superconducting
Devices.
ATS
Bases: FluxDevice
ATS Device.
Source code in jaxquantum/devices/superconducting/ats.py
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common_ops()
Written in the linear basis.
Source code in jaxquantum/devices/superconducting/ats.py
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get_H_full()
Return full H in linear basis.
Source code in jaxquantum/devices/superconducting/ats.py
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/ats.py
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get_H_nonlinear(phi_op)
Return nonlinear terms in H.
Source code in jaxquantum/devices/superconducting/ats.py
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/ats.py
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n_zpf()
Return Charge ZPF.
Source code in jaxquantum/devices/superconducting/ats.py
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phi_zpf()
Return Phase ZPF.
Source code in jaxquantum/devices/superconducting/ats.py
33 34 35 |
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potential(phi)
Return potential energy for a given phi.
Source code in jaxquantum/devices/superconducting/ats.py
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Device
Bases: ABC
Source code in jaxquantum/devices/base/base.py
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common_ops()
abstractmethod
Set up common ops in the specified basis.
Source code in jaxquantum/devices/base/base.py
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create(N, params, label=0, N_pre_diag=None, use_linear=False, hamiltonian=None, basis=None)
classmethod
Create a device.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
N
|
int
|
dimension of Hilbert space. |
required |
params
|
dict
|
parameters of the device. |
required |
label
|
int
|
label for the device. Defaults to 0. This is useful when you have multiple of the same device type in the same system. |
0
|
N_pre_diag
|
int
|
dimension of Hilbert space before diagonalization. Defaults to None, in which case it is set to N. This must be greater than or rqual to N. |
None
|
use_linear
|
bool
|
whether to use the linearized device. Defaults to False. This will override the hamiltonian keyword argument. This is a bit redundant with hamiltonian, but it is kept for backwards compatibility. |
False
|
hamiltonian
|
HamiltonianTypes
|
type of Hamiltonian. Defaults to None, in which case the full hamiltonian is used. |
None
|
basis
|
BasisTypes
|
type of basis. Defaults to None, in which case the fock basis is used. |
None
|
Source code in jaxquantum/devices/base/base.py
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get_H()
Return diagonalized H. Explicitly keep only diagonal elements of matrix.
Source code in jaxquantum/devices/base/base.py
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get_H_full()
abstractmethod
Return full H.
Source code in jaxquantum/devices/base/base.py
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get_H_linear()
abstractmethod
Return linear terms in H.
Source code in jaxquantum/devices/base/base.py
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get_linear_ω()
abstractmethod
Get frequency of linear terms.
Source code in jaxquantum/devices/base/base.py
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param_validation(N, N_pre_diag, params, hamiltonian, basis)
classmethod
This can be overridden by subclasses.
Source code in jaxquantum/devices/base/base.py
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Drive
Bases: ABC
Source code in jaxquantum/devices/superconducting/drive.py
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get_H()
Bare "drive" Hamiltonian (ωd * M) in the extended Hilbert space.
Source code in jaxquantum/devices/superconducting/drive.py
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FluxDevice
Bases: Device
Source code in jaxquantum/devices/superconducting/flux_base.py
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phi_zpf()
abstractmethod
Return Phase ZPF.
Source code in jaxquantum/devices/superconducting/flux_base.py
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potential(phi)
abstractmethod
Return potential energy as a function of phi.
Source code in jaxquantum/devices/superconducting/flux_base.py
70 71 72 |
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Fluxonium
Bases: FluxDevice
Fluxonium Device.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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common_ops()
Written in the linear basis.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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get_H_full()
Return full H in linear basis.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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phi_zpf()
Return Phase ZPF.
Source code in jaxquantum/devices/superconducting/fluxonium.py
40 41 42 |
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potential(phi)
Return potential energy for a given phi.
Source code in jaxquantum/devices/superconducting/fluxonium.py
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IdealQubit
Bases: Device
Ideal qubit Device.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
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common_ops()
Written in the linear basis.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
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get_H_full()
Return full H in linear basis.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
57 58 59 |
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
52 53 54 55 |
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
48 49 50 |
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param_validation(N, N_pre_diag, params, hamiltonian, basis)
classmethod
This can be overridden by subclasses.
