Deterministic generation and tomography of a macroscopic Bell state between a millimeter-sized spin system and a superconducting qubit

  1. Da Xu,
  2. Xu-Ke Gu,
  3. Yuan-Chao Weng,
  4. He-Kang Li,
  5. Yi-Pu Wang,
  6. Shi-Yao Zhu,
  7. and J. Q. You
Entanglement is a fundamental property in quantum mechanics that systems share inseparable quantum correlation regardless of their mutual distances. Owing to the fundamental significance

Pokemon: Protected Logic Qubit Derived from the 0-π Qubit

  1. J. Q. You,
  2. and Franco Nori
We propose a new protected logic qubit called pokemon, which is derived from the 0-π qubit by harnessing one capacitively shunted inductor and two capacitively shunted Josephson junctions

Photon-Dressed Bloch-Siegert Shift in an Ultrastrongly Coupled Circuit Quantum Electrodynamical System

  1. Shuai-Peng Wang,
  2. Guo-Qiang Zhang,
  3. Yimin Wang,
  4. Zhen Chen,
  5. Tiefu Li,
  6. J. S. Tsai,
  7. Shi-Yao Zhu,
  8. and J. Q. You
A cavity quantum electrodynamical (QED) system beyond the strong-coupling regime is expected to exhibit intriguing quantum phenomena. Here we report a direct measurement of the photon-dressed

Controllable anisotropic quantum Rabi model beyond the ultrastrong coupling regime with circuit QED systems

  1. Yimin Wang,
  2. Wen-Long You,
  3. Maoxin Liu,
  4. Yu-Li Dong,
  5. Hong-Gang Luo,
  6. G. Romero,
  7. and J. Q. You
By manipulating the flux qubits with bichromatic time-dependent magnetic fluxes in standard circuit QED systems, we propose an experimentally-accessible method to approach the physics

Nonadiabatic Holonomic Quantum Computation with Dressed-state Qubits

  1. Zheng-Yuan Xue,
  2. Feng-Lei Gu,
  3. Zhuo-Ping Hong,
  4. Zi-He Yang,
  5. Dan-Wei Zhang,
  6. Yong Hu,
  7. and J. Q. You
Implementing holonomic quantum computation is a challenging task as it requires complicated interaction among multilevel systems. Here, we propose to implement nonadiabatic holonomic

Method for identifying electromagnetically induced transparency in a tunable circuit quantum electrodynamics system

  1. Qi-Chun Liu,
  2. Tie-Fu Li,
  3. Xiao-Qing Luo,
  4. Hu Zhao,
  5. Wei Xiong,
  6. Ying-Shan Zhang,
  7. Zhen Chen,
  8. J. S. Liu,
  9. Wei Chen,
  10. Franco Nori,
  11. J. S. Tsai,
  12. and J. Q. You
Electromagnetically induced transparency (EIT) has been realized in atomic systems, but fulfilling the EIT conditions for artificial atoms made from superconducting circuits is a more

Holonomic quantum computation in the ultrastrong-coupling regime of circuit QED

  1. Yimin Wang,
  2. Jiang Zhang,
  3. Chunfeng Wu,
  4. J. Q. You,
  5. and G. Romero
We present an experimentally feasible scheme to implement holonomic quantum computation in the ultrastrong-coupling regime of light-matter interaction. The large anharmonicity and the

Multi-photon sideband transitions in an ultrastrongly-coupled circuit quantum electrodynamics system

  1. Zhen Chen,
  2. Yimin Wang,
  3. Tiefu Li,
  4. Lin Tian,
  5. Yueyin Qiu,
  6. Kunihiro Inomata,
  7. Fumiki Yoshihara,
  8. Siyuan Han,
  9. Franco Nori,
  10. J. S. Tsai,
  11. and J. Q. You
Ultrastrong coupling in circuit quantum electrodynamics systems not only provides a platform to study the quantum Rabi model, but it can also facilitate the implementation of quantum

Four-junction superconducting circuit in both flux and phase regimes

  1. Yueyin Qiu,
  2. Wei Xiong,
  3. Xiao-Ling He,
  4. Tie-Fu Li,
  5. and J. Q. You
We develop a theory for the quantum circuit consisting of a superconducting loop interrupted by four Josephson junctions and pierced by a magnetic flux (either static or time-dependent).

Controllable coupling between a nanomechanical resonator and a coplanar-waveguide resonator via a superconducting flux qubit

  1. Wei Xiong,
  2. Da-Yu Jin,
  3. Jun Jing,
  4. Chi-Hang Lam,
  5. and J. Q. You
We study a tripartite quantum system consisting of a coplanar-waveguide (CPW) resonator and a nanomechanical resonator (NAMR) connected by a flux qubit, where the flux qubit has a large