Two-Photon Blockade in an Atom-Driven Cavity QED System

Hamsen, Christoph; Tolazzi, Karl Nicolas; Wilk, Tatjana; Rempe, Gerhard

doi:10.1103/physrevlett.118.133604

Cited by 253 publications

(201 citation statements)

References 44 publications

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“…blet, indicating a suppression of multiple excitations which is indeed due to a single-photon blockade [86]. On the other hand, the g (2) (0) function of the two-photon QRM is always larger than 1 (super-Poissonian statistics), which is an indication of a higher-photon number in the cavity output field.…”

Section: Qubit Drivingmentioning

confidence: 97%

“…out < 1 (threephoton correlation function) [86]. These conditions indicate two-photon bunching and three-photon antibunching, respectively.…”

Section: Qubit Drivingmentioning

confidence: 98%

“…Notice that the two-photon QRM exhibits a wide region of values of D for which simultaneously g (2) (0) ≥ 1 and g (3) (0) < 1, signaling the presence of two-photon blockade, i.e., the absorption of two photons by the cavity (via the absorption of a single photon by the qubit) prevents the system from absorbing further photons. Such a dynamical quantum-nonlinear effect has been observed in an atom-cavity system (JC system) driven close to a two-photon resonance [86]. The circuit scheme here proposed allows the implementation of this phenomenon as a first-order process, on a platform capable of reaching the USC regime (see Sec.…”

Section: Qubit Drivingmentioning

confidence: 99%

See 2 more Smart Citations

Two-photon quantum Rabi model with superconducting circuits

Felicetti¹,

Rossatto²,

Rico³

et al. 2018

Phys. Rev. A

141

168

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We propose a superconducting circuit to implement a two-photon quantum Rabi model in a solid-state device, where a qubit and a resonator are coupled by a two-photon interaction. We analyze the input-output relations for this circuit in the strong coupling regime and find that fundamental quantum optical phenomena are qualitatively modified. For instance, two-photon interactions are shown to yield single-or two-photon blockade when a pumping field is either applied to the cavity mode or to the qubit, respectively. In addition, we derive an effective Hamiltonian for perturbative ultrastrong two-photon couplings in the dispersive regime, where twophoton interactions introduce a qubit-state-dependent Kerr term. Finally, we analyze the spectral collapse of the multi-qubit two-photon quantum Rabi model and find a scaling of the critical coupling with the number of qubits. Using realistic parameters with the circuit proposed, three qubits are sufficient to reach the collapse point.

show abstract

Section: Qubit Drivingmentioning

confidence: 97%

“…out < 1 (threephoton correlation function) [86]. These conditions indicate two-photon bunching and three-photon antibunching, respectively.…”

Section: Qubit Drivingmentioning

confidence: 98%

Section: Qubit Drivingmentioning

confidence: 99%

See 1 more Smart Citation

Two-photon quantum Rabi model with superconducting circuits

Felicetti¹,

Rossatto²,

Rico³

et al. 2018

Phys. Rev. A

141

168

View full text Add to dashboard Cite

show abstract

“…In order to account for this effect, we calculate the overlap of the excited states in the sector with n+1 photons with the ground state of the manifold with n photons, f ñ | n . First of all, we notice that the overlap between the excited states with k quasiparticle excitations of only one type, and the ground state in the neighboring sector, is equal to zero for any number of excitations (k>0): In these expressions one can recognise the overlap between the ground states of adjacent photonic manifolds, given by equation (14).…”

Section: Perspectivesmentioning

confidence: 99%

“…1 , are assisted by matrix elements of the perturbation ¢ H , which are smaller than the one connecting the two ground states. This is shown in the appendix: equations (A5) and (A6) display the matrix elements for the transition between the ground state and these two excited ones, and they should be compared with equation (14), reporting the overlap between ground states. The overlaps involving excited states are always smaller by a factor proportional to increasing powers of f f -+ ( ) tanh n n 1 (a quantity always smaller than one) as higher excited states are considered.…”

Section: Landau-zener (Lz) Theory Of the Photons' Staircasementioning

confidence: 99%

Spectrum, Landau–Zener theory and driven-dissipative dynamics of a staircase of photons

et al. 2019

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We study the production of photons in a model of three bosonic atomic modes nonlinearly coupled to a cavity mode. In the absence of external driving and dissipation, the energy levels at different photon numbers assemble into the steps of an energy staircase which can be employed as guidance for preparing multi-photon states. We consider adiabatic photon production, driving the system through a sequence of Landau-Zener transitions in the presence of external coherent light pumping. We also analyse the non-equilibrium dynamics of the system resulting from the competition of the sudden switch of coherent photon pumping and cavity photon losses, and we find that the system approaches a plateau with a given number of photons, which becomes metastable upon increasing the rate of photon pumping. We discuss the sensitivity of the time scales for the onset of this metastable behavior to system parameters and predict the value of photons attained, solving the driven-dissipative dynamics including three-body correlations between light and matter degrees of freedom.

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Controlling the Manifold of Polariton States Through Molecular Disorder

George,

Geraghty,

Kelsey

et al. 2024

Advanced Optical Materials

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Exciton polaritons, arising from the interaction of electronic transitions with confined electromagnetic fields, have emerged as a powerful tool to manipulate the properties of organic materials. However, standard experimental and theoretical approaches overlook the significant energetic disorder present in most materials now studied. Using the conjugated polymer P3HT as a model platform, the degree of energetic disorder is systematically tuned and a corresponding redistribution of photonic character within the polariton manifold is observed. Based on these subtle spectral features, a more generalized approach is developed to describe strong light‐matter coupling in disordered systems that captures the key spectroscopic observables and provides a description of the rich manifold of states intermediate between bright and dark. Applied to a wide range of organic systems, the method challenges prevailing notions about ultrastrong coupling and whether it can be achieved with broad, disordered absorbers.

show abstract

Two-Photon Blockade in an Atom-Driven Cavity QED System

Cited by 253 publications

References 44 publications

Two-photon quantum Rabi model with superconducting circuits

Two-photon quantum Rabi model with superconducting circuits

Spectrum, Landau–Zener theory and driven-dissipative dynamics of a staircase of photons

Controlling the Manifold of Polariton States Through Molecular Disorder

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