Coupling Nanomechanical Cantilevers to Dipolar Molecules

Abstract

We investigate the coupling of a nanomechanical oscillator in the quantum regime with molecular (electric) dipoles. We find theoretically that the cantilever can produce single-mode squeezing of the center-of-mass motion of an isolated trapped molecule and two-mode squeezing of the phonons of an array of molecules. This work opens up the possibility of manipulating dipolar crystals, which have been recently proposed as quantum memory, and more generally, is indicative of the promise of nanoscale cantilevers for the quantum detection and control of atomic and molecular systems.

Quantum decoherence of an anharmonic oscillator monitored by a Bose-Einstein condensate

“…In the general case, for arbitrary values of β, many different time-dependent terms will contribute to the sum in (14). However, in some limiting cases and under some approximations, analytical expressions can be obtained that describe the time decay with accuracy.…”

“…Also ions are proposed as transducers for electromechanical oscillators [13] while other proposals involve the coupling between oscillators and dipolar molecules [14]. A growing interest, both theoretical and experimental, is therefore apparent in the study of nanomechanical oscillators and their interaction with other quantum systems [4,15].…”

Coupling of a nanomechanical oscillator and an atomic three-level medium

“…This facilitates interfacing with diverse quantum devices, such as optical cavities [2], Josephson circuits [9] or quantum dots [10] in hybrid setups. A newly emerging group of hybrid setups involves atomic or molecular systems [11][12][13][14][15][16][17][18][19][20][21][22]. They enable the exploitation of the versatile toolkit of cold atom quantum manipulations for the control of mechanical systems.…”

“…They enable the exploitation of the versatile toolkit of cold atom quantum manipulations for the control of mechanical systems. Recent work has established that coupling internal states of atomic or molecular ensembles to nano-mechanical oscillators yields intriguing features, such as atom-mirror entanglement [15,16] and mechanical squeezing [17].…”

Optomechanical effects in superfluid properties of BEC in an optical lattice

“…Studies on the Dicke model of the BEC in optical cavities show some exotic phase diagrams [17][18][19][20][21]. Recently the field of cavity optomechanics has become an attractive research topic with a wide variety of systems ranging from gravitational wave detectors [22,23], nanomechanical cantilevers [24][25][26][27][28][29], vibrating microtoroids [30,31], membranes [32], Bose-Einstein condensate [33][34][35][36][37][38][39][40][41][42][43][44][45] and atomic ensembles [46][47][48][49][50][51].…”