Source code in jaxquantum/devices/superconducting/ideal_qubit.py
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KNO
Bases: Device
Kerr Nonlinear Oscillator Device.
Source code in jaxquantum/devices/superconducting/kno.py
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get_H_full()
Return full H in linear basis.
Source code in jaxquantum/devices/superconducting/kno.py
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/kno.py
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get_anharm()
Get anharmonicity.
Source code in jaxquantum/devices/superconducting/kno.py
48 49 50 |
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/kno.py
44 45 46 |
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param_validation(N, N_pre_diag, params, hamiltonian, basis)
classmethod
This can be overridden by subclasses.
Source code in jaxquantum/devices/superconducting/kno.py
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Qarray
Source code in jaxquantum/core/qarray.py
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header
property
Print the header of the Qarray.
__deepcopy__(memo)
Need to override this when defininig getattr.
Source code in jaxquantum/core/qarray.py
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__len__()
Length of the Qarray.
Source code in jaxquantum/core/qarray.py
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__truediv__(other)
For Qarray's, this only really makes sense in the context of division by a scalar.
Source code in jaxquantum/core/qarray.py
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from_array(qarr_arr)
classmethod
Create a Qarray from a nested list of Qarrays.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
qarr_arr
|
list
|
nested list of Qarrays |
required |
Returns:
Name | Type | Description |
---|---|---|
Qarray |
Qarray
|
Qarray object |
Source code in jaxquantum/core/qarray.py
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from_list(qarr_list)
classmethod
Create a Qarray from a list of Qarrays.
Source code in jaxquantum/core/qarray.py
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reshape_bdims(*args)
Reshape the batch dimensions of the Qarray.
Source code in jaxquantum/core/qarray.py
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reshape_qdims(*args)
Reshape the quantum dimensions of the Qarray.
Note that this does not take in qdims but rather the new Hilbert space dimensions.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
*args
|
new Hilbert dimensions for the Qarray. |
()
|
Returns:
Name | Type | Description |
---|---|---|
Qarray |
reshaped Qarray. |
Source code in jaxquantum/core/qarray.py
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resize(new_shape)
Resize the Qarray to a new shape.
TODO: review and maybe deprecate this method.
Source code in jaxquantum/core/qarray.py
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Resonator
Bases: FluxDevice
Resonator Device.
Source code in jaxquantum/devices/superconducting/resonator.py
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common_ops()
Written in the linear basis.
Source code in jaxquantum/devices/superconducting/resonator.py
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get_H_full()
Return full H in linear basis.
Source code in jaxquantum/devices/superconducting/resonator.py
50 51 52 |
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/resonator.py
45 46 47 48 |
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/resonator.py
41 42 43 |
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phi_zpf()
Return Phase ZPF.
Source code in jaxquantum/devices/superconducting/resonator.py
33 34 35 |
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potential(phi)
Return potential energy for a given phi.
Source code in jaxquantum/devices/superconducting/resonator.py
54 55 56 |
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Transmon
Bases: FluxDevice
Transmon Device.
Source code in jaxquantum/devices/superconducting/transmon.py
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calculate_wavefunctions(phi_vals)
Calculate wavefunctions at phi_exts.
Source code in jaxquantum/devices/superconducting/transmon.py
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common_ops()
Written in the specified basis.
Source code in jaxquantum/devices/superconducting/transmon.py
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get_H_full()
Return full H in specified basis.
Source code in jaxquantum/devices/superconducting/transmon.py
122 123 124 |
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get_H_linear()
Return linear terms in H.
Source code in jaxquantum/devices/superconducting/transmon.py
117 118 119 120 |
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get_H_truncated()
Return truncated H in specified basis.
Source code in jaxquantum/devices/superconducting/transmon.py
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get_linear_ω()
Get frequency of linear terms.
Source code in jaxquantum/devices/superconducting/transmon.py
113 114 115 |
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n_zpf()
Return Charge ZPF.
