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

Zhang, Wenzhao; Chen, Libo; Cheng, Jiong; Jiang, Yunfeng

doi:10.1103/physreva.99.063811

Cited by 20 publications

(12 citation statements)

References 44 publications

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“…2 to ensure that the total linear system is stable even under CQNC. The high-sensibility in quantum metrology can also be shown by the signal-to-noise ratio [44], which can be defined as R(ω) ≡ F ext /S(ω). Here the external force acting on the mechanical oscillator is assumed to be constant for simplicity.…”

Section: Weak Force Detection With Cqncmentioning

confidence: 99%

Coherent noise cancellation in optomechanical system with double optical modes

Yan,

Jing

2020

Preprint

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A quantum metrology protocol for continuous force sensing is developed beyond the quantum standard limit on performing a coherent quantum noise cancellation (CQNC) strategy in an optomechanical system, that consists of two optical modes with non-identical frequencies and a mechanical mode. In particular, an ultrasensitive susceptibility around the mechanical-mode frequency is solely achieved with driving the higher-frequency optical mode and probing the lower-frequency one. More importantly, this asymmetrical and unique treatment allows the ancillary optical mode to constitute an effective coherent channel for implementing the CQNC strategy, when the ancillary mode is set to be near-resonant with the probe mode to avoid the disturbance from the driven mode. The ancillary mode then acts as a negative-frequency mechanical oscillator to offset the backaction noise arising from both radiation-pressure and driving. Under the condition of strong driving and strong coupling, the measurement sensitivity as well as the signal-to-noise ratio in our optomechanicalsensing scheme is therefore found to be significantly enhanced by about two orders in magnitude, comparing to that without noise cancellation. In addition, our scheme can be practiced in a tripartite optomechanical setup with a membrane in the middle and a twisted-cavity-based weak-torque detector.

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Section: Weak Force Detection With Cqncmentioning

confidence: 99%

Coherent noise cancellation in optomechanical system with double optical modes

Yan,

Jing

2020

Preprint

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“…Nonreciprocal quantum state transmission has emerged as an indispensable tool for the important applications in quantum information processing such as optical diode [1][2][3], noise-free sensing [4], unidirectional amplifier [5], and nonreciprocal phase shifter [6]. A nonreciprocal response can be generated by direct broken the time-reversal symmetry in the transmission.…”

Section: Introductionmentioning

confidence: 99%

Nonlocal nonreciprocal optomechanical circulator

Zheng,

Peng,

Cheng

et al. 2021

Preprint

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A nonlocal circulator protocol is proposed in hybrid optomechanical system. By analogy with quantum communication, using the input-output relationship, we establish the quantum channel between two optical modes with long-range. The three body nonlocal interaction between the cavity and the two oscillators is obtained by eliminating the optomechanical cavity mode and verifying the Bell-CHSH inequality of continuous variables. By introducing the phase accumulation between cyclic interactions, the unidirectional transmission of quantum state between optical mode and two mechanical modes are achieved. The results show that nonreciprocal transmissions are achieved as long as the accumulated phase reaches a certain value. In addition, the effective interaction parameters in our system are amplified, which reduces the difficulty of the implementation of our protocol. Our research can provide potential applications for nonlocal manipulation and transmission control of quantum platforms.

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“…Among the latest experimental breakthroughs, it is worth highlighting the demonstration of force and position measurement below the SQL [29], and the achievement of quantum amplification of the displacement of a mechanical oscillator using a single-trapped ion [30]. On the theoretical side, recent proposals in the modification of the sensor design have included, inserting a degenerate optical parametric amplifier in an optomechanical cavity [31,32], introducing an auxiliary mechanical oscillator [33,34], using hybrid atom-cavity optomechanical setups [35][36][37], and taking advantage of the electromagnetically induced transparency in an ensemble of three-level atoms [38].…”

Section: Introductionmentioning

confidence: 99%

Nonstationary force sensing under dissipative mechanical quantum squeezing

Bernal-García,

Vinck-Posada,

Woolley

2020

Preprint

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We study the stationary and nonstationary measurement of a classical force driving a mechanical oscillator coupled to an electromagnetic cavity under two-tone driving. For this purpose, we develop a theoretical framework based on the signal-to-noise ratio to quantify the sensitivity of linear spectral measurements. Then, we consider stationary force sensing and study the necessary conditions to minimise the added force noise. We find that imprecision noise and back-action noise can be arbitrarily suppressed by manipulating the amplitudes of the input coherent fields, however, the force noise power spectral density cannot be reduced below the level of thermal fluctuations. Therefore, we consider a nonstationary protocol that involves non-thermal dissipative state preparation followed by a finite measurement time, which allows one to perform measurements with a signal-to-noise much greater than the maximum possible in a stationary measurement scenario. Conditions for optimal force noise sensitivity are determined, and the corresponding force noise power spectral densities are calculated.

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

Cited by 20 publications

References 44 publications

Coherent noise cancellation in optomechanical system with double optical modes

Coherent noise cancellation in optomechanical system with double optical modes

Nonlocal nonreciprocal optomechanical circulator

Nonstationary force sensing under dissipative mechanical quantum squeezing

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