Diego Barberena
University of Colorado Boulder
CouplingJosephson effectPhysicsQuantum decoherenceTopologyFock stateMode (statistics)IonPhase transitionQuantum dynamicsQuantum statePhotonQuantum simulatorAdderDipoleQuantum limitAtomic physicsField (physics)Optical cavityQubitDegrees of freedom (physics and chemistry)Condensed matter physicsPopulationQuantum electrodynamicsMolecular physicsSuperconductivityElectric fieldQuantum mechanicsSpin-½QuantumQuantum sensorQuantum teleportationDissipative system
21Publications
6H-index
83Citations
Publications 22
Newest
#1Michael A. PerlinH-Index: 6
#2Diego BarberenaH-Index: 6
Last. Ana Maria ReyH-Index: 62
view all 6 authors...
We study multilevel fermions in an optical lattice described by the Hubbard model with on site SU(n-symmetric interactions. We show that in an appropriate parameter regime this system can be mapped onto a spin model with all-to-all SU(n-symmetric couplings. Raman pulses that address internal spin states modify the atomic dispersion relation and induce spin-orbit coupling, which can act as a synthetic inhomogeneous magnetic field that competes with the SU(n exchange interactions. We inve...
#1Kevin A. GilmoreH-Index: 8
#2M. Affolter (NIST: National Institute of Standards and Technology)H-Index: 6
Last. John J. Bollinger (NIST: National Institute of Standards and Technology)H-Index: 56
view all 7 authors...
Fully controllable ultracold atomic systems are creating opportunities for quantum sensing, yet demonstrating a quantum advantage in useful applications by harnessing entanglement remains a challenging task. Here, we realize a many-body quantum-enhanced sensor to detect displacements and electric fields using a crystal of ~150 trapped ions. The center-of-mass vibrational mode of the crystal serves as a high-Q mechanical oscillator, and the collective electronic spin serves as the measurement dev...
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#2Diego Barberena (CU: University of Colorado Boulder)H-Index: 6
Last. Ana Maria Rey (CU: University of Colorado Boulder)H-Index: 62
view all 6 authors...
We propose to simulate dynamical phases of a BCS superconductor using an ensemble of cold atoms trapped in an optical cavity. Effective Cooper pairs are encoded via internal states of the atoms and attractive interactions are realized via the exchange of virtual photons between atoms coupled to a common cavity mode. Control of the interaction strength combined with a tunable dispersion relation of the effective Cooper pairs allows exploration of the full dynamical phase diagram of the BCS model,...
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#1Kevin A. GilmoreH-Index: 8
#2M. AffolterH-Index: 6
Last. John J. BollingerH-Index: 56
view all 7 authors...
Developing the isolation and control of ultracold atomic systems to the level of single quanta has led to significant advances in quantum sensing, yet demonstrating a quantum advantage in real world applications by harnessing entanglement remains a core task. Here, we realize a many-body quantum-enhanced sensor to detect weak displacements and electric fields using a large crystal of \sim 150trapped ions. The center of mass vibrational mode of the crystal serves as high-Q mechanical oscillato...
Source
#1Michael A. PerlinH-Index: 6
#2Diego BarberenaH-Index: 6
Last. Ana Maria ReyH-Index: 62
view all 3 authors...
We consider the task of performing quantum state tomography on a dstate spin qudit, using only measurements of spin projection onto different quantization axes. By an exact mapping onto the classical problem of signal recovery on the sphere, we prove that full reconstruction of arbitrary qudit states requires a minimal number of measurement axes, r_d^{\mathrm{min}} that is bounded by 2d-1\le r_d^{\mathrm{min}}\le d^2 We conjecture that r_d^{\mathrm{min}}=2d-1 which we verify numerica...
#1Michael A. PerlinH-Index: 6
#2Diego BarberenaH-Index: 6
Last. Ana Maria ReyH-Index: 62
view all 3 authors...
We consider the task of performing quantum state tomography on a dlevel spin qudit, using only measurements of spin projection onto different quantization axes. After introducing a basis of operators closely related to the spherical harmonics, which obey the rotational symmetries of spin qudits, we map our quantum tomography task onto the classical problem of signal recovery on the sphere. We then provide algorithms with O(rd^3)serial runtime, parallelizable down to O(rd^2) for (i) comp...
#1K. TuckerH-Index: 2
#2Diego BarberenaH-Index: 6
Last. Ana Maria ReyH-Index: 62
view all 6 authors...
We study the generation of spin-squeezing in arrays of long-lived dipoles subject to collective emission, coherent drive, elastic interactions, and spontaneous emission. Counter-intuitively, for fixed parameters it is found that the introduction of spontaneous emission leads to an enhancement of the achievable spin-squeezing, relative to that which emerges in the steady-state of the idealized collective dynamics. This behavior is connected to the dynamical self-tuning of the system through a dis...
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