Direct detection of classically undetectable dark matter through quantum decoherence

Riedel, C. Jess

doi:10.1103/physrevd.88.116005

Cited by 60 publications

(80 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At approximately 10 −2 -10 −3 mbar, black-body radiation becomes the dominant heat dissipation mechanism and the temperature stabilizes at 1400 K. At atmospheric pressure, nanodiamond graphitizes between 940 and 1070 K [48,49]. Therefore, low absorption grade (850 K) or electronic grade (400 K) material might be required to reach the pressures required for proposals [1][2][3][4][5][6][7][8][9].…”

Section: Discussionmentioning

confidence: 99%

“…Optically levitated nanodiamonds containing nitrogen vacancy (NV − ) centre spin defects have been proposed as probes of quantum gravity [1,2], mesoscopic wavefunction collapse [3][4][5][6], phonon mediated spin coupling [7], and the direct detection of dark matter [8,9]. The NV − centre is a point defect in diamond that has a single electron spin which has long coherence times at room temperature and can be both polarized and read out optically [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pure nanodiamonds for levitated optomechanics in vacuum

et al. 2018

View full text Add to dashboard Cite

Optical trapping at high vacuum of a nanodiamond containing a nitrogen vacancy centre would provide a test bed for several new phenomena in fundamental physics. However, the nanodiamonds used so far have absorbed too much of the trapping light, heating them to destruction (above 800 K) except at pressures above ∼10 mbar where air molecules dissipate the excess heat. Here we show that milling diamond of 1000 times greater purity creates nanodiamonds that do not heat up even when the optical intensity is raised above 700 GW m −2 below 5 mbar of pressure.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pure nanodiamonds for levitated optomechanics in vacuum

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Trapped nanoparticles hold promise for testing so-called collapse models [30,31] also by non-interferometric means [32][33][34][35]. The simple, robust and easily vacuum compatible mirror trap might provide useful technology for spectroscopy investigation of environmental independent nanoparticles properties, experiments in space [36], and the detection of speculative particles [37,38]. The high Q m value and the precise position detection of 200fm/ √ Hz for a single particle of mass in excess of atomic scales holds promise for various sensing application based on classical levitated optomechanics [39].…”

Section: Figmentioning

confidence: 99%

Parametric feedback cooling of levitated optomechanics in a parabolic mirror trap

et al. 2017

View full text Add to dashboard Cite

Levitated optomechanics, a new experimental physics platform, holds promise for fundamental science and quantum technological sensing applications. We demonstrate a simple and robust geometry for optical trapping in vacuum of a single nanoparticle based on a parabolic mirror and the optical gradient force. We demonstrate rapid parametric feedback cooling of all three motional degrees of freedom from room temperature to a few mK. A single laser at 1550nm, and a single photodiode, are used for trapping, position detection, and cooling for all three dimensions. Particles with diameters from 26nm to 160nm are trapped without feedback to 10 −5 mbar and with feedback-engaged the pressure is reduced to 10 −6 mbar. Modifications to the harmonic motion in the presence of noise and feedback are studied, and an experimental mechanical quality factor in excess of 4×10 7 is evaluated. This particle manipulation is key to build a nanoparticle matter-wave interferometer in order to test the quantum superposition principle in the macroscopic domain.

show abstract

“…In this work we focus on preparing spin-squeezed states appropriate for matter-wave atom interferometry with applications including inertial sensing [9], measurements of gravity and freefall, [10,11] and even the search for certain proposed types of dark matter and dark energy [12,13].…”

mentioning

confidence: 99%

Spatially homogeneous entanglement for matter-wave interferometry created with time-averaged measurements

Cox

Greve

et al. 2016

Phys. Rev. A

View full text Add to dashboard Cite

We demonstrate a method to generate spatially homogeneous entangled, spin-squeezed states of atoms appropriate for maintaining a large amount of squeezing even after release into the arm of a matter-wave interferometer or other free space quantum sensor. Using an effective intracavity dipole trap, we allow atoms to move along the cavity axis and time average their coupling to the standing wave used to generate entanglement via collective measurements, demonstrating 11(1) dB of directly observed spin squeezing. Our results show that time averaging in collective measurements can greatly reduce the impact of spatially inhomogeneous coupling to the measurement apparatus.Spin-1/2 atoms must project into either "up" or "down" when measured. For N unentangled atoms, the independent randomness in this quantum projection fundamentally limits the single-shot phase resolution of any quantum sensor to ∆φ SQL = 1/ √ N rad, the standard quantum limit (SQL) [1]. Collective measurements of atoms in optical cavities have recently produced some of the most strongly entangled, spin-squeezed states to date, directly improving the phase resolution of a quantum sensor's "clock hand" by a factor up to 60-70 (roughly 18 dB) in noise variance below the SQL [2,3].Spin-squeezed states could be used to improve a wide range of quantum sensors, with today's best atomic clocks [4][5][6] being particularly promising candidates [7,8]. In this work we focus on preparing spin-squeezed states appropriate for matter-wave atom interferometry with applications including inertial sensing [9], measurements of gravity and freefall, [10,11] and even the search for certain proposed types of dark matter and dark energy [12,13].A major challenge arises for cavity-based atom interferometry and other applications involving release of spinsqueezed atoms into free space. The problem is that the probe mode used to perform the collective measurement is a standing wave, but the atoms are trapped in a 1-dimensional lattice defined by a standing wave cavity mode with a significantly different wavelength. Some atoms will sit in lattice sites positioned near nodes and some near anti-nodes of the entanglement-generating probe light. As a result, the atoms will contribute to the collective measurement with different strengths. In this common case, the large degree of squeezing exists only for this specific coupling configuration and would be largely lost after releasing the atoms into the arm of an interferometer, since their final coupling to the cavity mode or other readout detector will be different from the original configuration [14]. In contrast, we wish to create spatially homogeneous entanglement, quantified by the amount of observed phase resolution beyond the SQL that one can achieve when every atom couples equally to the final measurement apparatus.In this Letter, we demonstrate a method to create ho- FIG. 1. (a)Optical lattice sidebands separated by one free spectral range (FSR) are injected into the cavity to create an axially homogeneous "dipole" trap. Dip...

show abstract

Direct detection of classically undetectable dark matter through quantum decoherence

Cited by 60 publications

References 77 publications

Pure nanodiamonds for levitated optomechanics in vacuum

Pure nanodiamonds for levitated optomechanics in vacuum

Parametric feedback cooling of levitated optomechanics in a parabolic mirror trap

Spatially homogeneous entanglement for matter-wave interferometry created with time-averaged measurements

Contact Info

Product

Resources

About