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Topological lattices realized in superconducting circuit optomechanics
Optomechanical lattices in one and two dimensions with exceptionally low disorder are realized, showing how the optomechanical interaction can be exploited for direct measurements of the Hamiltonian, beyond the tight-binding approximation.
- Amir Youssefi
- , Shingo Kono
- & Tobias J. Kippenberg
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Measuring the knot of non-Hermitian degeneracies and non-commuting braids
Control loops generically produce braids of eigenfrequencies, and these braids form a non-Abelian group that reflects the non-trivial geometry of the space of degeneracies; these features are demonstrated experimentally using a cavity optomechanical system.
- Yogesh S. S. Patil
- , Judith Höller
- & Jack G. E. Harris
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Non-Hermitian chiral phononics through optomechanically induced squeezing
Time-reversal symmetry breaking is combined with non-Hermitian dynamics in an optomechanical system with squeezing interactions to produce chirality in the system, and a non-Hermitian Aharonov–Bohm effect is observed.
- Javier del Pino
- , Jesse J. Slim
- & Ewold Verhagen
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Quantum control of a nanoparticle optically levitated in cryogenic free space
Quantum control of an optically levitated nanoparticle with a mass of just one femtogram is demonstrated in a cryogenic environment by feedback-cooling the motion of the particle to the quantum ground state.
- Felix Tebbenjohanns
- , M. Luisa Mattana
- & Lukas Novotny
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Phonon heat transfer across a vacuum through quantum fluctuations
Conventionally, heat transfer occurs by conduction, convection or radiation, but has also been theoretically predicted to occur through quantum fluctuations across a vacuum; this prediction has now been confirmed experimentally.
- King Yan Fong
- , Hao-Kun Li
- & Xiang Zhang
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Letter |
Stationary entangled radiation from micromechanical motion
A parametrically driven 30-micrometre-long silicon nanostring oscillator emits stationary path-entangled microwave radiation, squeezing the joint field operators of two thermal modes by 3.4 decibels below the vacuum level.
- S. Barzanjeh
- , E. S. Redchenko
- & J. M. Fink
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Letter |
Nonreciprocal control and cooling of phonon modes in an optomechanical system
A cavity optomechanical scheme produces robust nonreciprocal coupling between phononic resonators and is used to control the resonators’ thermal fluctuations.
- H. Xu
- , Luyao Jiang
- & J. G. E. Harris
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Letter |
Real-time vibrations of a carbon nanotube
The thermal vibrations of a carbon nanotube are directly measured in real time with high displacement sensitivity and fine time resolution, revealing dynamics undetected by previous time-averaged measurements.
- Arthur W. Barnard
- , Mian Zhang
- & Paul L. McEuen
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Letter |
Sideband cooling beyond the quantum backaction limit with squeezed light
Squeezed light is used to sideband cool the motion of a macroscopic mechanical object below the limit imposed by quantum fluctuations.
- Jeremy B. Clark
- , Florent Lecocq
- & John D. Teufel
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Letter |
Topological energy transfer in an optomechanical system with exceptional points
The transfer of energy between two vibrational modes of an optomechanical device is achieved using topological operations; the key to this transfer is the existence of an exceptional point in the complex spectrum of the device.
- H. Xu
- , D. Mason
- & J. G. E. Harris
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Letter |
Optical detection of radio waves through a nanomechanical transducer
A room-temperature nanomechanical transducer that couples efficiently to both radio waves and light allows radio-frequency signals to be detected as an optical phase shift with quantum-limited sensitivity.
- T. Bagci
- , A. Simonsen
- & E. S. Polzik
Room-temperature quantum optomechanics using an ultralow noise cavity