Demonstration of dynamical control of three-level open systems with a superconducting qutrit

Abstract

We propose a method for the dynamical control in three-level open systems and realize it in the experiment with a superconducting qutrit. Our work demonstrates that in the Markovian environment for a relatively long time (3 $\mu$s), the systemic populations or coherence can still strictly follow the preset evolution paths. This is the first experiment for precisely controlling the Markovian dynamics of three-level open systems, providing a solid foundation for the future realization of dynamical control in multiple open systems. An instant application of the technique demonstrated in this experiment is to stabilize the energy of quantum batteries.

Chaos Generation in Opto‐Mechanical Coupling System Assisted by Two‐Level Atoms

“…One may consider the quantum dynamics of the present system by the quantum state diffusion method. [31,53,54] Besides, one may use various protocols to accelerate the dynamics approaching chaos, such as shortcut to adiabaticity [55][56][57][58][59][60][61][62][63] or Lyapunov control. [64,65] It has been demonstrated that this procedure is effective about the study of chaos in the optomechanical system.…”

Quantum battery charging by non-equilibrium steady-state currents

“…As now, a variety of theoretical efforts have been made, including examining how quantum resources affect QB performance [10][11][12][13], presenting models for achieving optimal mechanisms for batteries such as high charging and capacity [14][15][16][17][18], slow erosion [19,20], to discussing the environmental effects on charg-ing and discharging of QBs [21][22][23][24][25][26][27]. Furthermore, several experimental platforms have been studied to realize operational quantum batteries [28][29][30][31][32][33]. In this regard, we can address the use of an organic semiconductor that is composed of two-levels systems connected to a microcavity [28].…”

“…Alternatively, QBs can be represented by semiconductor quantum dots embedded within optical microcavities, where energy is exchanged between the solid-state qubit and light fields during charging and discharging [29]. Superconducting circuits are also another field of experimental research for quantum batteries [30,31]. An example is the transmon qutrit QB, which is composed of a three-level transmon coupled to an external field.…”

Precise Nondestructive Parity Measurement of Artificial Atoms Using a Superconducting Resonator and Homodyne Measurement

“…Apart from its significant application in QEC, parity measurement also plays an important role in the field of quantum information processing (QIP), [13][14][15][16][17][18][19][20][21][22][23][24] such as quantum computation, [25][26][27][28][29][30][31] generating entangled states, [32][33][34][35][36][37][38][39][40] purifying entangled states, [41][42][43][44][45][46] and quantum teleportation. [47][48][49] Traditional parity measurement destroys the original state in the system while obtaining parity information, which leads to the waste of quantum entanglement resources.…”