results show good agreement with the theoretical simulations considering spectral line broadening.
Article
Optics
Minghao Cai, Zishan Xu, Shuhang You, Hongping Liu
Summary: This study presents a theoretical and experimental investigation on the improvement and determination of the sensitivity of Rydberg atom-based microwave RF sensor. By setting up an optical Bloch equation, it is found that the sensitivity of the sensor is correlated with the amplitude strengths of the applied lasers and the RF, as well as the frequency detuning of the coupling laser. Experimental demonstration shows that optimizing these parameters can improve the sensitivity to 12.50(04) nVcm(-1).Hz(-1/)(2).
Article
Optics
Yijiao Fu, Jinhui Wu
Summary: Rydberg anti-blockade allows multiple atoms to be simultaneously excited in the presence of nonlocal interactions. By adjusting the detuning of a pump field, resonant excitations of N atoms can be achieved while suppressing excitations of fewer atoms. Population dynamics show that one-step anti-blockade implementation can be achieved at a cutoff time of the pump field.
Article
Optics
Matthew A. Norcia
Summary: This new method autonomously assembles atoms in optical tweezers or lattice sites by utilizing tunneling and ground-state laser cooling, avoiding the limitations of imaging and evaporative cooling in traditional methods. The substantial speed improvement makes it particularly suitable for preparing arbitrary initial conditions for Bose-Hubbard or Rydberg interacting systems.
Article
Physics, Multidisciplinary
Kavish Bhardwaj, S. P. Ram, S. Singh, V. B. Tiwari, S. R. Mishra
Summary: This work investigates the effect of AC-Stark shift of atomic energy levels in an optical dipole trap on in situ absorption imaging of trapped atoms. The estimated number of atoms trapped in the ODT is found to be higher at higher ODT beam power, showing qualitative agreement with larger trap depth at higher beam power. This research can be particularly useful in estimating the in situ loss rate of atoms from the trap during evaporative cooling of the trapped atom cloud.
Article
Physics, Applied
Alisher Duspayev, Georg Raithel
Summary: In this study, we analyze the electric fields in ion sources generated by the quasicontinuous photoionization of cold Rb atoms trapped in a near-concentric, in-vacuum cavity for 1064-nm laser light. The Stark effects of Rb 57F and nearby high-angular-momentum Rydberg levels are utilized to study the net electric-field probability distribution within the ion-source region. The experimental spectra are compared with theoretical spectra, and the results are in good agreement.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Vitaly D. Ovsiannikov, Vitaly G. Palchikov, Igor L. Glukhov
Summary: The high-precision determination of microwave radiation parameters can be achieved by measuring the spectral characteristics of radiation transitions between the Rydberg states of atoms. In this study, frequencies and matrix elements of dipole transitions between different Rydberg states of alkali-metal atoms were calculated using numerical computations. The calculated data were approximated to accurately evaluate the frequencies and matrix elements of microwave transitions.
Article
Quantum Science & Technology
Lorenzo Cardarelli, Sergi Julia-Farre, Maciej Lewenstein, Alexandre Dauphin, Markus Mueller
Summary: This work investigates a realistic scenario for the quantum simulation of interaction-induced topological phases using cold Rydberg-dressed atoms in optical lattices. The phase diagram of spinless fermions on a checkerboard lattice is analyzed in the mean-field approximation, and the stability of the phases with respect to temperature and quantum fluctuations is studied. An implementation protocol is proposed to access the topological properties of the model in state-of-the-art cold atom quantum simulators.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Review
Physics, Multidisciplinary
Bai Su-Ying, Bai Jing-Xu, Han Xiao-Xuan, Jiao Yue-Chun, Zhao Jian-Ming
Summary: This paper reviews the recent theoretical and experimental investigations of ultra-cold long-range Rydberg-ground molecules, highlighting their unique properties, formation mechanisms, and potential applications in strongly correlated many-body gases, quantum information processing, and systems with long-distance interactions. Recent research reveals negative permanent electric dipole moments in Cs nD(J)-type Rydberg-ground molecules, signaling a deficiency in Rydberg-electron density near ground-state perturbers caused by electronic configuration mixing.
ACTA PHYSICA SINICA
(2021)
Article
Optics
Ting Jin, Shaohua Li, Jinpeng Yuan, Lirong Wang, Liantuan Xiao, Suotang Jia
Summary: In this study, coherent population transfer of Rydberg atoms in Rb-85 is achieved using a dual-microwave driven four-step excitation scheme, with observations of electromagnetically induced transparency, Autler-Townes splitting, and CPT with different energy level configurations. The effects of power and frequency detuning of microwave fields are explored to demonstrate diverse population dynamics. A theoretical model based on the density-matrix is proposed and numerically solved to understand the entire coherent mechanism. Compared to mono-microwave processes, the dual-microwave approach offers optimal coherent transfer evolution with multiple tunable parameters.