Source code in jaxquantum/devices/superconducting/transmon.py
109 110 111 |
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param_validation(N, N_pre_diag, params, hamiltonian, basis)
classmethod
This can be overridden by subclasses.
Source code in jaxquantum/devices/superconducting/transmon.py
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phi_zpf()
Return Phase ZPF.
Source code in jaxquantum/devices/superconducting/transmon.py
105 106 107 |
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potential(phi)
Return potential energy for a given phi.
Source code in jaxquantum/devices/superconducting/transmon.py
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TunableTransmon
Bases: Transmon
Tunable Transmon Device.
Source code in jaxquantum/devices/superconducting/tunable_transmon.py
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cosm(qarr)
Matrix cosine wrapper.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
qarr
|
Qarray
|
quantum array |
required |
Returns:
Type | Description |
---|---|
Qarray
|
matrix cosine |
Source code in jaxquantum/core/qarray.py
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create(N)
creation operator
Parameters:
Name | Type | Description | Default |
---|---|---|---|
N
|
Hilbert space size |
required |
Returns:
Type | Description |
---|---|
Qarray
|
creation operator in Hilber Space of size N |
Source code in jaxquantum/core/operators.py
98 99 100 101 102 103 104 105 106 107 |
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destroy(N)
annihilation operator
Parameters:
Name | Type | Description | Default |
---|---|---|---|
N
|
Hilbert space size |
required |
Returns:
Type | Description |
---|---|
Qarray
|
annilation operator in Hilber Space of size N |
Source code in jaxquantum/core/operators.py
86 87 88 89 90 91 92 93 94 95 |
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harm_osc_wavefunction(n, x, l_osc)
Taken from scqubits... not jit-able
For given quantum number n=0,1,2,... return the value of the harmonic
oscillator wave function :math:\psi_n(x) = N H_n(x/l_{osc}) \exp(-x^2/2l_\text{
osc})
, N being the proper normalization factor.
Directly uses scipy.special.pbdv
(implementation of the parabolic cylinder
function) to mitigate numerical stability issues with the more commonly used
expression in terms of a Gaussian and a Hermite polynomial factor.
Parameters
n: index of wave function, n=0 is ground state x: coordinate(s) where wave function is evaluated l_osc: oscillator length, defined via <0|x^2|0> = l_osc^2/2
Returns
value of harmonic oscillator wave function
Source code in jaxquantum/devices/common/utils.py
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identity(*args, **kwargs)
Identity matrix.
Returns:
Type | Description |
---|---|
Qarray
|
Identity matrix. |
Source code in jaxquantum/core/operators.py
122 123 124 125 126 127 128 |
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jnp2jqt(arr, dims=None)
JAX array -> QuTiP state.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
jnp_obj
|
JAX array. |
required | |
dims
|
Optional[Union[DIMS_TYPE, List[int]]]
|
Qarray dims. |
None
|
Returns:
Type | Description |
---|---|
QuTiP state. |
Source code in jaxquantum/core/conversions.py
79 80 81 82 83 84 85 86 87 88 89 90 |
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sigmam()
σ-
Returns:
Type | Description |
---|---|
Qarray
|
σ- Pauli Operator |
Source code in jaxquantum/core/operators.py
51 52 53 54 55 56 57 |
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sigmap()
σ+
Returns:
Type | Description |
---|---|
Qarray
|
σ+ Pauli Operator |
Source code in jaxquantum/core/operators.py
60 61 62 63 64 65 66 |
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sigmax()
σx
Returns:
Type | Description |
---|---|
Qarray
|
σx Pauli Operator |
Source code in jaxquantum/core/operators.py
15 16 17 18 19 20 21 |
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sigmay()
σy
Returns:
Type | Description |
---|---|
Qarray
|
σy Pauli Operator |
Source code in jaxquantum/core/operators.py
24 25 26 27 28 29 30 |
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sigmaz()
σz
Returns:
Type | Description |
---|---|
Qarray
|
σz Pauli Operator |
Source code in jaxquantum/core/operators.py
33 34 35 36 37 38 39 |
|