Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Zeuthen, Emil"'
We experimentally demonstrate a source of squeezed light featuring simultaneous ponderomotive squeezing from two mechanical modes of an optomechanical system. We use ultra-coherent vibrational modes ($Q$ factors on the order of $10^{8}$) of a soft-cl
Externí odkaz:
http://arxiv.org/abs/2412.03303
Autor:
Jia, Jun, Novikov, Valeriy, Brasil, Tulio Brito, Zeuthen, Emil, Müller, Jörg Helge, Polzik, Eugene S.
Publikováno v:
Nature Communications 6396 (2023)
We experimentally demonstrate quantum behavior of a macroscopic atomic spin oscillator in the acoustic frequency range. Quantum back-action of the spin measurement, ponderomotive squeezing of light, and oscillator spring softening are observed at spi
Externí odkaz:
http://arxiv.org/abs/2303.11029
Autor:
Bærentsen, Christian, Fedorov, Sergey A., Østfeldt, Christoffer, Balabas, Mikhail V., Zeuthen, Emil, Polzik, Eugene S.
Publikováno v:
Nat Commun 15, 4146 (2024)
Continuous measurements of the position of an oscillator become projective on position eigenstates when the measurements are made faster than the coherent evolution. We evidence an effect of this transition on a spin oscillator within an ensemble of
Externí odkaz:
http://arxiv.org/abs/2302.13633
Autor:
Fedorov, Sergey A., Zeuthen, Emil
Publikováno v:
Phys. Rev. Lett. 131, 060801 (2023)
Regular measurements allow predicting the future and retrodicting the past of quantum systems. Time-non-local measurements can leave the future and the past uncertain, yet establish a relation between them. We show that continuous time-non-local meas
Externí odkaz:
http://arxiv.org/abs/2302.11450
It is well established that measurement-induced quantum back action (QBA) can be eliminated in composite systems by engineering so-called quantum-mechanics-free subspaces (QMFSs) of commuting variables, leading to a trajectory of a quantum system wit
Externí odkaz:
http://arxiv.org/abs/2111.02697
Autor:
Khalili, Farid Ya., Zeuthen, Emil
Publikováno v:
Phys. Rev. A 103, 043721 (2021)
State-of-the-art sensors of force, motion and magnetic fields have reached the sensitivity where the quantum noise of the meter is significant or even dominant. In particular, the sensitivity of the best optomechanical devices has reached the Standar
Externí odkaz:
http://arxiv.org/abs/2011.14716
Autor:
Thomas, Rodrigo A., Parniak, Michał, Østfeldt, Christoffer, Møller, Chistoffer B., Bærentsen, Christian, Tsaturyan, Yeghishe, Schliesser, Albert, Appel, Jürgen, Zeuthen, Emil, Polzik, Eugene S.
Entanglement is a vital property of multipartite quantum systems, characterised by the inseparability of quantum states of objects regardless of their spatial separation. Generation of entanglement between increasingly macroscopic and disparate syste
Externí odkaz:
http://arxiv.org/abs/2003.11310
Publikováno v:
Phys. Rev. D 100, 062004 (2019)
Gravitational wave detectors (GWDs), which have brought about a new era in astronomy, have reached such a level of maturity that further improvement necessitates quantum-noise-evading techniques. Numerous proposals to this end have been discussed in
Externí odkaz:
http://arxiv.org/abs/1908.03416
Publikováno v:
Phys. Rev. Applied 13, 014027 (2020)
The successes of superconducting quantum circuits at local manipulation of quantum information and photonics technology at long-distance transmission of the same have spurred interest in the development of quantum transducers for efficient, low-noise
Externí odkaz:
http://arxiv.org/abs/1907.04830
Publikováno v:
Phys. Rev. A 100, 012318 (2019)
Generation of quantum correlations between separate objects is of significance both in fundamental physics and in quantum networks. One important challenge is to create the directional "spooky action-at-a-distanc" effects that Schr\"{o}dinger called
Externí odkaz:
http://arxiv.org/abs/1901.04250