OPTICS COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Jin Zhao, Li Rui, Gong Wei-Jiang, Qi Yang, Zhang Shou, Su Shi-Lei
Summary: This study investigates the implementation of controlled-phase gate and swap gate in one step based on the constructed Rydberg antiblockade (RAB) and double antiblockade (RDAB) regimes when the interatomic distance is less than the characteristic length. The strategy compensates the energy shift induced by weak Rydberg-Rydberg interaction (RRI) by properly tuning the detuning between the driving field and atomic transition frequencies, leading to high fidelity gate operations.
ACTA PHYSICA SINICA
(2021)
Article
Physics, Multidisciplinary
E. A. Yakshina, D. B. Tretyakov, V. M. Entin, I. I. Beterov, I. I. Ryabtsev
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2020)
Review
Optics
I. I. Beterov, D. B. Tretyakov, V. M. Entin, E. A. Yakshina, I. I. Ryabtsev, M. Saffman, S. Bergamini
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2020)
Article
Engineering, Electrical & Electronic
P. Cheinet, K. -L. Pham, P. Pillet, I. I. Beterov, I. N. Ashkarin, D. B. Tretyakov, E. A. Yakshina, V. M. Entin, I. I. Ryabtsev
QUANTUM ELECTRONICS
(2020)
Article
Engineering, Electrical & Electronic
I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, U. Singh, Ya. V. Kudlaev, K. Yu. Mityanin, K. A. Panov, N. V. Al'yanova, I. I. Ryabtsev
QUANTUM ELECTRONICS
(2020)
Article
Optics
Alaa Abo Zalam, M. Bruvelis, K. Miculis, I. I. Beterov, N. N. Bezuglov, A. Ekers, F. Fuso
Summary: Studies have shown that specific quantum number combinations in Penning ionisation processes between alkali-metal atoms in certain excited states can significantly increase ionisation rates, making it crucial for the production of cold plasma.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, N. Al'yanova, K. Yu Mityanin, I. I. Ryabtsev
Summary: Experiments successfully demonstrated the implementation of single-qubit quantum gates with a single Rb-87 atom in an optical dipole trap, achieving operations including Hadamard gate and NOT gate with an average fidelity of 95.2%. The observation of Rabi oscillations during the clock microwave transition played a key role in these achievements.
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, N. Al'yanova, K. Yu Mityanin, A. M. Faruk, I. I. Ryabtsev
Summary: This experiment successfully implemented individually addressable one-qubit quantum gates on two Rb-87 atoms. Rabi oscillations with high frequency, contrast, and coherence time were obtained without addressing. Addressing effectively suppressed the probability of microwave transitions in the addressed atom.
QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
N. A. Zhuravlev, I. I. Beterov
Summary: The elementary algorithm of quantum phase estimation based on the modified Kitaev algorithm is implemented on two qubits of an IBM quantum processor, involving adiabatic preparation of the initial state, controlled phase shift, and single measurement of the qubit quantum state. Classical error correction is used to determine the correct sequence of bits and eliminate the influence of limited accuracy of two-qubit gates.
QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
D. B. Tretyakov, V. M. Entin, E. A. Yakshina, I. I. Beterov, I. I. Ryabtsev
Summary: The temporal dynamics of the excitation process from 5S(1/2) to 39P(3/2) Rydberg states in cold atoms were studied. The experimental results are important for the application of Rydberg atoms in quantum information.
QUANTUM ELECTRONICS
(2022)
Article
Optics
I. N. Ashkarin, I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, I. I. Ryabtsev, P. Cheinet, K. -L. Pham, S. Lepoutre, P. Pillet
Summary: We have developed an improved scheme of a three-qubit Toffoli gate based on a fine-structure-state-changing three-body Stark-tuned Rydberg interaction. The scheme simplifies the laser excitation and phase dynamics of collective three-body states by using a different type of three-body Forster resonance. Compared to the previous scheme, this new scheme reduces the sensitivity of the gate fidelity to fluctuations of external electric field and eliminates the need for fine-tuning with an external magnetic field. The calculations demonstrated a gate fidelity of > 99%.
Proceedings Paper
Engineering, Electrical & Electronic
I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, U. Singh, Ya Kudlaev, K. Yu Mityanin, K. A. Panov, N. Alyanova, C. Andreeva, I. I. Ryabtsev
Summary: The study demonstrates successful trapping and detection of single rubidium-87 atoms using a low-cost camera, as well as implementing a single qubit gate with a fidelity near 95%. Conducting experiments outside the vacuum chamber with appropriate objective lenses and cameras is feasible.
XXI INTERNATIONAL CONFERENCE AND SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS
(2021)
Article
Physics, Multidisciplinary
I. I. Ryabtsev, K. Yu Mityanin, I. I. Beterov, D. B. Tretyakov, V. M. Entin, E. A. Yakshina, N. Al'yanova, I. G. Neizvestnii
OPTOELECTRONICS INSTRUMENTATION AND DATA PROCESSING
(2020)
Article
Physics, Multidisciplinary
I. I. Beterov
OPTOELECTRONICS INSTRUMENTATION AND DATA PROCESSING
(2020)
Article
Optics
M. Saffman, I. I. Beterov, A. Dalal, E. J. Paez, B. C. Sanders
