Parity-time-symmetry enhanced optomechanically-induced-transparency

Abstract

We propose and analyze a scheme to enhance optomechanically-induced-transparency (OMIT) based on parity-time-symmetric optomechanical system. Our results predict that an OMIT window which does not exist originally can appear in weak optomechanical coupling and driving system via coupling an auxiliary active cavity with optical gain. This phenomenon is quite different from these reported in previous works in which the gain is considered just to damage OMIT phenomenon even leads to electromagnetically induced absorption or inverted-OMIT. Such enhanced OMIT effects are ascribed to the additional gain which can increase photon number in cavity without reducing effective decay. We also discuss the scheme feasibility by analyzing recent experiment parameters. Our work provide a promising platform for the coherent manipulation and slow light operation, which has potential applications for quantum information processing and quantum optical device.

Quantum-correlation-enhanced weak-field detection in an optomechanical system

“…Quantum technology has a very important application prospect in ultrasensitive detection, such as mass sensor [1], force sensor [2] and quantum gyroscopes [3], etc. The use of quantum correlation can provide substantial enhancements for detecting and imaging the weak signals in the presence of high levels of noise and loss [4][5][6][7][8][9]. Emission entangled photon to improve the detection signalto-noise ratio (SNR) in quantum illumination [4,5], via optical parametric amplification to enhance the quality of ghost imaging [6], intracavity squeezing to enhance the precision of a position measurement [9].…”

Optomechanical force sensor in a non-Markovian regime

“…However, reduced shot noise would increase quantum back-action noise force due to the opposite scalings with the optical field intensity [7]. Many schemes have been proposed to optimally compromise between photon shot noise and quantum back-action [8], which leads to the standard quantum limit (SQL) in weak force sensing [9,10]. Various approaches to beyond-SQL measurements have been proposed [11][12][13][14][15], including optical squeezing in the optomechanical system [5,14], atomic assistance in a separate cavity [13], mechanical modification by light [15], and so on.…”

Simulating Z_2 topological insulators via a one-dimensional cavity optomechanical cells array

“…In recent years, with the fast-developing fields of micro-nano manufacturing and materials precessing technology, quantum optical platform is widely used to quantum information processing [21][22][23][24][25][26] 51], entanglement between mechanical resonator and cavity field or atom [52][53][54][55], macroscopic quantum superposition [56], squeezing light [57][58][59] and squeezing resonator [60][61][62][63][64][65]. Besides, the cavity optomechanical system has the widely promising applications in the field of high-precision measurement, such as micro-mass measurement, micro-displacement measurement, weak force measurement, gravitational-wave detection [66], and so on.…”