Tunable electromagnetically induced transparency and absorption with dressed superconducting qubits

Abstract

Electromagnetically induced transparency and absorption (EIT and EIA) are usually demonstrated using three-level atomic systems. In contrast to the usual case, we theoretically study the EIT and EIA in an equivalent three-level system: a superconducting two-level system (qubit) dressed by a single-mode cavity field. In this equivalent system, we find that both the EIT and the EIA can be tuned by controlling the level-spacing of the superconducting qubit and hence controlling the dressed system. This tunability is due to the dressed relaxation and dephasing rates which vary parametrically with the level-spacing of the original qubit and thus affect the transition properties of the dressed qubit and the susceptibility. These dressed relaxation and dephasing rates characterize the reaction of the dressed qubit to an incident probe field. Using recent experimental data on superconducting qubits (charge, phase, and flux qubits) to demonstrate our approach, we show the possibility of experimentally realizing this proposal.

Phase-dependent optical response properties in an optomechanical system by coherently driving the mechanical resonator

“…OMIT in the nonlinear quantum regime has also been investigated [17][18][19][20]. On the other hand, optomechanically induced absorption (OMIA) phenomenon, which is an analog of electromagnetically induced absorption (EIA) investigated in atomic gas [21,22] and superconducting artificial atoms [23], can also be realized in optomechanical setup [13,24,25]. And OMIA is a phenomenon closely related to optomechanically induced amplification [13,14,[26][27][28].…”

Amplitude spectroscopy of two coupled qubits

“…(19) and/or Eq. (20) can be fulfilled with the participation of second and third intermediate levels, respectively. A characteristic feature of this transition is the absence of peaks at integer values of the control parameter of the qubits, and the lack of resonance shifts when the coupling constant J is changed.…”

“…For a driven two-level system, drastic effects on the tunneling rate arise from quasi-energy crossing and anticrossing 15,16 . At certain amplitudes of the driving field, dynamical localization and trapping of the system into a non-linear resonance can take place [17][18][19][20][21][22][23][24][25] . As the parameters are changed when the level-approaching and level-crossing take place, the effects of band-to-band tunneling (Landau-Zener transitions) can occur.…”

Steady-state solution for dark states using a three-level system in coupled quantum dots

“…CPT is a typical phenomena of quantum coherence in three-level system and has been intensively studied in optics [12][13][14][15][16] . By adjusting two laser fields, the electron population between the lowest two energylevels are coherently transferred.…”